$\LaTeX$ command:

<BR><BR>

@Code \newcommand{\Vector}[1]%Number of arguments
@Code {
@Code     &nbsp;&nbsp;&nbsp;\underline { \textbf {#1} }
@Code }


@Code \newcommand{\Matrix}[1]%Number of arguments
@Code {
@Code     &nbsp;&nbsp;&nbsp;\underline {\underline { \textbf {#1} } }
@Code }