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matrix -- make a matrix

Description

The simplest use of this function is to define a matrix by giving a doubly nested list of ring elements. One may also explicitly provide the ring, or give a matrix as a doubly-nested list of matrices.

i1 : matrix{{1,2,3},{4,5,6}}

o1 = | 1 2 3 |
     | 4 5 6 |

              2        3
o1 : Matrix ZZ  <--- ZZ

i2 : R = QQ[x,y,z];

i3 : matrix{{x,0,2},{1,2,y}}

o3 = | x 0 2 |
     | 1 2 y |

             2       3
o3 : Matrix R  <--- R

The map function provides other methods to define a matrix.

Ways to use `matrix` :

matrix(List) -- create a matrix from a doubly-nested list of ring elements or matrices
matrix(Matrix) -- the matrix between generators
matrix(MutableMatrix) -- make a matrix from a mutable one
matrix(Ring,List) -- create a matrix from a doubly nested list of ring elements or matrices
matrix(RingMap) -- the matrix associated to a ring map
matrix(String) -- make a matrix using classic Macaulay syntax