how to compare two graphs in matlab?

I draw two graphs using plot function in matlab. I want to compare if any cut of two graphs occurs in a picture. How to perform this operation?

Answer 1

[Azzi Abdelmalek]

If data are available, just compare your data, y1==y2 will not work. Try to find when y1-y2 is changing sign

Example

t=0:0.1:10;
y1=sin(t);
y2=cos(t);
plot(t,y1,t,y2);
a=sign(y1-y2);
ii=sort([strfind(a,[-1,1]),strfind(a,[1,-1])])
t(ii)

[mayur]

Thanks A lot man :) It will help my Final year Master project

[Walter Roberson]

ARUN MATHEW comments to Azzi:

it really helps