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| commutation.matrix | Commutation matrix for m by n numeric matrices |
| duplication.matrix | Duplication matrix for n by n matrices |
| elimination.matrix | Elimination matrix for lower triangular matrices |
| frobenius.prod | Frobenius innter product of matrices |
| hadamard.prod | Hadamard product of two matrices |
| hilbert.matrix | Hilbert matrices |
| inverse | Inverse of a square matrix |
| is.numeric.matrix | Determine if argument is a numeric matrix |
| is.positive.definite | Test matrix for positive definiteness |
| is.square.matrix | Test for square matrix |
| is.symmetric.matrix | Test for symmetric numeric matrix |
| lower.triangle | Lower triangle portion of a matrix |
| matrix.rank | Rank of a square matrix |
| matrix.trace | The trace of a matrix |
| pascal.matrix | Pascal matrix |
| set.submatrix | Store matrix inside another matrix |
| shift.down | Shift matrix m rows down |
| shift.left | Shift a matrix n columns to the left |
| shift.right | Shift matrix n columns to the right |
| shift.up | Shift matrix m rows up |
| upper.triangle | Upper triangle portion of a matrix |
| vandermonde.matrix | Vandermonde matrix |
| vec | Vectorize a matrix |
| vech | Vectorize a matrix |