The Copy(MV) command returns an identical copy of its argument, MV.  Because this copy is not simply another reference to MV, changes to MV or to the copy do not affect the other.

$\mathrm{with}\left(\mathrm{LinearAlgebra}\right)\:$

$v≔\mathrm{Vector}\left[\mathrm{row}\right]\left(\left[1\,2\,3\right]\,\mathrm{datatype}=\mathrm{float}\left[8\right]\,\mathrm{attributes}=\left[\mathrm{blue}\right]\right)$

$v≔\left[\begin{array}{ccc}1.& 2.& 3.\end{array}\right]$

$w≔\mathrm{Copy}\left(v\right)$

$w≔\left[\begin{array}{ccc}1.& 2.& 3.\end{array}\right]$

$\mathrm{attributes}\left(w\right)$

$\mathrm{blue}$

$w\left[1\right]≔10\:$

$v\left[1\right]$

$1.$

$M≔\mathrm{Matrix}\left(\left[\left[1\,2\,3\right]\,\left[4\,5\right]\,\left[6\right]\right]\,\mathrm{scan}=\mathrm{triangular}\left[\mathrm{upper}\right]\,\mathrm{shape}=\mathrm{triangular}\left[\mathrm{upper}\right]\right)$

$M≔\left[\begin{array}{ccc}1& 2& 3\\ 0& 4& 5\\ 0& 0& 6\end{array}\right]$

$N≔\mathrm{Matrix}\left(M\right)$

$N≔\left[\begin{array}{ccc}1& 2& 3\\ 0& 4& 5\\ 0& 0& 6\end{array}\right]$

$\mathrm{MatrixOptions}\left(M\right)$

$\mathrm{shape}=\left[{\mathrm{triangular}}_{\mathrm{upper}}\right],\mathrm{datatype}=\mathrm{anything},\mathrm{storage}={\mathrm{triangular}}_{\mathrm{upper}},\mathrm{order}=\mathrm{Fortran\_order}$

$\mathrm{MatrixOptions}\left(N\right)$

$\mathrm{shape}=\left[\right],\mathrm{datatype}=\mathrm{anything},\mathrm{storage}=\mathrm{rectangular},\mathrm{order}=\mathrm{Fortran\_order}$

$P≔\mathrm{Copy}\left(M\right)$

$P≔\left[\begin{array}{ccc}1& 2& 3\\ 0& 4& 5\\ 0& 0& 6\end{array}\right]$

$\mathrm{MatrixOptions}\left(P\right)$

$\mathrm{shape}=\left[{\mathrm{triangular}}_{\mathrm{upper}}\right],\mathrm{datatype}=\mathrm{anything},\mathrm{storage}={\mathrm{triangular}}_{\mathrm{upper}},\mathrm{order}=\mathrm{Fortran\_order}$