I’d like to backup Jean-François’s proposal.
The current TGaxis is a simple toy which is useful in some very limited simple cases (btw. that’s nowhere really described so people try to utilize it also for more complex cases -> then one gets reports that the new axis labels do not correspond to the function that defines the axis’s transformation and/or to the drawn histogram / graph).
For the moment, one needs to “scale” the axes values of ones histogram -> see the “Can we shift histogram for several channels?” thread: [url]Can we shift histogram for several channels?