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Problem with Parinfo on Craig B. Markwardt's MPFITPEAK [message #84681]

Wed, 27 June 2012 05:52

Tito
Messages: 16
Registered: March 2012

Junior Member

I am trying to fit Gaussians/Lorentzians with mpfitpeak on witch I know the center, the apmlitude and the Background offset and I want those 3 to be fixed and I am surching only the Sigma width. I tried this:

parinfo = replicate({value:0.0d, fixed:0, limited:[0,0], $
limits:[0.0d,0.0d]}, 4)
parinfo[0].fixed = 1b
parinfo[1].fixed = 1b
parinfo[2].limited[0] = 1b
parinfo[2].limits[0] = 0.005
parinfo[3].fixed = 1b
parinfo[*].value = [1.0d - stell_dep[i],xaxis[index[i]],0.0005, 0.0]

y_fit2 = mpfitpeak(xaxis[minus2+ind:index[i] + ind2],$
1-spec[minus2+ind:index[i] + ind2],$
p2, parinfo = parinfo)

But this jus is not working..... As I see it fix the centroid but all the rest of the parameters are not fixed and I am gettng terrible fit/fits.

Anybody know what I am doing wrong?

All the best!
Trifon

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Problem with Parinfo on Craig B. Markwardt's MPFITPEAK

By: Tito on Wed, 27 June 2012 05:52

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