[dygraphs.git] / tests / plotter.html

<html>
  <head>
    <title>dygraphs Equation Plotter</title>
    <!--[if IE]>
    <script type="text/javascript" src="../excanvas.js"></script>
    <![endif]-->
    <script type="text/javascript" src="../strftime/strftime-min.js"></script>
    <script type="text/javascript" src="../rgbcolor/rgbcolor.js"></script>
    <script type="text/javascript" src="../dygraph-canvas.js"></script>
    <script type="text/javascript" src="../dygraph.js"></script>
    <script type="text/javascript">
      function plot() {
        var eq = document.getElementById("eq").value;
        eval("fn = " + eq);

        var graph = document.getElementById("graph_div");
        var width = parseInt(graph.style.width);
        var x1 = parseFloat(document.getElementById("x1").value);
        var x2 = parseFloat(document.getElementById("x2").value);
        var xs = 1.0 * (x2 - x1) / width;

        var data = [];
        for (var i = 0; i < width; i++) {
          var x = x1 + i * xs;
          var y = fn(x);
          var row = [x];
          if (y.length > 0) {
            for (var j = 0; j < y.length; j++) {
              row.push(y[j]);
            }
          } else {
            row.push(y);
          }
          data.push(row);
        }

        g = new Dygraph(graph, data);
      }

      function preset() {
        var sel = document.getElementById("presets").selectedIndex;
        var id = document.getElementById("presets").options[sel].id;
        var presets = {
          'id': [ -10, 10, 'function(x) {\n  return x;\n}' ],
          'sine': [ -10, 10, 'function(x) {\n  return Math.sin(x);\n}' ],
          'taylor': [ -3, 3, 'function(x) {\n  return [Math.cos(x), 1 - x*x/2 + x*x*x*x/24];\n}' ],
          'sawtooth': [-10, 10, 'function(x) {\n  var y = 0;\n  for (var i = 1; i < 20; i+=2) {\n    y += Math.sin(i * x)/i;\n  }\n  var final = 1 - 2*(Math.abs(Math.floor(x / Math.PI)) % 2);\n  return [4/Math.PI * y, final];\n}' ]
        };

        if (id == "custom") { return; }
        document.getElementById("x1").value = presets[id][0];
        document.getElementById("x2").value = presets[id][1];
        document.getElementById("eq").value = presets[id][2];
        plot();
      }
    </script>
  </head>
  <body onload="preset()">
    <p><b>Equation: </b><br/>
    <textarea cols="40" rows="10" id="eq">function(x) {
  return [0.1 * x, 0.1 * x + Math.sin(x), 0.1*x + Math.cos(x)];
}</textarea><br/>
<b>Preset functions:</b> <select id=presets onchange="preset()">
<option id=custom>(custom)</option>
<option id=id>Identity</option>
<option id=sine>Sine Wave</option>
<option id=taylor>Taylor series</option>
<option selected id=sawtooth>Sawtooth</option>
</select>
    </p>

    <p><b>x range: </b> <input type=text width="5" id="x1" value="-10" />
    to <input type=text width="5" id="x2" value="10" /></p>
    <p><input type=button value="Plot" onClick="plot()" /></p>

    <div id="graph_div" style="width:1024px; height:400px;"></div>
  </body>
</html>
Commit	Line	Data
6bef45dc DV	1	<html>
	2	<head>
	3	<title>dygraphs Equation Plotter</title>
	4	<!--[if IE]>
a2b2c3a1	5	<script type="text/javascript" src="../excanvas.js"></script>
6bef45dc	6	<![endif]-->
d37dca40 DV	7	<script type="text/javascript" src="../strftime/strftime-min.js"></script>
d37dca40 DV	8	<script type="text/javascript" src="../rgbcolor/rgbcolor.js"></script>
6bef45dc DV	9	<script type="text/javascript" src="../dygraph-canvas.js"></script>
	10	<script type="text/javascript" src="../dygraph.js"></script>
	11	<script type="text/javascript">
	12	function plot() {
	13	var eq = document.getElementById("eq").value;
	14	eval("fn = " + eq);
	15
d16579a0	16	var graph = document.getElementById("graph_div");
6bef45dc DV	17	var width = parseInt(graph.style.width);
	18	var x1 = parseFloat(document.getElementById("x1").value);
	19	var x2 = parseFloat(document.getElementById("x2").value);
	20	var xs = 1.0 * (x2 - x1) / width;
	21
	22	var data = [];
	23	for (var i = 0; i < width; i++) {
	24	var x = x1 + i * xs;
	25	var y = fn(x);
e82114b2 DV	26	var row = [x];
	27	if (y.length > 0) {
	28	for (var j = 0; j < y.length; j++) {
	29	row.push(y[j]);
	30	}
	31	} else {
	32	row.push(y);
	33	}
	34	data.push(row);
6bef45dc DV	35	}
6bef45dc DV	36
e82114b2 DV	37	g = new Dygraph(graph, data);
	38	}
	39
	40	function preset() {
	41	var sel = document.getElementById("presets").selectedIndex;
	42	var id = document.getElementById("presets").options[sel].id;
	43	var presets = {
	44	'id': [ -10, 10, 'function(x) {\n return x;\n}' ],
	45	'sine': [ -10, 10, 'function(x) {\n return Math.sin(x);\n}' ],
	46	'taylor': [ -3, 3, 'function(x) {\n return [Math.cos(x), 1 - xx/2 + xxxx/24];\n}' ],
	47	'sawtooth': [-10, 10, 'function(x) {\n var y = 0;\n for (var i = 1; i < 20; i+=2) {\n y += Math.sin(i * x)/i;\n }\n var final = 1 - 2(Math.abs(Math.floor(x / Math.PI)) % 2);\n return [4/Math.PI y, final];\n}' ]
	48	};
	49
	50	if (id == "custom") { return; }
	51	document.getElementById("x1").value = presets[id][0];
	52	document.getElementById("x2").value = presets[id][1];
	53	document.getElementById("eq").value = presets[id][2];
	54	plot();
6bef45dc DV	55	}
	56	</script>
	57	</head>
e82114b2	58	<body onload="preset()">
6bef45dc DV	59	<p><b>Equation: </b><br/>
6bef45dc DV	60	<textarea cols="40" rows="10" id="eq">function(x) {
e82114b2 DV	61	return [0.1 * x, 0.1 * x + Math.sin(x), 0.1*x + Math.cos(x)];
	62	}</textarea><br/>
	63	<b>Preset functions:</b> <select id=presets onchange="preset()">
	64	<option id=custom>(custom)</option>
	65	<option id=id>Identity</option>
	66	<option id=sine>Sine Wave</option>
	67	<option id=taylor>Taylor series</option>
	68	<option selected id=sawtooth>Sawtooth</option>
	69	</select>
6bef45dc	70	</p>
e82114b2	71
6bef45dc DV	72	<p><b>x range: </b> <input type=text width="5" id="x1" value="-10" />
	73	to <input type=text width="5" id="x2" value="10" /></p>
	74	<p><input type=button value="Plot" onClick="plot()" /></p>
	75
d16579a0	76	<div id="graph_div" style="width:1024px; height:400px;"></div>
6bef45dc DV	77	</body>
6bef45dc DV	78	</html>