I am using contour(X,Y,Z), but am getting jagged, non-smooth contour lines, like this:
How do I smooth the contour lines? I've fiddled with trying to use interp2, but am falling down on the use of grid inputs I think.
Any help is much appreciated.
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You DON'T want to smooth the contour lines. That just never works out. Better (but rarely perfect) is to smooth the surface before the contours are built. I say not perfect because any time you do smoothing, you lose information too. Hey, life is tough.
The simple way to smooth the surface is to just use conv2, with a Gaussian blur as a kernel. Choose the width of the gaussian to adjust the amount of smoothing.
You can also use my gridfit code from the file exchange, which allows a choice of the smoothing parameter, thus the amount of smoothing.