Rui

A minor protection when total points are less than 4, interpolate_2d will complain.

quickstats/plots/general_2D_plot.py

@@ -71,8 +71,9 @@ class General2DPlot(AbstractPlot):
         x, y, z = data[xattrib], data[yattrib], data[zattrib]
         interp_method = self.config['interpolate_method']
         n = self.config['num_grid_points']
-        X, Y, Z = interpolate_2d(x, y, z, method=interp_method, n=n)
-        self.Z = Z
+        if draw_colormesh or draw_contour:
+            X, Y, Z = interpolate_2d(x, y, z, method=interp_method, n=n)
+            self.Z = Z
         if draw_colormesh:
             pcm_styles = combine_dict(self.styles['pcolormesh'])
             if norm is not None: