# mutableMatrix(Ring,ZZ,ZZ) -- make a mutable matrix filled with zeroes

## Synopsis

• Function: mutableMatrix
• Usage:
mutableMatrix(R,nrows,ncols)
• Inputs:
• Optional inputs:
• Dense => ..., default value true, whether the encoding of the matrix should be dense or not: see MutableMatrix
• Outputs:
• , an nrows by ncols mutable matrix filled with zeroes from the ring R

## Description

 i1 : m = mutableMatrix(QQ,10,20) o1 = 0 o1 : MutableMatrix i2 : m_(5,5) = 11/13 11 o2 = -- 13 o2 : QQ i3 : m o3 = | 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 | | 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 | | 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 | | 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 | | 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 | | 0 0 0 0 0 11/13 0 0 0 0 0 0 0 0 0 0 0 0 0 0 | | 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 | | 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 | | 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 | | 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 | o3 : MutableMatrix