Specifying range of data from a plot??

This is my plot:

      x=1:5;
     y=rand(size(x));
     lh=line(x,y);
     xp=get(lh,'xdata');
     yp=get(lh,'ydata');

I understand the above code...but now I want to know the values of x when it has a specific relation to y.

How would I code that I want to know the values for x when y is equal or greater to a new variable n?

Something like: xSelect = get(lh,'xdata' if y>=n) ???? not sure how to code what I want.

Thanks for the help!

Answer 1

[Rick Rosson]

   xSelect = x(y>=n);

[Clifford Shelton]

so simple! Thanks! I'm such a beginner it's embarrasing!

[Rick Rosson]

No need to be embarrassed. MATLAB is a very compact and powerful language; the initial learning curve can be challenging if you are used to working with traditional languages like C or Fortran.

[Nom]

Rick, you don't know how much you just helped me out.

Such a simple answer yet I've been trying to fiddle with this for the past hour.

All I wanted to do was select the X and Y range data based on a criteria.

I ended up using:

Xrange = x((x>x(X1) & x<x(X2)));
Yrange = y((x>x(X1) & x<x(X2)));

To find the x values when x is greater than X1 but smaller than X2, and the same with the Yvalues