next | previous | forward | backward | up | top | index | toc | Macaulay2 web site
Macaulay2Doc :: matrix(Ring,List)

matrix(Ring,List) -- create a matrix from a doubly nested list of ring elements or matrices

Synopsis

Description

All of the vectors, ring elements, or matrices must be defined over the ring R, or a base ring of R.

If a doubly nested list of matrices is given, then ring elements can be used for 1 by 1 blocks, and 0 represents a zero block.

This is essentially the same as matrix(List) together with the specification of the ring.

i1 : R = QQ[a..d];
i2 : f = matrix{{a,b},{c,0}}

o2 = | a b |
     | c 0 |

             2       2
o2 : Matrix R  <--- R
i3 : h = matrix{{f,f},{f,0}}

o3 = | a b a b |
     | c 0 c 0 |
     | a b 0 0 |
     | c 0 0 0 |

             4       4
o3 : Matrix R  <--- R