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colCombine!,rowCombine!


\begin{usage} colCombine!($A,c_1,j_1,c_2,j_2$)\\ colCombine!($A,c_1,j_1,c_2,j... ...owCombine!($A,f,i_1,i_2$)\\ rowCombine!($A,f,i_1,i_2,j_1,j_2$)\\\end{usage}

\begin{signatures} colCombine!,rowCombine!:& (\%, R, I, R, I) $\to$\ \%\\ col... ...rowCombine!: & (\%, (R,R) $\to$\ R, I, I, I, I) $\to$\ \% \\\end{signatures}



\begin{params} {\em A} & \% & A matrix\\ {\em f} & (R,R) $\to$\ R & An binary... ...htmlref{\texttt{MachineInteger}}{MachineInteger} & row indices\\\end{params}

\begin{descr} The ${j_1}^{{\rm th}}$\ column (resp.~${i_1}^{{\rm th}}$\ row) of... ...e with the function $f$\ defined by $f(x_1,x_2) = c_1 x_1+c_2 x_2$. \end{descr}

Manuel Bronstein 2000-12-13