add fallback in autobin routine

etpinard · etpinard · commit c93dcb1bb124 · 2017-01-06T16:04:52.000-05:00
- so that trying to plot a histogram with categorical sample pts
  on a linear axis result in blank plot instead
  of `ax.dtick` exception.
diff --git a/src/plots/cartesian/axes.js b/src/plots/cartesian/axes.js
@@ -514,6 +514,11 @@ axes.autoBin = function(data, ax, nbins, is2d, calendar) {
                 distinctData.minDiff / msexp, [0.9, 1.9, 4.9, 9.9], true);
         size0 = Math.max(minSize, 2 * Lib.stdev(data) /
             Math.pow(data.length, is2d ? 0.25 : 0.4));
+
+        // fallback if ax.d2c output BADNUMs
+        // e.g. when user try to plot categorical bins
+        // on a layout.xaxis.type: 'linear'
+        if(!isNumeric(size0)) size0 = 0;
     }
 
     // piggyback off autotick code to make "nice" bin sizes
