next | previous | forward | backward | up | top | index | toc | Macaulay2 web site
Macaulay2Doc :: Matrix _ Sequence

Matrix _ Sequence -- get entry of matrix

Synopsis

Description

All indexing in Macaulay2 is zero-based, so the indices start at zero.
i1 : M = matrix{{1,2,3},{0,5,6}}

o1 = | 1 2 3 |
     | 0 5 6 |

              2        3
o1 : Matrix ZZ  <--- ZZ
i2 : M_(1,2)

o2 = 6
The matrix may be a a mutable matrix too:
i3 : N = mutableMatrix M

o3 = | . .                           .                                                                                                                                                                                                                                                                                                         |
     | . 157536965545509947330002945 590111429682836384013088036458171329475548163577442375806654842572332476646339702151223594391108362140842145591491414302736888154519184750835190010328501607041345767278579722340059035651541679947061997878715113965150646954064521476304800904327128558746157558389264178397050699748885075053156237313 |

o3 : MutableMatrix
i4 : N_(1,0)

o4 = 0
Entries of mutable matrices can be changed:
i5 : N_(1,0) = 37

o5 = 37
i6 : N

o6 = | . .                           .                                                                                                                                                                                                                                                                                                         |
     | 1 157536965545699613085794305 590111429682836384013088036458171329475548163577442375806654842572332476646339702151223594391108362140842145591491414302736887266262398242905168938904457723369076546290082967418117295445637276058881160045911495648545057108901231655916515511523335012155347163398847885257198371555739655429748162561 |

o6 : MutableMatrix

See also