These functions can be used in external code with OpenMaple or define_external.

MapleSelectIndexed retrieves the element s[ind], where s is a list, set, table, or rtable object. The index is an integer array.  To reference s[1,2], set ind[0] = 1, and ind[1] = 2;.

MapleSelectImaginaryPart returns the imaginary part of s. MapleSelectRealPart returns the real part of s. These commands are equivalent to the Maple Im and Re commands.

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

$\mathrm{dll}≔\mathrm{ExternalLibraryName}\left(''HelpExamples''\right)\:$

$\mathrm{re}≔\mathrm{DefineExternal}\left(''MyRe''\,\mathrm{dll}\right)\:$

$\mathrm{re}\left(3\,\left[1-\mathrm{I}\,2-2\mathrm{I}\,3-3\mathrm{I}\right]\right)$

$\left[1\,2\,3\right]$

$\mathrm{re}\left(3\,\left\{1-\mathrm{I}\,2-2\mathrm{I}\,3-3\mathrm{I}\right\}\right)$

$\left[1\,2\,3\right]$

$\mathrm{re}\left(3\,⟨1-\mathrm{I}\,2-2\mathrm{I}\,3-3\mathrm{I}⟩\right)$

$\left[1\,2\,3\right]$

$\mathrm{re}\left(3\,\mathrm{table}\left(\left[1=1-\mathrm{I}\,2=2-2\mathrm{I}\,3=3-3\mathrm{I}\right]\right)\right)$

$\left[1\,2\,3\right]$