Chief Delphi - Can you call and calculate OPR using vb.net

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Re: Can you call and calculate OPR using vb.net

Quote:

Originally Posted by stingray27 (Post 1222343)

Zip file is attached. Just for future reference though, a module is just a way of organizing code and imports are using external packages to add additional methods and classes to your project.

Thank you. This is extremely helpful.

Re: Can you call and calculate OPR using vb.net

Quote:

Originally Posted by Michael Hill (Post 1222348)

If you want to calculate OPR, especially on large sets of data, I STRONGLY suggest not trying to invert the matrix. It's an extremely computationally intensive operation. However, SOLVING, the matrix is much less so. You can do so by getting your matrix into reduced row echelon form.

For this problem, forming and solving the normal equations with Cholesky factorization is stable and is the fastest method.

The matrix of the normal equations can easily be formed directly, in a single pass through the match data, and the resulting matrix needs no further processing in order to be factored.

Using this method, an end-of-year 2053x2053 system is easily solved in 12 seconds on a 3.4GHz Pentium D with 1GB RAM 32bit WinXP Pro SP3.

More detail is available here.

Re: Can you call and calculate OPR using vb.net

Quote:

Originally Posted by Michael Hill (Post 1222348)

If you want to calculate OPR, especially on large sets of data, I STRONGLY suggest not trying to invert the matrix