FITEXP( num_of_expo)

This command fits the data in memory to a sum of decaying exponentials

The current 1D buffer is used as Y values
The TAB buffer is used as X values

The following equation is fitted :
$P1*exp(-$X*$P2) for a mono exponential
$P1*exp(-$X*$P2) + $P3*exp(-$X*$P4) for a bi exponential
and so forth...

The adapted parameter are stored in the global user variables
$P1..$Pn, if the variables do not exist before the call they
will created with initial value of 1.0, if they exists, their value
will be taken as initial value for the minimization.
Error bars on the parameters are returned in $DP1..$DPn

This command is equivalent to using FITGENE with the equations
given above. It is however MUCH faster.

The number of iterations is controled by ITER
and MINITER. 10 is a good starting value for both of them.

see also : residue iter miniter put linefit linefitd
not tested yet

NPK Documentation, version 0.995 - 2009-10-14