[Gnuplot-info] Multibranch fitting problem

[Gopesh P. <gop...@ya...>]

Hello All,

I have a question about multibranch fit. If you type
'help fit' in gnuplot and then click multibranch fit
then the following syntax will appear for it:

f(x,y) = (y==0) ? a*exp(-x/tau) : b*exp(-x/tau)
fit f(x,y) 'datafile' using  1:-2:2:3  via a, b, tau

Now I want to fit more than 2 parameters with
multibranch fit, for example, in this way:

f(x,y) = (y==0) ? a*exp(-x/tau) : b*exp(-x/tau):
c*exp(-x/tau) 
fit f(x,y) 'datafile' using  1:-2:2:3  via a,b,c,tau

but it gives error that ';' is expected.
I have 10 indexes in my datafile. So I want it for 10
parameters.

Any suggestions please?

Regards,
Gopesh


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