MATRIX SPL Directory

The Matrix directory contains functions useful in matrix math and matrix manipulations. The following functions are included:

COLNOS	Returns an array of column numbers.
COND	Calculates the condition number of a matrix.
EIG	Computes the Eigenvalues and Eigenvectors of a square matrix.
FLIPLR	Flips the columns of an array.
FLIPUD	Flips the rows of an array
FUNM	Calculates the general matrix function
KRON	Kronecker tensor product of two arrays
LOGM	Calculates the matrix logarithm
LOTRI	Returns the lower triangle of a matrix, including the main diagonal.
LOTRIX	Returns the lower triangle of a matrix, excluding the main diagonal.
NORM	Calculates the norm of a series or array.
NULL	Computes an orthogonal basis for the Null space of an array.
ORTH	Computes an orthonormal basis of an array using SVD.
PINV	Calculates the pseudo inverse of a matrix using SVD.
QR	Calculates the QR decomposition of a matrix.
RANK	Estimates the number of independent rows or columns of an array.
REPMAT	Replicates the rows and columns of an array.
ROWNOS	Returns an array of row numbers.
SQRTM	Calculates the matrix square root
TRACE	Calculates the trace of an array, the sum of the diagonal elements.
TRIL	Lower triangle below a specified diagonal.
TRIU	Upper triangle above a specified diagonal.
UPTRI	Returns the upper triangle of a matrix, including the main diagonal.
UPTRIX	Returns the upper triangle of a matrix, excluding the main diagonal.