Re: [Gnuplot-info] integrating with loop function

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

Mike L. wrote:
> Gentlemen,
> 
> Is there any way to use the IF - REREAD loop to integrate with the
> trapazoidal rule? 

Using a file loop for that is likely the wrong approach.  Finite 
recursion, as shown in one of our demos, generally works better.

 > If I say a=a+1, an error message appears, "undefined
> variable. a"

Well, so define it before you run the loop file.  A simple

	a = 0

before you load the loop script should work.  You can put some, but not 
all initializations for a loop script inside the script itself.