Determine if TH1 has variable bins or not

[Wile_E_Coyote]

“Variable bin size” means that the user provided his/her own bin edges. It does NOT matter at all if the provided edges are equidistant or not.

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…