On Sep 7, 2009, at 7:03 PM, Ondrej Certik wrote:
>
>
>
> On Sep 7, 5:20 pm, Andreas Klöckner
> wrote:
>> Hi there,
>>
>> I'm happy to see that Sympy has come a long way since the last time I
>> looked, and I'd love to ditch Maxima in its favor. In trying to do
>> so,
>> I was looking for a re
If I understand what this function does correctly, it is like algsubs
in Maple. We don't have it yet, but I agree that we are in dire need
of it. See issue 1520 [0]. It shouldn't be too hard to implement.
You would just need to add a flag to subs that would cause something
like (cos(x)*
On Sep 7, 5:20 pm, Andreas Klöckner
wrote:
> Hi there,
>
> I'm happy to see that Sympy has come a long way since the last time I
> looked, and I'd love to ditch Maxima in its favor. In trying to do so,
> I was looking for a replacement for Maxima's tremendously useful
> "ratsubst" function [1],
Hi there,
I'm happy to see that Sympy has come a long way since the last time I
looked, and I'd love to ditch Maxima in its favor. In trying to do so,
I was looking for a replacement for Maxima's tremendously useful
"ratsubst" function [1], but I couldn't find any sign of something
like it in the
You can use your example below as a test. Also, you could try putting
a print statement on line 733 to see what tests use it and modify them
to use negative exponents (by the way, looking at the code, it looks
like someone just miscopied it. Line 735 should match line 733, but
it instead
On Mon, Sep 7, 2009 at 10:37 AM, Ryan Krauss wrote:
> I would be glad to, but I think I need to understand the code better to
> write a valid test. Should that line get executed any time there is 1/term
> in the experssion?
In any case, let's write your test case as a test and then fix that lin
I would be glad to, but I think I need to understand the code better to
write a valid test. Should that line get executed any time there is 1/term
in the experssion?
On Mon, Sep 7, 2009 at 12:32 PM, Aaron S. Meurer wrote:
>
> If you run the coverage script in bin/, you will find that that line
If you run the coverage script in bin/, you will find that that line
is not covered by the test suite, so it is quite possible that it is
wrong. Indeed, if I make the change you specify, the tests still all
pass. Could you create a patch that fixes it and includes a test?
Aaron Meurer
On
Along these same lines, should this substitution work:
In [12]: temp30
Out[12]: -EI*c4*beta**3/L**3
In [13]: temp30.subs(L**2/EI, a)
Out[13]: -EI*c4*beta**3/L**3
I have to invert both inputs to subs to get the result I was hoping for:
In [14]: temp30.subs(EI/(L**2), 1/a)
Out[14]: -c4*beta**3/(
I think I have stumbled onto a bug in core/mul/_eval_subs.
I have the following expression:
In [103]: temp
Out[103]: c3*L**2/(EI*beta**2)
and am trying to substitute a = L**2/EI:
In [104]: temp.subs(L**2/EI, a)
which produces the following traceback:
/home/ryan/git/sympy/sympy/core/mul.pyc in
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