Submatrix
= Submatrix
{wiki}
A submatrix is obtained from a <matrix> by retaining selected rows and selected columns. A principal submatrix of a square matrix retains the same index set for its rows and columns.
= Submatrix
{wiki}
A submatrix is obtained from a <matrix> by retaining selected rows and selected columns. A principal submatrix of a square matrix retains the same index set for its rows and columns.