I've just begun with ROOT, but I have a question about root. - With the object TGraph I can make an array with x and y values, and plot them as a scatter plot. With the object TF2 I can define a 2 dimensional function and plot it in a surface plot or a contour plot. But is it also possible to make a surface plot or contour plot with an array of xyz data-points? Or with a matrix of z data-points? Thanks for any reaction, John Donners
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