Rooters, I beleive that I have found a bug in the TF2 drawing function. If I try to draw a TF2 using contours in polar coodinates, I do not get a polar plot. If I draw a surface diagram (or cont4) in polar, all is O.K. I am using ROOT 3.06 on Mandrake Linux release 7.2. Here is an example test = new TF2("foo","[0]*0]*y+[1]*sqrt(y*y*y)*cos(3*x)"); test->SetParameters(0.1,0.001) ; test->SetRange(0,0,2*3.14159265,70); test->Draw("cont1pol"); test->Draw("surf1pol"); Thanks. Ray
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