I've been trying to do a non-linear curve fit where I take a functional form, specify the initial parameters, convolute this with an instrument response function, and then compare the result with actual data. I've tried to do this with a y-script shown below:Data1_D(x)=y0+A1*exp(-(Data1_A- x0)/t1);
fft.conv.convdata$=Data1_E);
fft.conv(Data1_D,Data1_C);
y=Data1_E(x);
...in this case column Data1_A are the x values, Data1_D the values generated from the functional form, Data1_C in the instrument response function, and Data1_E the convolution of the IRF and Data1_D. When I run this script, I keep getting (error 28037: poorly defined params or errors in defined formula).
Has anyone else tried to do this? I'd appreciate any help you guys could pass along...I work in femtosecond time-resolved spectroscopy so if any of you guys have dealt with this before or know anyone who has, I'd be much obliged for the info.
Thanx, CALICO
Fitting Data with convolution to an Instrument Response Function
Posted - 12/17/1998 : 10:21:00 PM
