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CD-ROM Today - The Disc! 5
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CD-ROM Today - The Disc (Issue 5)(November 1994).ISO
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factor
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1994-09-21
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616b
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factor:
Syntax: factor ( A )
Description:
The factor function computes the LU factorization of the input
matrix A. Factor returns a list with 3 elements:
lu a matrix containing the LU factors
pvt a vector containing the pivot indices
rcond the inverse of the condition estimate
Factor utilizes the LAPACK subroutines DGETRF, DGECON or
ZGETRF, ZGECON.
Factor returns the results in the above format, so that they
may be conveniently used with backsub for repetitive
solutions. The user-function lu will separate the results from
factor into separate L and U matrices.
See Also: backsub, inv, solve