On 6/11/07, somebody wrote:
> > That's the correct behavior. You're setting the "x" in Maple, not
> > the variable x in SAGE. To set x in SAGE you would do
> > sage: x = maple('5')
> > To see that x was set in maple, do
> > sage: maple.eval('x')
>
>
> and
> sage: matlab('x = 5')
> doesn't set the SAGE x or the matlab x but rather the python x?
The "SAGE x" is the matlab x. But
sage: matlab('x = 5')
should be an error. In general, for any interface R or object
R in almost all of SAGE, you do
x = R(foo)
to make an element of R. In particular, to make an object
in a particular math software program such as maple or mathematica,
you do
x = R(foo),
where foo is often a string and R is maple or mathematica.
You can also just evaluate a line of code in the math software program,
which is what .eval does, e.g.,
matlab.eval('x = 5')
is exactly as if you type "x = 5" into the matlab interpreter (in fact,
that's exactly what happens).
This may be confusing, but it's systematically the case throughout all
SAGE and with all interfaces.
> Sorry, I'm getting a bit confused!
You might want to look at the numerous examples in the reference
manual:
http://www.sagemath.org/doc/html/ref/node125.html
and
http://www.sagemath.org/doc/html/ref/module-sage.interfaces.maple.html
>
> For now I'm not worried about maple though and think I have enough going to
> say something about matlab.
>
> One more question though: should plot(x,y) in a %matlab cell work?
>
> Thanks,
> Randy
>
>
>
--
William Stein
Associate Professor of Mathematics
University of Washington
http://www.williamstein.org
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