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4.9.3 matrix type cast
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Syntax: matrix (expression)matrix (expression, int_n, int_m)-
Type: matrix
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Purpose: Converts expression to a matrix, where expression must be of type int, intmat, intvec, number, poly, ideal, vector, module, or matrix. If int_n and int_m are supplied, then they specify the dimension of the matrix. Otherwise, the size (resp. dimensions) of the matrix are determined by the size (resp. dimensions) of the expression.
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Example: ring r=32003,(x,y,z),dp; matrix(x); → _[1,1]=x matrix(x, 1, 2); → _[1,1]=x → _[1,2]=0 matrix(intmat(intvec(1,2,3,4), 2, 2)); → _[1,1]=1 → _[1,2]=2 → _[2,1]=3 → _[2,2]=4 matrix(_, 2, 3); → _[1,1]=1 → _[1,2]=2 → _[1,3]=0 → _[2,1]=3 → _[2,2]=4 → _[2,3]=0 matrix(_, 2, 1); → _[1,1]=1 → _[2,1]=3