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
