Rene,
That suggestion works very well.
What drove me crazy is believing that all information could be gotten through the TAxis class. However, using that thought it required different treatment for X vs Y type axes. X axis use the the GetMinBin, and Y axis uses h->GetMinimum.
So your solution ends up being much better in general.
Thank you!
I do have one additional question which I don’t think has a simple answer, I have looked at Oliver’s replies to other messages about inverting axes. I can invert the axis and then index the array data in reverse. However, is there a mirror type function for the Y-axis that preserves the array but inverts the axis and plotting?
Chris