span

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span

$\begin{usage} span(M)(a) \end{usage}$

Signature

span: (M:MatrixCategory %) $\to$ M $\to$ Array MachineInteger

$\begin{params} {\em M} & \htmlref{\texttt{MatrixCategory}}{MatrixCategory} \% & A matrix type\\ {\em a} & M & A matrix\\\end{params}$

$\begin{retval} Returns $[c_1,\dots,c_r]$\ where $r$\ is the rank of {\em a} and the span of $a$\ is generated by its columns $c_1,\dots,c_r$. \end{retval}$

See Also

rank

Manuel Bronstein 2000-12-13