The Math Forum

Search All of the Math Forum:

Views expressed in these public forums are not endorsed by NCTM or The Math Forum.

Math Forum » Discussions » Software » comp.soft-sys.matlab

Notice: We are no longer accepting new posts, but the forums will continue to be readable.

Topic: 2d data interpolation
Replies: 6   Last Post: Apr 24, 2013 12:24 AM

Advanced Search

Back to Topic List Back to Topic List Jump to Tree View Jump to Tree View   Messages: [ Previous | Next ]

Posts: 3
Registered: 11/29/12
Re: 2d data interpolation
Posted: Nov 30, 2012 2:23 AM
  Click to see the message monospaced in plain text Plain Text   Click to reply to this topic Reply

Yes, sure, these are the command lines
(cen_x is the vector with the x-coordinates, cen_y with the y-coordinates and in dd there are the values I want to interpolate. All of them are vectors with the same length)

[Xi, Yi] = meshgrid(0:600);
Zi = interp2(cen_x, cen_y, dd, Xi, Yi);
figure, mesh(Xi, Yi, Zi);

When I run these lines, I have the message:

??? Error using ==> interp2 at 180
X and Y must be monotonic vectors or matrices produced by MESHGRID.

Error in ==> trial at 12
Zi = interp2(cen_x, cen_y, dd, Xi, Yi);

and I know that cen_x and cen_y are not monotonic, but they can't be monotonic because they are discrete points coming from other lines and, even if I force cen_x to be monotonic, cen_y is not like that.

Thank you again

Point your RSS reader here for a feed of the latest messages in this topic.

[Privacy Policy] [Terms of Use]

© The Math Forum at NCTM 1994-2018. All Rights Reserved.