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

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Giuseppe

Posts: 3
Registered: 11/29/12
Re: 2d data interpolation
Posted: Nov 30, 2012 2:23 AM
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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
Giuseppe



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