I’ve noticed that if I use TProfile2D::SetBinContent() on an empty bin, it does not have any result until I use SetBinEntries(1) on this bin. Perhaps TProfile2D::SetBinContent() could do SetBinEntries(1) automatically? If someone wants a different number of entries he will have to call SetBinEntries anyway, but for a simple setting of bin value, such a defualt behaviour would be confortable.
Or maybe a new function SetBinContent(content, entries=1)? Just an idea…