Hi all. I have been searching over the web for some time, kind of frustrated... I would like to plot the contourplot of a function, and I would like the contourplot to be colored. The rule is that...the negative values should be blue in colors and the positive values should be red in colors, but I also want some gradient between these two limits... I suppose this can be quite easily done, but I still don't know how to do that... Anyone knows? Please help. Thanks.