Hi Tim,
with the preamble you stated --
numer: true;
realonly: true;
f(x,y):=1/(x^4+y^4);
F(x):=quad_qagi(f(x,y),y,0,both)[1];
I find that quoting F(x) like this -- '(F(x)) -- in the plot2d
function call makes Maxima happy. However, F(x) has a singularity
at x=0, so I changed the range to exclude 0.
plot2d ('(F(x)), [x, 0.1, 2]);
That works for me (Maxima 5.9.0 official release w/ CMUCL
and 5.9.1 recent cvs w/ Clisp). Does it work for you too?
Hope this helps -- if you have further questions please
feel free to write again --
Robert Dodier
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