The rtable_indfns(A) function, where A is an Array, Matrix, or Vector, returns a sequence of indexing functions for rtable A.

In the case that A is an Array, this is equivalent to op(1, A).

You can also use MatrixOptions or VectorOptions with the shape parameter to obtain the indexing functions (shape) for Matrices and Vectors, respectively.

The rtable_indfns command is thread-safe as of Maple 15.

For more information on thread safety, see index/threadsafe.

$A≔\mathrm{Array}\left(\mathrm{triangular}\left[\mathrm{upper}\right]\,1..3\,1..4\right)$

$A≔\left[\begin{array}{cccc}0& 0& 0& 0\\ 0& 0& 0& 0\\ 0& 0& 0& 0\end{array}\right]$

$\mathrm{rtable\_indfns}\left(A\right)$

${\mathrm{triangular}}_{\mathrm{upper}}$

$\mathrm{op}\left(1\,A\right)$

${\mathrm{triangular}}_{\mathrm{upper}}$

$M≔\mathrm{Matrix}\left(3\,3\,\mathrm{shape}=\mathrm{symmetric}\right)$

$M≔\left[\begin{array}{ccc}0& 0& 0\\ 0& 0& 0\\ 0& 0& 0\end{array}\right]$

$M\left[1,2\right]≔4$

$M_{1,2}≔4$

$M$

$\left[\begin{array}{ccc}0& 4& 0\\ 4& 0& 0\\ 0& 0& 0\end{array}\right]$

$\mathrm{rtable\_indfns}\left(M\right)$

$\mathrm{symmetric}$