MPFX version of ExpModGauss

Hi all,

I'm creating a custom fitting routine using MultiPeakFit2. My fitting model uses exponentially modified Gauss line shapes to fit some spectroscopy data. The fitting is working fine, but I am running into problems getting the peaks out for display back to the user when I call MPFXEMGPeak.

If I execute the following code

make/o testcoefs={300,1,1,.5} //some typical seed coefficients

make/n=128 ywave  //create a y wave to have the shape
setscale /I x, 280,315,"units",ywave

duplicate/o ywave, xwave  //make an explicit x wave to match the dataset
xwave=x

display ywave vs xwave //plot the data

MPFXEMGPeak(testcoefs,ywave,xwave) //attempt to make an EMG out of the data

the last line appears to do nothing at all. No error message, no updating of the wave... just nothing.

If I instead execute

EMGPeak(testcoefs,ywave,xwave) //use the old-style EMG peak function

it appears to work.

Obviously MPFXEMGPeak must be working in some capacity, since it works in the multipeak fit package as distributed; why can't I make it work on its own?? I'm trying to make this routine as generic as possible so I don't want to hard code the old version because I'm looking up MPF results using peakfuncinfo calls.