mutableMatrix -- make a mutable matrix

• Usage:

  mutableMatrix m

• Inputs:
  • m, a matrix, a mutable matrix, or a list
• Optional inputs:
  • Dense => ..., default value true, whether the encoding of the matrix should be dense or not: see MutableMatrix
• Outputs:
  • a new mutable matrix whose entries are obtained from m. If m is a list, it should be a doubly nested list (table) of ring elements, all from the same ring.

i1 : f = mutableMatrix {{1,2,3,4}}

o1 = | 1 2 3 4 |

o1 : MutableMatrix

i2 : f_(0,2)

o2 = 3

i3 : f_(0,2) = 33

o3 = 33

i4 : f

o4 = | 1 2 33 4 |

o4 : MutableMatrix

i5 : R = QQ[a..z]

o5 = R

o5 : PolynomialRing

i6 : mutableMatrix genericMatrix(R,3,3)

o6 = | a d g |
     | b e h |
     | c f i |

o6 : MutableMatrix