Multipeak User Function Compile Issue

Share icon

Fri, 02/18/2022 - 07:42 am

I recently upgraded from Igor 6 to Igor 9 for mac. I noticed that Igor 9 cannot recognize my user defined function that uses a convoluted exponential gaussian - even when the Multipeak Fitting analysis package is opened. I used this in Igor 6 for several years and had no problems so long as I loaded in the Multipeak Fitting analysis package.

Were there changes to the Multipeak Fitting package? I'd really appreciate any insights on this. I fit a lot of time-domian data to exponentials convoluted with a Gaussian instrument response. Below is a copy of the function. Unfortunately, I no longer have access to Igor 6 as 32-bit programs no longer run with this mac version. 

#pragma rtGlobals=3        // Use modern global access method and strict wave access.


Function TA_2Exp(w,t) : FitFunc
       Wave w
       Variable t
 
       //CurveFitDialog/ These comments were created by the Curve Fitting dialog. Altering them will
       //CurveFitDialog/ make the function less convenient to work with in the Curve Fitting dialog.
       //CurveFitDialog/ Equation:
       //CurveFitDialog/ f(t)=amp0+(amp1*t1)*fExpGauss(t-t0,1/t1,pw)+(amp2*t2)*fExpGauss(t-t0,1/t2,pw)
       //CurveFitDialog/ End of Equation
       //CurveFitDialog/ Independent Variables 1
       //CurveFitDialog/ t
       //CurveFitDialog/ Coefficients 7
       //CurveFitDialog/ w[0] = amp0
       //CurveFitDialog/ w[1] = pw
       //CurveFitDialog/ w[2] = w0
       //CurveFitDialog/ w[3] = amp1
       //CurveFitDialog/ w[4] = w1
       //CurveFitDialog/ w[5] = amp2
       //CurveFitDialog/ w[6] = w2
 
       return w[0]+(w[3]*w[4])*fExpGauss(t-w[2],1/w[4],w[1])+(w[5]*w[6])*fExpGauss(t-w[2],1/w[6],w[1])
End

 

The newer Multipeak Fit no longer loads the Peak Functions procedure file that your function depends on. Add this to the procedure window:

#include <Peak Functions>

Also, best to paste code into the editor's "Code Snippet". That will get you syntax coloring and will prevent html-style interpretation of your code. I have edited your post to do that.

February 18, 2022 at 09:29 am - Permalink