Dear ROOTers,

I encountered a following issue: I would like to make a TProfile2D projection out of TProfile3D with only a subset range of third axis (along which I would like to project - let’s called it *x*). However, this method has no explicit option to set the subset range of *x* axis, like the one available for (e.g.) TProfile2D::ProfileX(). Therefore the resulting 2D projection is made along whole *x* axis range.

The documentation offers a tip, how to resolve it:

To select a bin range along an axis, use TAxis::SetRange, eg h3.GetYaxis()->SetRange(23,56);

The problem with this is, that after setting range of *x* axis, and drawing the resulting projection of *yz*, the range is ignored, i.e. the resulting TProfile2D is always made from projection over the whole *x* axis range (I compared the resulting 2D profile with and without setting the *x* axis range).

Here is the code snippet:

TProfile3D* prof3; // some TProfile3D (in real macro properly loaded)

prof3->GetXaxis()->SetRange(10,20);

TProfile2D* prof3projYZ = prof3->Project3DProfile(“yz”); // projection over x axis

Do you have an idea or hint what could go wrong and the possible way how to solve it?