On 5/7/07, Valery Pipin <pip at iszf.irk.ru> wrote:
> The value ((MLIST SIMP) 0.0) is not of type DOUBLE-FLOAT.
> (%i378) F(%pi/4,%pi/4);
> Evaluation took 0.01 seconds (0.01 elapsed) using 335.930 KB.
> (%o378) [- .1694397727137777]
Oh -- looks like you need to return a number instead of
this 1-element list. Maybe G(x,y) := F(x,y)[1] is enough,
then you can plot G.
HTH
Robert