Hi Mandeep, TH4 classes do not exist in ROOT and we have no plans to add them. Use a 4-dim array instead. I do not understand why you need a 4-d histogram to compute chisq/dof for 2-d fits. Rene Brun Mandeep S. Gill wrote: > > Dear Rootfolk: i hope this is the right place to send this to, it's my > first roottalk posting so: has anyone implemented anything higher than a > 3D histo in Root? > > (The reason i ask is because i wanted to calculate a chisq/dof value for > some 2D fits i'm doing (in RooFitCore, based on Root), and since chisq is > only pre-implemented for 1D in RFC, i wrote the code for doing this myself > based on the GetBinContents function for a TH2F object, but there are only > histos predefined up to a TH3F on the Root class doc page so i'm wondering > if i'll have to either use a different method for getting the chisq, or > extend the functionality myself to higher dim'l TH objects..) > > thanks much- > -Mandeep G. (on Babar)
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