NAME Math::Matrix - Multiply and invert Matrices DESCRIPTION The following methods are available: new Constructor arguments are a list of references to arrays of the same length. The arrays are copied. The method returns undef in case of error. \$a = new Math::Matrix ([rand,rand,rand], [rand,rand,rand], [rand,rand,rand]); concat Concatenates two matrices of same row count. The result is a new matrix or undef in case of error. \$b = new Math::Matrix ([rand],[rand],[rand]); \$c = \$a->concat(\$b); transpose Returns the transposed matrix. This is the matrix where colums and rows of the argument matrix are swaped. multiply Multiplies two matrices where the length of the rows in the first matrix is the same as the length of the columns in the second matrix. Returns the product or undef in case of error. solve Solves a equation system given by the matrix. The number of colums must be greater than the number of rows. If variables are dependent from each other, the second and all further of the dependent coefficients are 0. This means the method can handle such systems. The method returns a matrix containing the solutions in its columns or undef in case of error. print Prints the matrix on STDOUT. If the method has additional parameters, these are printed before the matrix is printed. 10/Jul/96 perl 1 MATRIX(1) User Contributed Perl Documentation MATRIX(1) EXAMPLE use Math::Matrix; srand(time); \$a = new Math::Matrix ([rand,rand,rand], [rand,rand,rand], [rand,rand,rand]); \$x = new Math::Matrix ([rand,rand,rand]); \$a->print("A\n"); \$E = \$a->concat(\$x->transpose); \$E->print("Equation system\n"); \$s = \$E->solve; \$s->print("Solutions s\n"); \$a->multiply(\$s)->print("A*s\n"); AUTHOR Ulrich Pfeifer 10/Jul/96 perl 2