# Change variables with factors while keeping axes the same?

Posted 1 month ago
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 Dear Community, I am not that familiar with Mathematica and therefore I do not know if this is an easy question. I have a very complex formula including two variables z= x and y. In this formula, I want that everywhere where there is x, a 2 multiplied to this (2•x) and everywhere where there is y, 3•y. This goes well until I 3D plot this and my axes take the factor (2 and 3) into account. I want my axes to be x,y,z and not 2x,3y,z. Dividing my axes does not work --> (Plot3D[%87, {x/2, 0, 2}, {y/3, 0, 2}], which seemed logical to me. I don't know how to fix this and I could not find anything on the internet. Therefore my question. Hopefully someone can help me. :)Kind regards, J.
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Posted 1 month ago
 You have f(x,y)=a very complex formula, say F(x_,y_):=BesselI(1,x)+Sin[x]*BesselY(2,y) just for the sake of explicitness. Plot3D accepts a scalar function of two variables, in this case x and y, and a region to plot them.But what do you mean to stretch (or shrink) the z axis by a factor of 3? z is the dependent variable.