Matlab Q&A: Exporting Cosine Graph from .m File

[MatRobert]

Hello,
I am new to Matlab and got a question to ask.

I have created a .m file which plots a cosine graph.
For simplicity, say
time=0:T/999:T;
x=cos(2*pi*time);
plot(time,x);

Then this will create a plot with cos(2piT) with domain of 0~T.

I will like to export this to other .m file so the file can read this graph and calculate the frequency of graph.
But I'm stuck as how I can export this graphical data to other .m file.

Because if I just lookup data on x, it will just give out an array of 1000 values and not knowing its domain(time), I can not calculate the frequency.

Hope this makes sense.

Will appreciate your helps!

 

[mda]

a couple of points:

Firstly the best way to do this is to write the function so that it returns time & x.

Put this at the very top of your m file

function [x,time]=mygenfunc(T)

Save the file as mygenfunc.m

Then call the function from somewhere using

[x,time]=mygenfunc(1);

for example.

If you are dead set on using the graph then the following code may be of use:

c=get(gca,'Children');
time=get(c,'XData');
x=get(c,'YData');