If the Grading object obj had been constructed from numerical data or other Grading objects, then the GetData command returns that information. Otherwise, NULL is returned.

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

$L≔\mathrm{LinearFunction}\left(\left[0\,5\right]\,\left[3\,-2\right]\right)\:$

$\mathrm{GetData}\left(L\right)$

$\left[\mathrm{<<\; GridPoint:\; [0,\; 5]>>}\&comma;\mathrm{<<\; GridPoint:\; [3,\; -2]>>}\right]$

The Grading:-GetData command was introduced in Maple 18.

For more information on Maple 18 changes, see Updates in Maple 18.