Get z values for given x and y.

Hello,

I generated a contourplot (say, plot 1) using x, y, z data. Now I've different x and y values that lie on the contourplot and want to get the z values (from plot 1) that correspond to those x and y values (that lies on plot 1, but not the ones used to generate plot 1). I'm an oceanographer, so not very skilled in Matlab, still left no stone unturned to figure this out but to no avail. I believe there has to be a way to do this. I'd highly appreciate if anyone could help. Thank you.

[Sara]

Try looking at this function

griddata

[Image Analyst]

Do you have a complete set of all x and y data? Or just some scattered points? Do you mind showing some code of yours?

Answer 1

[John D'Errico]

You were not very clear about this.

If you generated a contour plot using contour, then interp2 is the tool to interpolate.

If you used scattered data points and then a tool from the FEX to generate the contours (tricontour) then use a tool like triscatteredinterp or griddata.