Is there a way of giving Octave a list of values (x, y) and then
getting it to integrate those values? I have over 600 values so an
even better way would be for octave to import a list of values from a
file, and then perform the calculation.
To elaborate on Michael's response... put your data in a file in comma-separated format (or something like it), so
1,2
3,4
etc
Then open Octave and load your data:
data = ""
x=data(:,1); y=data(:,2);
And do the integration with trapz
integral=trapz(x,y)
trapz uses trapezoidal integration, i.e. it joins adjacent points with lines, forming a bunch of trapezoids. There are a million other ways to do it but this is probably the easiest.