Dygraphs Options Reference

From: Dan Vanderkam Date: Mon, 14 Mar 2011 23:28:48 +0000 (-0400) Subject: Merge branch 'master' of https://github.com/raineth/dygraphs X-Git-Tag: v1.0.0~559 X-Git-Url: https://adrianiainlam.tk/git/?a=commitdiff_plain;h=35a3c487b50e297b4a01522ab208ed394cfd88e3;hp=e9d78bacc2271758c0c9472c37a402f4c3a45faf;p=dygraphs.git Merge branch 'master' of https://github.com/raineth/dygraphs --- diff --git a/docs/index.html b/docs/index.html index 8693bc9..772ab2c 100644 --- a/docs/index.html +++ b/docs/index.html @@ -122,7 +122,7 @@

Plots time series without using an external server or Flash
Works in Internet Explorer (using excanvas)
Lightweight (57kb) and responsive
Lightweight (69kb) and responsive
Displays values on mouseover (this makes it easily discoverable)
Supports error bands around data series
Interactive zoom

Other Options

These are the options that can be passed in through the optional third parameter of the Dygraph constructor. Under each option is a set of links to tests which demonstrate its use. While we attempt to keep this list up-to-date, a more complete list can be found in the Dygraph.DEFAULT_ATTRS map in dygraph.js and the this.options map in dygraph-canvas.js.

Name	Values	Default	Description
includeZero	`boolean`	`false`	Usually, dygraphs will use the range of the data plus some padding to set the range of the y-axis. If this option is set, the y-axis will always include zero, typically as the lowest value. This can be used to avoid exaggerating the variance in the data. - Tests: no-range numeric-gviz small-range-zero -
rollPeriod	`integer >= 1`	`1`	Number of days over which to average data. Discussed extensively above. - Tests: demo two-series noise -
showRoller	`boolean`	`false`	If the rolling average period text box should be shown. - Tests: callback crosshair fractions isolated-points numeric-gviz underlay-callback highlighted-region -
colors	`['red', '#00FF00']`		List of colors for the data series. These can be of the form "#AABBCC" or "rgb(255,100,200)" or "yellow", etc. If not specified, equally-spaced points around a color wheel are used. - Tests: color-visibility demo -
fillGraph	`boolean`	`false`	Should the area underneath the graph be filled? This option is not - compatible with error bars. - Tests: fillGraph -
visibility	`Array of booleans`	`[true, true, ...]`	Which series should initially be visible? Once the Dygraph has - been constructed, you can access and modify the visibility of each - series using the `visibility` and - `setVisibility` methods. - Tests: visibility color-visibility -
colorSaturation	`0.0 - 1.0`	`1.0`	If colors is not specified, saturation of the automatically-generated data series colors. - Tests: none -
colorValue	`float (0.0 — 1.0)`	`1.0`	If colors is not specified, value of the data series colors, as in hue/saturation/value. (0.0-1.0, default 0.5) - Tests: none -
clickCallback	`function(e, date){ alert(date); }`	`null`	A function to call when a data point is clicked. The function should take two arguments, the event object for the click and the date that was clicked. (default null) - Tests: callback -
zoomCallback	`function(minDate, maxDate, yRanges){}`	`null`	A function to call when the zoom window is changed (either by zooming in or out). minDate and maxDate are milliseconds since epoch. yRanges is an array of [bottom, top] pairs, one for each y-axis. - Tests: callback zoom -
strokeWidth	`integer`	`1`	Width of the data lines. This can be used to increase the contrast or some graphs. - Tests: none -
dateWindow	`[ Date.parse('2006-01-01'), (new Date()).valueOf() ]`	`Full range of the input is shown`	Initially zoom in on a section of the graph. Is of the form [earliest, latest], where earliest/latest are milliseconds since epoch. - Tests: dateWindow link-interaction -
valueRange	`[10, 110]`	`Full range of the input is shown`	Explicitly set the vertical range of the graph to [low, high]. - Tests: none -
labelsSeparateLines	`boolean`	`false`	Put `<br/>` between lines in the label string. Often used in conjunction with labelsDiv. - Tests: customLabel demo -
labelsDiv	`document.getElementById('foo')` or `'foo'`	`null`	Show data labels in an external div, rather than on the graph. This value can either be a div element or a div id. - Tests: label-div -
labelsShowZeroValues	`boolean`	`true`	Show zero value labels in the labelsDiv. - Tests: label-div -
labelsKMB	`true`	`false`	Show K/M/B for thousands/millions/billions on y-axis. - Tests: demo labelsKMB no-range -
labelsKMG2	`true`	`false`	Show k/M/G for kilo/Mega/Giga on y-axis. This is different than - `labelsKMB` in that it uses base 2, not 10. - Tests: labelsKMB -
labelsDivWidth	`250`		Width (in pixels) of the div which shows information on the currently-highlighted points. - Tests: customLabel -
labelsDivStyles	`{}`	`null`	Additional styles to apply to the currently-highlighted points div. For example, { 'font-weight': 'bold' } will make the labels bold. - Tests: border customLabel -
highlightCircleSize	`integer`	`3`	The size in pixels of the dot drawn over highlighted points. - Tests: grid_dot -
drawPoints	`boolean`	`false`	Draw a small dot at each point, in addition to a line going through the point. This makes the individual data points easier to see, but can increase visual clutter in the chart. - Tests: draw-points -
pointSize	`integer`	`1`	The size of the dot to draw on each point in pixels (see drawPoints). A dot is always drawn when a point is "isolated", i.e. there is a missing point on either side of it. This also controls the size of those dots. - Tests: none -
pixelsPerXLabel	`integer`	`60`	Number of pixels to require between each x- and y-label. Larger values will yield a sparser axis with fewer ticks. - Tests: spacing -
pixelsPerYLabel	`integer`	`30`
xAxisLabelWidth	`integer`		Width (in pixels) of the x- and y-axis labels. - Tests: customLabel -
yAxisLabelWidth	`integer`
axisLabelFontSize	`integer`	`14`	Size of the font (in pixels) to use in the axis labels, both x- and y-axis. - Tests: none -
xAxisLabelFormatter	`function(date, granularity)`	`Dygraph.dateAxisFormatter`	Function to call to format values along the x axis. - Tests: xAxisLabelFormatter -
yAxisLabelFormatter	`function(x)`	`yValueFormatter`	- Function used to format values along the Y axis. By default it uses the same as the `yValueFormatter` unless specified. - Tests: yAxisLabelFormatter -
rightGap	`integer`		Number of pixels to leave blank at the right edge of the Dygraph. This makes it easier to highlight the right-most data point. - Tests: none -
errorBars	`boolean`	`false`	Does the data contain standard deviations? Setting this to true alters the input format (see above). - Tests: noise customLabel draw-points fillGraph fractions -
sigma	`integer`		When errorBars is set, shade this many standard deviations above/below each point. - Tests: none -
fractions	`boolean`	`false`	When set, attempt to parse each cell in the CSV file as "a/b", where a and b are integers. The ratio will be plotted. This allows computation of Wilson confidence intervals (see below). - Tests: fractions -
wilsonInterval	`boolean`	`true`	Use in conjunction with the "fractions" option. Instead of plotting +/- N standard deviations, dygraphs will compute a Wilson confidence interval and plot that. This has more reasonable behavior for ratios close to 0 or 1. - Tests: none -
customBars	`boolean`	`false`	When set, parse each CSV cell as "low;middle;high". Error bars will be drawn for each point between low and high, with the series itself going through middle. - Tests: custom-bars zero-series -
drawCallback	`function(dygraph, is_initial)`	`null`	When set, this callback gets called every time the dygraph is drawn. This includes the initial draw, after zooming and repeatedly while panning. The first parameter is the dygraph being drawn. The second is a boolean value indicating whether this is the initial draw. - Tests: callback synchronize -
gridLineColor	`red, blue`	`rgb(128,128,128)`	The color of the gridlines. - Tests: grid_dot -
highlightCallback	`function(event, x, points,row)`	`null`	When set, this callback gets called every time a new point is highlighted. The parameters are the JavaScript mousemove event, the x-coordinate of the highlighted points and an array of highlighted points: `[ {name: 'series', yval: y-value}, … ]` - Tests: callback crosshair -
unhighlightCallback	`function(event)`	`null`	When set, this callback gets called every time the user stops highlighting any point by mousing out of the graph. The parameter is the mouseout event. - Tests: callback crosshair -
underlayCallback	`function(canvas, area, dygraph)`	`null`	When set, this callback gets called before the chart is drawn. It - allows you to draw underneath the chart. See the tests for more - details on how to use this. - Tests: - underlay-callback - highlighted-region - -
strokeWidth	`0.5, 2.0`	`1.0`	The width of the lines connecting data points. - Tests: grid_dot -
width	`integer`	`480`	Width/Height (in pixels) of the chart. If the container div has been explicitly sized, these attributes will be ignored. - Tests: demo link-interaction no-range -
height	`integer`	`320`
stepPlot	`boolean`	`false`	- When set, display the graph as a step plot instead of a line plot. - Tests: steps -
xValueFormatter	`function(x)`		- Function to provide a custom display format the X value for mouseover. -
yValueFormatter	`function(x)`	(Round to 2 decimal places)	- Function to provide a custom display format for the Y value for mouseover. - Tests: yAxisLabelFormatter -
avoidMinZero	`boolean`	`false`	- When set, the heuristic that fixes the Y axis at zero for a data set with the minimum Y value of zero is disabled. - This is particularly useful for data sets that contain many zero values, especially for step plots which may otherwise have lines not visible running along the bottom axis. - Tests: avoidMinZero -
logscale	`boolean`	`false`	- When set for a y-axis, the graph shows that axis in y-scale. Any values less than or equal - to zero are not displayed. - - Not compatible with showZero, and ignores connectSeparatedPoints. Also, showing log scale - with valueRanges that are less than zero will result in an unviewable graph. - - Tests: logscale, - stock -

In addition to the options mentioned above (showRoller, rollPeriod, errorBars, valueRange), there are many others.

For a full list, see the Dygraphs Options Reference page.

Common Gotchas

+ if (typeof(Dygraph.OPTIONS_REFERENCE) === 'undefined') { + this.error('Must include options reference JS for testing'); + } else if (!Dygraph.OPTIONS_REFERENCE.hasOwnProperty(name)) { + this.error('Dygraphs is using property ' + name + ', which has no entry ' + + 'in the Dygraphs.OPTIONS_REFERENCE listing.'); + // Only log this error once. + Dygraph.OPTIONS_REFERENCE[name] = true; + } +//

—" + labels[i] + + "

" + + pt.name + "

" - + point.name + "

+Dygraph.OPTIONS_REFERENCE = // +{ + "xValueParser": { + "default": "parseFloat() or Date.parse()*", + "labels": ["CSV parsing"], + "type": "function(str) -> number", + "description": "A function which parses x-values (i.e. the dependent series). Must return a number, even when the values are dates. In this case, millis since epoch are used. This is used primarily for parsing CSV data. *=Dygraphs is slightly more accepting in the dates which it will parse. See code for details." + }, + "stackedGraph": { + "default": "false", + "labels": ["Data Line display"], + "type": "boolean", + "description": "If set, stack series on top of one another rather than drawing them independently." + }, + "pointSize": { + "default": "1", + "labels": ["Data Line display"], + "type": "integer", + "description": "The size of the dot to draw on each point in pixels (see drawPoints). A dot is always drawn when a point is \"isolated\", i.e. there is a missing point on either side of it. This also controls the size of those dots." + }, + "labelsDivStyles": { + "default": "null", + "labels": ["Legend"], + "type": "{}", + "description": "Additional styles to apply to the currently-highlighted points div. For example, { 'font-weight': 'bold' } will make the labels bold." + }, + "drawPoints": { + "default": "false", + "labels": ["Data Line display"], + "type": "boolean", + "description": "Draw a small dot at each point, in addition to a line going through the point. This makes the individual data points easier to see, but can increase visual clutter in the chart." + }, + "height": { + "default": "320", + "labels": ["Overall display"], + "type": "integer", + "description": "Height, in pixels, of the chart. If the container div has been explicitly sized, this will be ignored." + }, + "zoomCallback": { + "default": "null", + "labels": ["Callbacks"], + "type": "function(minDate, maxDate, yRanges)", + "description": "A function to call when the zoom window is changed (either by zooming in or out). minDate and maxDate are milliseconds since epoch. yRanges is an array of [bottom, top] pairs, one for each y-axis." + }, + "pointClickCallback": { + "default": "", + "labels": ["Callbacks", "Interactive Elements"], + "type": "", + "description": "" + }, + "colors": { + "default": "(see description)", + "labels": ["Data Series Colors"], + "type": "array", + "example": "['red', '#00FF00']", + "description": "List of colors for the data series. These can be of the form \"#AABBCC\" or \"rgb(255,100,200)\" or \"yellow\", etc. If not specified, equally-spaced points around a color wheel are used." + }, + "connectSeparatedPoints": { + "default": "false", + "labels": ["Data Line display"], + "type": "boolean", + "description": "Usually, when Dygraphs encounters a missing value in a data series, it interprets this as a gap and draws it as such. If, instead, the missing values represents an x-value for which only a different series has data, then you'll want to connect the dots by setting this to true. To explicitly include a gap with this option set, use a value of NaN." + }, + "highlightCallback": { + "default": "null", + "labels": ["Callbacks"], + "type": "function(event, x, points,row)", + "description": "When set, this callback gets called every time a new point is highlighted. The parameters are the JavaScript mousemove event, the x-coordinate of the highlighted points and an array of highlighted points: [ {name: 'series', yval: y-value}, … ]" + }, + "includeZero": { + "default": "false", + "labels": ["Axis display"], + "type": "boolean", + "description": "Usually, dygraphs will use the range of the data plus some padding to set the range of the y-axis. If this option is set, the y-axis will always include zero, typically as the lowest value. This can be used to avoid exaggerating the variance in the data" + }, + "rollPeriod": { + "default": "1", + "labels": ["Error Bars", "Rolling Averages"], + "type": "integer >= 1", + "description": "Number of days over which to average data. Discussed extensively above." + }, + "unhighlightCallback": { + "default": "null", + "labels": ["Callbacks"], + "type": "function(event)", + "description": "When set, this callback gets called every time the user stops highlighting any point by mousing out of the graph. The parameter is the mouseout event." + }, + "axisTickSize": { + "default": "3.0", + "labels": ["Axis display"], + "type": "number", + "description": "The size of the line to display next to each tick mark on x- or y-axes." + }, + "labelsSeparateLines": { + "default": "false", + "labels": ["Legend"], + "type": "boolean", + "description": "Put <br/> between lines in the label string. Often used in conjunction with labelsDiv." + }, + "xValueFormatter": { + "default": "(Round to 2 decimal places)", + "labels": ["Axis display"], + "type": "function(x)", + "description": "Function to provide a custom display format for the X value for mouseover." + }, + "pixelsPerYLabel": { + "default": "30", + "labels": ["Axis display", "Grid"], + "type": "integer", + "description": "Number of pixels to require between each x- and y-label. Larger values will yield a sparser axis with fewer ticks." + }, + "annotationMouseOverHandler": { + "default": "null", + "labels": ["Annotations"], + "type": "function(annotation, point, dygraph, event)", + "description": "If provided, this function is called whenever the user mouses over an annotation." + }, + "annotationMouseOutHandler": { + "default": "null", + "labels": ["Annotations"], + "type": "function(annotation, point, dygraph, event)", + "description": "If provided, this function is called whenever the user mouses out of an annotation." + }, + "annotationClickHandler": { + "default": "null", + "labels": ["Annotations"], + "type": "function(annotation, point, dygraph, event)", + "description": "If provided, this function is called whenever the user clicks on an annotation." + }, + "annotationDblClickHandler": { + "default": "null", + "labels": ["Annotations"], + "type": "function(annotation, point, dygraph, event)", + "description": "If provided, this function is called whenever the user double-clicks on an annotation." + }, + "drawCallback": { + "default": "null", + "labels": ["Callbacks"], + "type": "function(dygraph, is_initial)", + "description": "When set, this callback gets called every time the dygraph is drawn. This includes the initial draw, after zooming and repeatedly while panning. The first parameter is the dygraph being drawn. The second is a boolean value indicating whether this is the initial draw." + }, + "labelsKMG2": { + "default": "false", + "labels": ["Value display/formatting"], + "type": "boolean", + "description": "Show k/M/G for kilo/Mega/Giga on y-axis. This is different than labelsKMB in that it uses base 2, not 10." + }, + "delimiter": { + "default": ",", + "labels": ["CSV parsing"], + "type": "string", + "description": "The delimiter to look for when separating fields of a CSV file. Setting this to a tab is not usually necessary, since tab-delimited data is auto-detected." + }, + "axisLabelFontSize": { + "default": "14", + "labels": ["Axis display"], + "type": "integer", + "description": "Size of the font (in pixels) to use in the axis labels, both x- and y-axis." + }, + "underlayCallback": { + "default": "null", + "labels": ["Callbacks"], + "type": "function(canvas, area, dygraph)", + "description": "When set, this callback gets called before the chart is drawn. It details on how to use this." + }, + "width": { + "default": "480", + "labels": ["Overall display"], + "type": "integer", + "description": "Width, in pixels, of the chart. If the container div has been explicitly sized, this will be ignored." + }, + "interactionModel": { + "default": "...", + "labels": ["Interactive Elements"], + "type": "Object", + "description": "TODO(konigsberg): document this" + }, + "xTicker": { + "default": "Dygraph.dateTicker or Dygraph.numericTicks", + "labels": ["Axis display"], + "type": "function(min, max, dygraph) -> [{v: ..., label: ...}, ...]", + "description": "This lets you specify an arbitrary function to generate tick marks on an axis. The tick marks are an array of (value, label) pairs. The built-in functions go to great lengths to choose good tick marks so, if you set this option, you'll most likely want to call one of them and modify the result." + }, + "xAxisLabelWidth": { + "default": "50", + "labels": ["Axis display"], + "type": "integer", + "description": "Width, in pixels, of the x-axis labels." + }, + "showLabelsOnHighlight": { + "default": "true", + "labels": ["Interactive Elements", "Legend"], + "type": "boolean", + "description": "Whether to show the legend upon mouseover." + }, + "axis": { + "default": "(none)", + "labels": ["Axis display"], + "type": "string or object", + "description": "Set to either an object ({}) filled with options for this axis or to the name of an existing data series with its own axis to re-use that axis. See tests for usage." + }, + "pixelsPerXLabel": { + "default": "60", + "labels": ["Axis display", "Grid"], + "type": "integer", + "description": "Number of pixels to require between each x- and y-label. Larger values will yield a sparser axis with fewer ticks." + }, + "labelsDiv": { + "default": "null", + "labels": ["Legend"], + "type": "DOM element or string", + "example": "document.getElementById('foo')or

'foo'",
+    "description": "Show data labels in an external div, rather than on the graph.  This value can either be a div element or a div id."
+  },
+  "fractions": {
+    "default": "false",
+    "labels": ["CSV parsing", "Error Bars"],
+    "type": "boolean",
+    "description": "When set, attempt to parse each cell in the CSV file as \"a/b\", where a and b are integers. The ratio will be plotted. This allows computation of Wilson confidence intervals (see below)."
+  },
+  "logscale": {
+    "default": "false",
+    "labels": ["Axis display"],
+    "type": "boolean",
+    "description": "When set for a y-axis, the graph shows that axis in y-scale. Any values less than or equal to zero are not displayed.\n\nNot compatible with showZero, and ignores connectSeparatedPoints. Also, showing log scale with valueRanges that are less than zero will result in an unviewable graph."
+  },
+  "strokeWidth": {
+    "default": "1.0",
+    "labels": ["Data Line display"],
+    "type": "integer",
+    "example": "0.5, 2.0",
+    "description": "The width of the lines connecting data points. This can be used to increase the contrast or some graphs."
+  },
+  "wilsonInterval": {
+    "default": "true",
+    "labels": ["Error Bars"],
+    "type": "boolean",
+    "description": "Use in conjunction with the \"fractions\" option. Instead of plotting +/- N standard deviations, dygraphs will compute a Wilson confidence interval and plot that. This has more reasonable behavior for ratios close to 0 or 1."
+  },
+  "fillGraph": {
+    "default": "false",
+    "labels": ["Data Line display"],
+    "type": "boolean",
+    "description": "Should the area underneath the graph be filled? This option is not compatible with error bars."
+  },
+  "highlightCircleSize": {
+    "default": "3",
+    "labels": ["Interactive Elements"],
+    "type": "integer",
+    "description": "The size in pixels of the dot drawn over highlighted points."
+  },
+  "gridLineColor": {
+    "default": "rgb(128,128,128)",
+    "labels": ["Grid"],
+    "type": "red, blue",
+    "description": "The color of the gridlines."
+  },
+  "visibility": {
+    "default": "[true, true, ...]",
+    "labels": ["Data Line display"],
+    "type": "Array of booleans",
+    "description": "Which series should initially be visible? Once the Dygraph has been constructed, you can access and modify the visibility of each series using the visibility and setVisibility methods."
+  },
+  "valueRange": {
+    "default": "Full range of the input is shown",
+    "labels": ["Axis display"],
+    "type": "Array of two numbers",
+    "example": "[10, 110]",
+    "description": "Explicitly set the vertical range of the graph to [low, high]."
+  },
+  "labelsDivWidth": {
+    "default": "250",
+    "labels": ["Legend"],
+    "type": "integer",
+    "description": "Width (in pixels) of the div which shows information on the currently-highlighted points."
+  },
+  "colorSaturation": {
+    "default": "1.0",
+    "labels": ["Data Series Colors"],
+    "type": "0.0 - 1.0",
+    "description": "If colors is not specified, saturation of the automatically-generated data series colors."
+  },
+  "yAxisLabelWidth": {
+    "default": "50",
+    "labels": ["Axis display"],
+    "type": "integer",
+    "description": "Width, in pixels, of the y-axis labels."
+  },
+  "hideOverlayOnMouseOut": {
+    "default": "true",
+    "labels": ["Interactive Elements", "Legend"],
+    "type": "boolean",
+    "description": "Whether to hide the legend when the mouse leaves the chart area."
+  },
+  "yValueFormatter": {
+    "default": "(Round to 2 decimal places)",
+    "labels": ["Axis display"],
+    "type": "function(x)",
+    "description": "Function to provide a custom display format for the Y value for mouseover."
+  },
+  "legend": {
+    "default": "onmouseover",
+    "labels": ["Legend"],
+    "type": "string",
+    "description": "When to display the legend. By default, it only appears when a user mouses over the chart. Set it to \"always\" to always display a legend of some sort."
+  },
+  "labelsShowZeroValues": {
+    "default": "true",
+    "labels": ["Legend"],
+    "type": "boolean",
+    "description": "Show zero value labels in the labelsDiv."
+  },
+  "stepPlot": {
+    "default": "false",
+    "labels": ["Data Line display"],
+    "type": "boolean",
+    "description": "When set, display the graph as a step plot instead of a line plot."
+  },
+  "labelsKMB": {
+    "default": "false",
+    "labels": ["Value display/formatting"],
+    "type": "boolean",
+    "description": "Show K/M/B for thousands/millions/billions on y-axis."
+  },
+  "rightGap": {
+    "default": "5",
+    "labels": ["Overall display"],
+    "type": "integer",
+    "description": "Number of pixels to leave blank at the right edge of the Dygraph. This makes it easier to highlight the right-most data point."
+  },
+  "avoidMinZero": {
+    "default": "false",
+    "labels": ["Axis display"],
+    "type": "boolean",
+    "description": "When set, the heuristic that fixes the Y axis at zero for a data set with the minimum Y value of zero is disabled. \nThis is particularly useful for data sets that contain many zero values, especially for step plots which may otherwise have lines not visible running along the bottom axis."
+  },
+  "xAxisLabelFormatter": {
+    "default": "Dygraph.dateAxisFormatter",
+    "labels": ["Axis display", "Value display/formatting"],
+    "type": "function(date, granularity)",
+    "description": "Function to call to format values along the x axis."
+  },
+  "clickCallback": {
+    "snippet": "function(e, date){
  alert(date);
}",
+    "default": "null",
+    "labels": ["Callbacks"],
+    "type": "function(e, date)",
+    "description": "A function to call when a data point is clicked. The function should take two arguments, the event object for the click and the date that was clicked."
+  },
+  "yAxisLabelFormatter": {
+    "default": "yValueFormatter",
+    "labels": ["Axis display", "Value display/formatting"],
+    "type": "function(x)",
+    "description": "Function used to format values along the Y axis. By default it uses the same as the yValueFormatter unless specified."
+  },
+  "labels": {
+    "default": "[\"X\", \"Y1\", \"Y2\", ...]*",
+    "labels": ["Legend"],
+    "type": "array",
+    "description": "A name for each data series, including the independent (X) series. For CSV files and DataTable objections, this is determined by context. For raw data, this must be specified. If it is not, default values are supplied and a warning is logged."
+  },
+  "dateWindow": {
+    "default": "Full range of the input is shown",
+    "labels": ["Axis display"],
+    "type": "Array of two Dates or numbers",
+    "example": "[
  Date.parse('2006-01-01'),
  (new Date()).valueOf()
]",
+    "description": "Initially zoom in on a section of the graph. Is of the form [earliest, latest], where earliest/latest are milliseconds since epoch. If the data for the x-axis is numeric, the values in dateWindow must also be numbers."
+  },
+  "showRoller": {
+    "default": "false",
+    "labels": ["Interactive Elements", "Rolling Averages"],
+    "type": "boolean",
+    "description": "If the rolling average period text box should be shown."
+  },
+  "sigma": {
+    "default": "2.0",
+    "labels": ["Error Bars"],
+    "type": "integer",
+    "description": "When errorBars is set, shade this many standard deviations above/below each point."
+  },
+  "customBars": {
+    "default": "false",
+    "labels": ["CSV parsing", "Error Bars"],
+    "type": "boolean",
+    "description": "When set, parse each CSV cell as \"low;middle;high\". Error bars will be drawn for each point between low and high, with the series itself going through middle."
+  },
+  "colorValue": {
+    "default": "1.0",
+    "labels": ["Data Series Colors"],
+    "type": "float (0.0 - 1.0)",
+    "description": "If colors is not specified, value of the data series colors, as in hue/saturation/value. (0.0-1.0, default 0.5)"
+  },
+  "errorBars": {
+    "default": "false",
+    "labels": ["CSV parsing", "Error Bars"],
+    "type": "boolean",
+    "description": "Does the data contain standard deviations? Setting this to true alters the input format (see above)."
+  },
+  "displayAnnotations": {
+    "default": "false",
+    "labels": ["Annotations"],
+    "type": "boolean",
+    "description": "Only applies when Dygraphs is used as a GViz chart. Causes string columns following a data series to be interpreted as annotations on points in that series. This is the same format used by Google's AnnotatedTimeLine chart."
+  }
+}
+;  //


+// NOTE: in addition to parsing as JS, this snippet is expected to be valid
+// JSON. This assumption cannot be checked in JS, but it will be checked when
+// documentation is generated by the generate-documentation.py script.
+
+// Do a quick sanity check on the options reference.
+(function() {
+  var warn = function(msg) { if (console) console.warn(msg); };
+  var flds = ['type', 'default', 'description'];
+  var valid_cats = [ 
+   'Annotations',
+   'Axis display',
+   'CSV parsing',
+   'Callbacks',
+   'Data Line display',
+   'Data Series Colors',
+   'Error Bars',
+   'Grid',
+   'Interactive Elements',
+   'Legend',
+   'Overall display',
+   'Rolling Averages',
+   'Value display/formatting'
+  ];
+  var cats = {};
+  for (var i = 0; i < valid_cats.length; i++) cats[valid_cats[i]] = true;
+
+  for (var k in Dygraph.OPTIONS_REFERENCE) {
+    if (!Dygraph.OPTIONS_REFERENCE.hasOwnProperty(k)) continue;
+    var op = Dygraph.OPTIONS_REFERENCE[k];
+    for (var i = 0; i < flds.length; i++) {
+      if (!op.hasOwnProperty(flds[i])) {
+        warn('Option ' + k + ' missing "' + flds[i] + '" property');
+      } else if (typeof(op[flds[i]]) != 'string') {
+        warn(k + '.' + flds[i] + ' must be of type string');
+      }
+    }
+    var labels = op['labels'];
+    if (typeof(labels) !== 'object') {
+      warn('Option "' + k + '" is missing a "labels": [...] option');
+      for (var i = 0; i < labels.length; i++) {
+        if (!cats.hasOwnProperty(labels[i])) {
+          warn('Option "' + k + '" has label "' + labels[i] +
+               '", which is invalid.');
+        }
+      }
+    }
+  }
+})();
+//


diff --git a/generate-combined.sh b/generate-combined.sh
index 5694425..2b81f75 100755
--- a/generate-combined.sh
+++ b/generate-combined.sh
@@ -7,6 +7,7 @@ dygraph-canvas.js \
 dygraph.js \
 rgbcolor/rgbcolor.js \
 strftime/strftime-min.js \
+| perl -ne 'print unless m,REMOVE_FOR_COMBINED,..m,/REMOVE_FOR_COMBINED,' \
 > /tmp/dygraph.js
 
 java -jar yuicompressor-2.4.2.jar /tmp/dygraph.js \
diff --git a/generate-documentation.py b/generate-documentation.py
new file mode 100755
index 0000000..3e88088
--- /dev/null
+++ b/generate-documentation.py
@@ -0,0 +1,161 @@
+#!/usr/bin/python
+import json
+import glob
+import re
+
+# Pull options reference JSON out of dygraph.js
+js = ''
+in_json = False
+for line in file('dygraph.js'):
+  if '' in line:
+    in_json = True
+  elif '' in line:
+    in_json = False
+  elif in_json:
+    js += line
+
+# TODO(danvk): better errors here.
+assert js
+docs = json.loads(js)
+
+# Go through the tests and find uses of each option.
+for opt in docs:
+  docs[opt]['tests'] = []
+
+# This is helpful for differentiating uses of options like 'width' and 'height'
+# from appearances of identically-named options in CSS.
+def find_braces(txt):
+  """Really primitive method to find text inside of {..} braces.
+  Doesn't work if there's an unmatched brace in a string, e.g. '{'. """
+  out = ''
+  level = 0
+  for char in txt:
+    if char == '{':
+      level += 1
+    if level >= 1:
+      out += char
+    if char == '}':
+      level -= 1
+  return out
+
+# Find text followed by a colon. These won't all be options, but those that
+# have the same name as a Dygraph option probably will be.
+prop_re = re.compile(r'\b([a-zA-Z0-9]+):')
+for test_file in glob.glob('tests/*.html'):
+  braced_html = find_braces(file(test_file).read())
+  ms = re.findall(prop_re, braced_html)
+  for opt in ms:
+    if opt in docs and test_file not in docs[opt]['tests']:
+      docs[opt]['tests'].append(test_file)
+
+# Extract a labels list.
+labels = []
+for nu, opt in docs.iteritems():
+  for label in opt['labels']:
+    if label not in labels:
+      labels.append(label)
+
+print """
+
+
+  Dygraphs Options Reference
+  
+  
+
+
+"""
+
+print """
+
+Dygraphs
+
+  Home
+  
Data Formats
+  Annotations
+
+Options Reference
+
+  Usage
+"""
+for label in sorted(labels):
+  print '  
%s\n' % (label, label)
+print '
\n\n\n'
+
+def name(f):
+  """Takes 'tests/demo.html' -> 'demo'"""
+  return f.replace('tests/', '').replace('.html', '')
+
+print """
+
+Options Reference
+Dygraphs tries to do a good job of displaying your data without any further configuration. But inevitably, you're going to want to tinker. Dygraphs provides a rich set of options for configuring its display and behavior.
+
+Usage
+You specify options in the third parameter to the dygraphs constructor:
+
g = new Dygraph(div,
+                data,
+                {
+                  option1: value1,
+                  option2: value2,
+                  ...
+                });
+
+
+After you've created a Dygraph, you can change an option by calling the updateOptions method:
+g.updateOptions({
+                  new_option1: value1,
+                  new_option2: value2
+                });
+
+
+And, without further ado, here's the complete list of options:
+"""
+for label in sorted(labels):
+  print '%s\n' % (label, label)
+
+  for opt_name in sorted(docs.keys()):
+    opt = docs[opt_name]
+    if label not in opt['labels']: continue
+    tests = opt['tests']
+    if not tests:
+      examples_html = 'NONE'
+    else:
+      examples_html = ' '.join(
+        '%s' % (f, name(f)) for f in tests)
+
+    if not opt['type']: opt['type'] = '(missing)'
+    if not opt['default']: opt['default'] = '(missing)'
+    if not opt['description']: opt['description'] = '(missing)'
+
+    print """
+  %(name)s

+  %(desc)s

+  Type: %(type)s

+  Default: %(default)s

+  Examples: %(examples_html)s

+  

+  """ % { 'name': opt_name,
+          'type': opt['type'],
+          'default': opt['default'],
+          'desc': opt['description'],
+          'examples_html': examples_html}
+
+
+print """
+
+
+
+"""
+
+# This page was super-helpful:
+# http://jsbeautifier.org/
diff --git a/push-to-web.sh b/push-to-web.sh
index aaf18bd..7aca0f4 100755
--- a/push-to-web.sh
+++ b/push-to-web.sh
@@ -7,10 +7,14 @@ site=$1
 # Produce dygraph-combined.js.
 ./generate-combined.sh
 
+# Generate documentation.
+./generate-documentation.py > docs/options.html
+
 # Copy everything to the site.
 scp tests/*.html tests/*.js tests/*.png $site/tests/ \
 && \
 scp dygraph*.js gadget.xml excanvas.js thumbnail.png screenshot.png docs/* $site/
 
-# Revert changes to dygraph-combined.js
+# Revert changes to dygraph-combined.js and docs/options.html
 git checkout dygraph-combined.js
+rm docs/options.html
diff --git a/tests/independent-series.html b/tests/independent-series.html
new file mode 100644
index 0000000..543f51f
--- /dev/null
+++ b/tests/independent-series.html
@@ -0,0 +1,176 @@
+
+  
+    Independent Series
+    
+    
+    
+    
+    
+    
+  
+  
+    Independent Series
+    By using the connectSeparated attribute, it's possible to display a chart of several time series with completely independent x-values.
+
+    The trick is to specify values for the series at the union of the x-values of all series. For one series' x values, specify null for each of the other series.
+
+    
+    For example, say you had two series:
+    
+    
+    
+    
+    
+      
+        
+        
+        
+        
+      x A
2 2
4 6
6 4
+    
+      
+        
+        
+        
+        
+      x B
1 3
3 7
5 5
+    
+
+    Then you would specify the following CSV or native data:
+    
+    
+    
+    
+    (CSV)
+    X,A,B
+1,,3
+2,2,
+3,,7
+4,6,
+5,,5
+6,4,
+    
+    (native)
+    [
+[1, null, 3],
+[2, 2, null],
+[3, null, 7],
+[4, 6, null],
+[5, null, 5],
+[6, 4, null] ]
+    
+
+    
+
+    Encoding a gap
+    There's one extra wrinkle. What if one of the series has a missing
+    value, i.e. what if your series are something like 
+
+    
+    
+    
+    
+    
+      
+        
+        
+        
+        
+        
+        
+      x A
2 2
4 4
6 (gap)
8 8
10 10
+    
+      
+        
+        
+        
+        
+      x B
1 3
3 5
5 7
+    
+
+    
+    The gap would normally be encoded as a null, or missing value. But when you use connectSeparatedPoints, that has a special meaning. Instead, you have to use NaN. This is a bit of a hack, but it gets the job done. 
+
+    
+
+    
+    
+    
+    
+    (CSV)
+    x,A,B
+1,,3
+2,2,
+3,,5
+4,4,
+5,,7
+6,NaN,
+8,8,
+10,10,
+    
+    (native)
+    [ [1, null, 3],
+  [2, 2, null],
+  [3, null, 5],
+  [4, 4, null],
+  [5, null, 7],
+  [6, NaN, null],
+  [8, 8, null],
+  [10, 10, null] ]
+    
+
+  
+
diff --git a/tests/noise.html b/tests/noise.html
index bdec05f..7a666bf 100644
--- a/tests/noise.html
+++ b/tests/noise.html
@@ -21,14 +21,20 @@
             document.getElementById("div_g"),
             NoisyData, {
               rollPeriod: 7,
-              errorBars: true
+              errorBars: true,
+              legend: 'always'
             }
           );
       g30 = new Dygraph(
             document.getElementById("div_g30"),
             NoisyData().replace(/,/g, "\t"), {
               rollPeriod: 14,
-              errorBars: true
+              errorBars: true,
+              legend: 'always',
+              labelsDivStyles: {
+                'text-align': 'right',
+              },
+              labelsDivWidth: 170
             }
           );