From: <r0...@ya...> - 2012-06-12 08:19:40
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Hi there, I have a curve in a datafile that is supposed to be the weighted sum of other two curves. I wish to find the coefficients a,b for such sum so that curve1=curve2*a+curve3*b. I tried with the following fit: fit 0.0 "< paste curve1.dat curve2.dat curve3.dat" u 1:($2-$4*a-$6*b) via a,b but it sticks with the "Singular matrix" error. Is there any workaround for that? Thanks in advance, Roberto |