X-Git-Url: https://adrianiainlam.tk/git/?a=blobdiff_plain;f=dygraph-canvas.js;h=f463e3955e03115237815233260a840a9a62ce35;hb=7aedf6fee4cad9a3fc6de49476fc176e48a090fa;hp=b90695b804b24b00327fd1dd26ae46ff8c50cf52;hpb=d4b89d5690719c1d6e77b61b2afb132dd0cad92d;p=dygraphs.git

diff --git a/dygraph-canvas.js b/dygraph-canvas.js
index b90695b..f463e39 100644
--- a/dygraph-canvas.js
+++ b/dygraph-canvas.js
@@ -32,9 +32,9 @@ DygraphLayout.prototype.addDataset = function(setname, set_xy) {
 
 DygraphLayout.prototype.setAnnotations = function(ann) {
   // The Dygraph object's annotations aren't parsed. We parse them here and
-  // save a copy.
+  // save a copy. If there is no parser, then the user must be using raw format.
   this.annotations = [];
-  var parse = this.attr_('xValueParser');
+  var parse = this.attr_('xValueParser') || function(x) { return x; };
   for (var i = 0; i < ann.length; i++) {
     var a = {};
     if (!ann[i].xval && !ann[i].x) {
@@ -89,8 +89,15 @@ DygraphLayout.prototype._evaluateLimits = function() {
     axis.yrange = axis.maxyval - axis.minyval;
     axis.yscale = (axis.yrange != 0 ? 1.0 / axis.yrange : 1.0);
 
-    axis.ylogrange = Dygraph.log10(axis.maxyval) - Dygraph.log10(axis.minyval);
-    axis.ylogscale = (axis.ylogrange != 0 ? 1.0 / axis.ylogrange : 1.0);
+    if (axis.g.attr_("logscale")) {
+      axis.ylogrange = Dygraph.log10(axis.maxyval) - Dygraph.log10(axis.minyval);
+      axis.ylogscale = (axis.ylogrange != 0 ? 1.0 / axis.ylogrange : 1.0);
+      if (!isFinite(axis.ylogrange) || isNaN(axis.ylogrange)) {
+        axis.g.error('axis ' + i + ' of graph at ' + axis.g +
+            ' can\'t be displayed in log scale for range [' +
+            axis.minyval + ' - ' + axis.maxyval + ']');
+      }
+    }
   }
 };
 
@@ -105,7 +112,7 @@ DygraphLayout.prototype._evaluateLineCharts = function() {
 
     for (var j = 0; j < dataset.length; j++) {
       var item = dataset[j];
-      
+
       var yval;
       if (axis.logscale) {
         yval = 1.0 - ((Dygraph.log10(parseFloat(item[1])) - Dygraph.log10(axis.minyval)) * axis.ylogscale); // really should just be yscale.