On Mon, Aug 10, 2009 at 4:39 PM, Fabian Pedregosa
Izquierdo<[email protected]> wrote:
>
> Ondrej Certik wrote:
>> On Fri, Aug 7, 2009 at 5:29 PM, Ondrej Certik<[email protected]> wrote:
>>> Hi,
>>>
>>> we are having a little sprint in Los Alamos now, with me, Aaron and
>>> Luke. If you want to join us, we are on irc.
>>>
>>> Me and Luke is merging the new trig branch, Aaron is working on dsolve
>>> and related bugs.
>>
>> I'll post a blog after the scipy conference, now I am too busy, but we did:
>>
>> * documentation doctests fixed
>
> Many thanks! This was long needed!
>
>> * pexpect wrappers to maxima
>
> I'm curious what's the motivation behind this. Isn't Sage already
> working in this direction ?

Because it turns out it's really easy to leverage Maxima if it's
present on the system, the pexpect interface is only 160 lines and it
works (there are some small bugs, that we'll fix).

One of sympy's goals is to work very smoothly with other software,
like numpy, scipy, Sage, and now also Maxima, so that you can use the
other packages for what they are (currently) good for and easily
translate expressions between those libraries. Maxima has better
integration (in some cases), trig simplifications, and other things. I
was surprised that factor() for polynomials is now faster in sympy, at
least for those that I tried.

Also, when used in Sage, where maxima is present, sympy should be able
to do the same things as currently Sage can do (through maxima). E.g.
it can be off by default, but by doing something like

solve(...., method="maxima")

it will use maxima instead.

>
>> * couple match bugs fixed
>> * lots of patches reviewed and pushed in
>> * made pydy simplify trig expressions
>> * pexpect wrappers to autolev
>> * visited hot springs
>
> Pictures, please ;-)

Yeah, we have some. Hopefully Luke posts it to his blog.

Ondrej

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