Oscar Lazo wrote:
On 6 ene, 12:23, Jason Grout <jason-s...@creativetrax.com> wrote:
That was an intentionally simple example to illustrate the problem.
Here's something that is more nontrivial:
def f(x,y):
if x>pi:
return y
else:
return -y
spherical_plot3d(f, (x,0,2*pi), (y,0,pi))
I have no idea how to make that work. Functions defined by parts are
surely somthing we'd want. The problem, as i've said is that sage
cannot
multiply functions andsage expressions. That is something better
suited
for more experienced sage programmers than myself...
The code I posted up (based on your original code) at
http://sagenb.org/home/pub/1322/ handles this correctly (I think) if you
manually define the f_is_expression to be False at the top of the
function. Somewhere, there's a nice way to see if f is a symbolic
expression---that test should be done where we now manually set that
variable. On the other hand, maybe we could just try executing the
first block of code, and make an "except" statement if there is an error
that runs the second block of code.
Thanks,
Jason
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