2008/7/7 Ondrej Certik [EMAIL PROTECTED]:
The docs are here:
http://docs.sympy.org/modules/rewriting.html#module-sympy.simplify.cse_main
Stefan, what is the preferred way to document things in numpy? I mean
what kind of REST markup one should use in docstrings, so that it
looks nice in
On Tue, Jul 1, 2008 at 10:38, Ondrej Certik [EMAIL PROTECTED] wrote:
Any progress on this? I think it's time to make anothe release, let's
say on Monday. If you are busy, I propose to put the code that we have
in (with my patch and a comment how to proceed with fixing it
generally) and when
On Sun, Jul 6, 2008 at 12:36 PM, Robert Kern [EMAIL PROTECTED] wrote:
On Tue, Jul 1, 2008 at 10:38, Ondrej Certik [EMAIL PROTECTED] wrote:
Any progress on this? I think it's time to make anothe release, let's
say on Monday. If you are busy, I propose to put the code that we have
in (with my
On Sun, Jul 6, 2008 at 05:45, Ondrej Certik [EMAIL PROTECTED] wrote:
On Sun, Jul 6, 2008 at 12:36 PM, Robert Kern [EMAIL PROTECTED] wrote:
On Tue, Jul 1, 2008 at 10:38, Ondrej Certik [EMAIL PROTECTED] wrote:
Any progress on this? I think it's time to make anothe release, let's
say on
On Sun, Jul 6, 2008 at 07:13, Ondrej Certik [EMAIL PROTECTED] wrote:
diff --git a/sympy/simplify/__init__.py b/sympy/simplify/__init__.py
--- a/sympy/simplify/__init__.py
+++ b/sympy/simplify/__init__.py
@@ -10,3 +10,5 @@ from rewrite import cancel, trim, apart
from rewrite import cancel,
On Sun, Jul 6, 2008 at 2:19 PM, Robert Kern [EMAIL PROTECTED] wrote:
On Sun, Jul 6, 2008 at 07:13, Ondrej Certik [EMAIL PROTECTED] wrote:
diff --git a/sympy/simplify/__init__.py b/sympy/simplify/__init__.py
--- a/sympy/simplify/__init__.py
+++ b/sympy/simplify/__init__.py
@@ -10,3 +10,5 @@
On Sun, Jul 6, 2008 at 07:55, Ondrej Certik [EMAIL PROTECTED] wrote:
On Sun, Jul 6, 2008 at 2:19 PM, Robert Kern [EMAIL PROTECTED] wrote:
On Sun, Jul 6, 2008 at 07:13, Ondrej Certik [EMAIL PROTECTED] wrote:
diff --git a/sympy/simplify/__init__.py b/sympy/simplify/__init__.py
---
On Sun, Jul 6, 2008 at 2:57 PM, Robert Kern [EMAIL PROTECTED] wrote:
On Sun, Jul 6, 2008 at 07:55, Ondrej Certik [EMAIL PROTECTED] wrote:
On Sun, Jul 6, 2008 at 2:19 PM, Robert Kern [EMAIL PROTECTED] wrote:
On Sun, Jul 6, 2008 at 07:13, Ondrej Certik [EMAIL PROTECTED] wrote:
diff --git
On Tue, Jul 1, 2008 at 10:38, Ondrej Certik [EMAIL PROTECTED] wrote:
Any progress on this? I think it's time to make anothe release, let's
say on Monday. If you are busy, I propose to put the code that we have
in (with my patch and a comment how to proceed with fixing it
generally) and when
On Wed, Jun 18, 2008 at 11:50 AM, Robert Kern [EMAIL PROTECTED] wrote:
On Wed, Jun 18, 2008 at 04:32, Ondrej Certik [EMAIL PROTECTED] wrote:
1) commit your patch as is and wait until someone fixes the x-y
problem in a general way
2) commit your patch + my patch + a good comment, that adding
I've implemented an evaluate=False option for Add, Mul, Pow and
functions (see attachment). This could be useful to suppress default
behavior like Sub(x,y) - Add(x,Mul(-1,y)) for code generation etc. As
it happens, I need something like this for evalf testing as well.
Fredrik
On Wed, Jun 18, 2008 at 3:26 PM, Fredrik Johansson
[EMAIL PROTECTED] wrote:
I've implemented an evaluate=False option for Add, Mul, Pow and
functions (see attachment). This could be useful to suppress default
behavior like Sub(x,y) - Add(x,Mul(-1,y)) for code generation etc. As
it happens, I
On Wed, Jun 18, 2008 at 05:44, Ondrej Certik [EMAIL PROTECTED] wrote:
On Wed, Jun 18, 2008 at 11:50 AM, Robert Kern [EMAIL PROTECTED] wrote:
I can probably implement multiple expression support + unit tests +
subtraction preprocessing in a few days time.
Excellent. In this case, let's go
So I think it has become clear what I'm looking to do. There are many
levels of subexpressions, and equations may be defined by many
different subexpressions. For those of you familiar with classical
mechanics, you are probably aware of the explosion of the number of
terms that arises as the
Robert,
The Mathematica link you provided is exactly what I'm trying to do.
I haven't tried your python code yet but after reading it I think it
should work great. I really appreciate your comments and your help!
Thanks,
~Luke
On Jun 16, 12:14 pm, Robert Kern [EMAIL PROTECTED] wrote:
On
Hi Luke,
On Sun, Jun 15, 2008 at 9:00 PM, Luke [EMAIL PROTECTED] wrote:
Ondrej,
I know that Sympy has the capability to do symbolic replacement like
you described. I guess what I'm looking for is more an algorithm to
help identify and automatically collect common subexpressions so that
On Sun, Jun 15, 2008 at 16:11, Ondrej Certik [EMAIL PROTECTED] wrote:
I don't understand which criteria you use to substitute the
subexpressions --- the most frequent subexpression?
Here's some help I got a long time ago when I asked about how to do
this with Python ASTs. I never followed up
On Sun, Jun 15, 2008 at 17:46, Ondrej Certik [EMAIL PROTECTED] wrote:
On Mon, Jun 16, 2008 at 12:10 AM, Robert Kern [EMAIL PROTECTED] wrote:
Actually, that example is not relevant since there is no repeated
subexpression. The idea is to reduce the amount of unnecessarily
repeated
Hi Luke!
On Fri, Jun 13, 2008 at 8:45 PM, Luke [EMAIL PROTECTED] wrote:
I'm working on some code that symbolically generates equations of
motion for mechanical systems. I would like the equations to be
computationally efficient in that they don't repeatedly calculate
quantities that have
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