Re: [Gnuplot-info] fit by varying the data

[Hans-Bernhard B. <HBB...@t-...>]

Am 18.06.2019 um 18:53 schrieb Patrick Dupre:
> Hello,
> 
> Can I do this:
> fit a*(x-x0) $DATA u (x=$1):($2*sin(theta)+$3*cos(theta)) via x0,a,theta
                        ^^^^

That assignment operation makes no sense at all.

And no, you can't do that.  The parameters have to influence the
_function_, not the data.  You really wouldn't want to re-read the
entire dataset on every iteration of 'fit', just to update the effect of
parameters on the data.