Contour plot uncaught ax.dtick error: NaN

[claudericka]

When I create a contour plot with my configuration with small data, the contour plot works fine however when I try it with bigger data set, it throw me an "uncaught ax.dtick error: NaN". Here are some example.
Contour plot with Nan error
Contour plot without error

Thanks.

[etpinard]

Another installment of our contour bug series.

Thanks very much for the report!

[alexcjohnson]

Good catch - the issue is with ncontours: 1, should be an easy fix. In the meantime you may be interested in a new feature (to regular contours anyway): constraint-type contours: #2270