https://sourceforge.net/p/pyxplot/bugs/7/2011-02-25T14:48:09ZRecent changes to 7: fit command issue2011-02-25T14:48:09Z2011-02-25T14:48:09ZDominic Fordhttps://sourceforge.net/u/dcf21/https://sourceforge.net853f75ed66eb6ac435c2994faf4494df7f80dece

The following issue has been reported by email: Hello Dominic, Hope all is well. I would appreciate if you could provide some assistance please with the following: I have a function which I wish to fit to my data. I get the following error message which I don't understand. I tried to run the same commands in gnuplot but didn't encounter this error \(I did have use log instead of ln in gnuplot to get ln\) pyxplot> height1=1634.66861345;center1=395.011265079;width1=15.8282972557;asym1=0.495963864298 pyxplot> height2=1606.61388466;center2=392.034035427;width2=11.3956998608;asym2=-0.278652616624 pyxplot> f\(x\) = height1\*exp\(-ln\(2\)\*\(ln\(2.0\*asym1\*\(x-center1\)/width1+1\)/asym1\)\*\*2\) + height2\*exp\(-ln\(2\)\*\(ln\(2.0\*asym2\*\(x-center2\)/width2+1\)/asym2\)\*\*2\) pyxplot> fit f\(\) "datafile.txt" u 1:2 via height1,height2,center1,center2,width1,width2,asym1,asym2 Error: The function log\(x\) is not defined at the requested point in parameter space. Any ideas? Thank you. Regards, Will.