Re: [Gnuplot-info] How to plot multiple fit functions in a single box

[Norwid B. <nb...@ya...>]

Dear Rekha,

my understanding is that you have one file of data and the script may
perform the fits sequentially (using 1:2, using 1:3, using 1:4, etc.).
The structure of the underlying function seems to be the same for all of
them, too, f(x) = (a0 + a1/x).

May renaming the functions be an option for you, e.g. f1(x), f2(x), f3(x),
thus creating to discernible fits?  I speculate this requires some change
in the script used (the example covers only two data):

f1(x) = (a0 + a1/x)
fit f1(x) 'test.data' using 1:2 via a0,a1
plot 'test.data' using 1:2 w points pt 1 t  ,  f1(x) t sprintf("K_{fit} =
a_0 +  a_1/T", a0)

f2(x) = (a0 + a1/x)
fit f2(x) 'test.data' using 1:3 via a0,a1
plot  'test.data' using 1:3 w points pt 1 t   ,  f2(x) t sprintf("K_{fit} =
a_0 +  a_1/T", a0)

Using the integer count may yield a script easier to maintain and expand
than using a set of functions named with changing letters, e.g. f(x), g(x),
h(x), etc.

If so, because of similarity in these blocks and the predictable changes
between them, maybe this may be parameterized once; you would have one
block of definition only.  When calling for this function, its sole variable
then were n to perform n fits / plot n curves; there wouldn't be a need
to write n blocks (dry versus wet programming principle).

Norwid