Hello Rooters, I have an histogram with a signal on a top of some background. I would like to fit the signal with a Breit-Wigner and the background with a 2nd ordere polynomial. What I would like to do more precisely is to fit the background SIMULTNEOUSLY to the region below and above the signal. So either I need to know how to create a discontinuous function (not defined in the signal region: putting values to 0 will not do it), either I need to know how to fit 2 regions of the same function at the same time. I really want to fit the regions below and above at the same time, not doing a kind of averaging. Does anybody know how to do that? Thanks Matthieu Guillo University of South Carolina Thomas Jefferson National Laboratory Office 71 trailer 16 Phone: 757-269-5551
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