INVDISTGRID

Simple, robust gridding using inverse-distance interpolation.

Description

INVDISTGRID Simple, robust gridding using inverse-distance interpolation.
  [Xi,Yi,Zi] = invdistgrid[X,Y,Z,dx] Grids values in vector Z with coordinates X and Y into an array with spacing dx using inverse-distance weighting (default power =2). All data between grid points are used in weighting. If no data exists between points, a NaN is entered. X and Y must be vectors and Z must be of the same length. Z can be an m by n array, with each column a dataset, and Zi will be a three-dimensional array with n layers.
      
  [Xi,Yi,Zi] = invdistgrid[X,Y,Z,dx,p] Replaces the default weighting power 2 with the integer p. The higher the value of p, the more weight will be given to closer data values.

NOTE: You can use FILLNANS or INPAINT_NANS to fill in the NaN values in Zi.

• MATLAB release: MATLAB 7.2 (R2006a)

[Andrew Stevens]

Doesn't work as provided...

??? Undefined function or method 'vsum' for input arguments of type 'double'.

Error in ==> invdistgrid at 39
        D = repmat(vsum(XYZ(fs(k),1) - XYZ(fs(k):fe(k),3),...

[Ian Howat]

This error comes from a call to a non-standard toolbox function. I've uploaded a corrected version. (Make sure the revision is noted on this page before re-uploading).

[James Ramm]