Change units of y-axis in a TH2D histogram

[Nyx]

I want to change the units of the y-axis of a TH2D histogram in the way of y = y*c where c is some constant. What is the easiest and cleanest way to do this?

[Wile_E_Coyote]

Can we shift histogram for several channels?

I’m not sure if this is fully kosher, but suit yourself : #include "TAxis.h" #include "TH1.h" #include "TArrayD.h" Double_t ScaleX(Double_t x) { Double_t v; v = 10 * x + 100; // "linear scaling" function example return v; } Double_t ScaleY(Double_t y) { Double_t v; v = 20 * y + 200; // "linear scaling" function example return v; } Double_t ScaleZ(Double_t z) { Double_t v; v = 30 * z + 300; // "linear scaling" function example return v; } void ScaleAxis(TAxis *a, Double_t (…

[Nyx]

Thank you! It worked great. Is there a reason why this is not a built-in function? It is very useful

[Wile_E_Coyote]

Nobody cares.

TAxis FixedToVariable and VariableToFixed proposal

I would like to propose that two methods are added to the TAxis class: FixedToVariable and VariableToFixed. So, an axis which was created as a “fixed bin sizes” one could be converted into a “variable bin sizes” one and the opposite. Note: in case of the “VariableToFixed” method, we would not preserve bin widths, only the “low-edge”, the “upper-edge” and the number of bins would be used / preserved. I guess I would like to have: FixedToVariable(Double_t *xbins = 0) FixedToVariable(Double_t x…

[couet]

@Wile_E_Coyote

Nobody cares.

I think @moneta can help.