## 'matrix()'matrix() |

This information is part of the Modelica Standard Library maintained by the Modelica Association.

Returns the first two dimensions of an array as matrix

matrix(A)

Returns **promote**(A,2), if A is a scalar or vector and
otherwise returns the elements of the first two dimensions
as a matrix. **size**(A,i) = 1 is required for
2 < i ≤ **ndims**(A).

Function **promote**(A,n) fills dimensions of size 1
from the right to array A up to dimension n, where
"n > **ndims**(A)" is required. Let
C = **promote**(A,n), with nA = **ndims**(A),
then

ndims(C) = n,size(C,j) =size(A,j) for 1 ≤ j ≤ nA,size(C,j) = 1 for nA+1 ≤ j ≤ n, C[i_1, ..., i_nA, 1, ..., 1] = A[i_1, ..., i_nA].