cleanup

[dygraphs.git] / dygraph.js

diff --git a/dygraph.js b/dygraph.js
index e45fc47..a0e224e 100644 (file)
--- a/dygraph.js
+++ b/dygraph.js
@@ -1358,7 +1358,7 @@ Dygraph.numericTicks = function(minV, maxV, self) {
       scale = base_scale * mults[j];
       low_val = Math.floor(minV / scale) * scale;
       high_val = Math.ceil(maxV / scale) * scale;
-      nTicks = (high_val - low_val) / scale;
+      nTicks = Math.abs(high_val - low_val) / scale;
       var spacing = self.height_ / nTicks;
       // wish I could break out of both loops at once...
       if (spacing > pixelsPerTick) break;
@@ -1380,6 +1380,9 @@ Dygraph.numericTicks = function(minV, maxV, self) {
     k_labels = [ "k", "M", "G", "T" ];
   }
 
+  // Allow reverse y-axis if it's explicitly requested.
+  if (low_val > high_val) scale *= -1;
+
   for (var i = 0; i < nTicks; i++) {
     var tickV = low_val + i * scale;
     var absTickV = Math.abs(tickV);