Handle NaN values correctly in tfplot()

ltfatpy/gabor/tfplot.py

@@ -195,7 +195,7 @@ def tfplot(coef, step, yr, fs=None, dynrange=None, normalization='db',
     # 'dynrange' parameter is handled by converting it into clim
     #  clim overrides dynrange, so do nothing if clim is already specified
     if dynrange and not clim:
-        maxclim = np.max(coef)
+        maxclim = np.nanmax(coef)
         clim = (maxclim - dynrange, maxclim)
 
     # Handle clim by thresholding and cutting