Suppose I have a file named tenhistograms.root In this are ten histograms: { h1,h2,h3,h4,h6,h7,h8,h11,h12,h13 } I have a loop that analyses the histograms. However, I want to add a for/else statement so that if a histogram is not present, the loop will not execute, and will simply go on to check the next histogram that does exist. Something like: if(! 'histogram with that particular name in the file tenhistograms.root') cout << "Error!"; else 'the loop' Any ideas, anyone? Kevin Rhodes UW-Madison Amanda Project
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