Re: [Gnuplot-info] Reading formula constants from datafile

[Hans-Bernhard B. <br...@ph...>]

Smyth, Steve wrote:

> Is it possible to read in formula constants form a datafile.  I have
> numerous functions that I would like to plot on the same figure.  All
> of the functions have the same form, but slightly different
> constants.  For simplicity, say the function is f(x)=a*x.  Can "a" be
> read in from a datafile and then f(x) plotted?

Reading one 'a' from a file, then making a plot if it, is trivial: just 
make the file read

	a = 1

then

	load 'file'
	plot f(x)

For more complex cases, e.g. involving a single plot, multiple different 
values of 'a', but only one defined function f, this won't work --- it 
would require the 'plot' command to run two nested loops, one over the 
table of values for 'a', the other over 'x'.   gnuplot doesn't do that.