positive-definite Wendland matrix

Further to my blog node/4883 (I wasn't aware of the forums when I started that post. Besides, the forums allow attachments)

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 Here is the my test data(3d points) and theC++ file (rename to *.cpp) I wrote to build the matrix which is written to a file, and can be loaded into matlab or scilab as follows:

 M = load("C:/tmp2/WendlandRBFMatrix.txt");

 Thanks.