s, you can use cancel() or factor() (the latter will also
> factor the numerator and denominator).
>
> Aaron Meurer
>
>
> On Thu, Nov 17, 2016 at 8:23 AM, Scott Calabrese Barton
> <koo...@gmail.com > wrote:
> > Unfortunately that image will not render. Her
Unfortunately that image will not render. Here's a link to it:
https://goo.gl/J1wn0P
On Thursday, November 17, 2016 at 8:17:33 AM UTC-5, Scott Calabrese Barton
wrote:
>
> Aaron, thanks, that's definitely the right idea, but doesn't work,
> probably because of simplificatio
Aaron, thanks, that's definitely the right idea, but doesn't work, probably
because of simplification. Here's an example:
What I really want is a k3/k1 term in the denominator that can be
substituted. Any way to achieve this?
On Thursday, November 10, 2016 at 3:54:30 PM UTC-5, Aaron Meurer
wrote:
>
> SymPy expressions are immutable. You have to create a new expression.
> I would recommend something like
>
> def mul_and_div_factor(expr, factor):
> n, d = expr.as_numer_denom()
> return (n*factor)/(d*factor)
>
> Aaron Meurer
>
> On Th
Hi, I wonder if there is an easy way to multiply the numerator and
denominator of a rational expression by the same factor. I'd like to do
this to group terms so that I can make a substitution.
I tried making a function to do this:
def tb(exp,factor):
if exp.func==Mul and
Any insight into the following will be greatly appreciated. Many thanks.
from sympy import *
x = symbols('x', integer=True)
def main(fns, q0):
for fn in fns:
print(fn)
print(fn.subs([x,q0]))
if __name__ == '__main__':
f1=x
f2=x+2
main([f1,f2], 3)
yields
x
Yep. Thanks much, Sudhanshu
Cheers, Scott
On Tuesday, March 24, 2015 at 5:44:47 PM UTC-4, Sudhanshu Mishra wrote:
Hi Scott,
It looks like your subs call is wrong. It should be fn.subs(x, q0)
Hope this helps.
Sudhanshu Mishra
On Wed, Mar 25, 2015 at 3:06 AM, Scott Guthery sgut
at 11:31 AM, Scott scotta_2...@yahoo.com wrote:
Mateuz,
Did might you push your patch to a git fork? Where did your local
patch go?
V/R
Scott
On Oct 6, 1:04 pm, Mateusz Paprocki matt...@gmail.com wrote:
Hi,
On 6 October 2011 11:57, Scott scotta_2...@yahoo.com wrote:
How do
wigner.py
sid@rlrvsxaskeys001:~/Documents/git/sympy-sympy-2d8f7a8$
V/R
Scott
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Mateuz,
Did might you push your patch to a git fork? Where did your local
patch go?
V/R
Scott
On Oct 6, 1:04 pm, Mateusz Paprocki matt...@gmail.com wrote:
Hi,
On 6 October 2011 11:57, Scott scotta_2...@yahoo.com wrote:
How do I coerce integrate(a/(a**2+b*a+b*c*x**2),x) to yield
Scott
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Thank you for pointing me away from the python printer and towards
lambdify.
Cheers,
Scott
On Dec 30, 7:12 am, Vinzent Steinberg
vinzent.steinb...@googlemail.com wrote:
On 29 Dez., 23:29, Scott scotta_2...@yahoo.com wrote:
Is there a clever way to export a Matrix of sympy symbols
characters.
lambdify has the option to use numpy or python.math libraries. Is
this feature hidden somewhere and I simply missed it?
V/R
Scott
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On Oct 5, 11:55 pm, smichr smi...@gmail.com wrote:
On Oct 5, 9:46 pm, Scott spectre...@gmail.com wrote:
On Oct 4, 5:48 pm, Ondrej Certik ond...@certik.cz wrote:
return Add(term for term in expr.as_Add() if term.as_coeff_terms()
Add wants items, not a generator:
return Add
On Oct 4, 5:48 pm, Ondrej Certik ond...@certik.cz wrote:
On Mon, Oct 4, 2010 at 5:40 PM, Scott spectre...@gmail.com wrote:
Hello. I some very large polynomials. Some coefficients are very
small (E-16) and I'd like to get rid of these terms. I found a
previous method with a solution
Hello everyone!
I'm trying to do an integration of a large polynomial. Though it is
large, it should be a pretty simple integration (simple/linear terms
if it is fully expanded). I've run this exact polynomial through
maxima and it computes the output extremely quick (and evern longer
On Oct 5, 10:16 am, Ondrej Certik ond...@certik.cz wrote:
On Tue, Oct 5, 2010 at 9:57 AM, Scott spectre...@gmail.com wrote:
Hello everyone!
I'm trying to do an integration of a large polynomial. Though it is
large, it should be a pretty simple integration (simple/linear terms
is not iterable.
Does anyone have any other ideas of how I can chop off the terms with
very small coefficients?
Thanks,
Scott
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Does the geometric algebra module work interactively?
When I run the following code in an ipython shell it seem to not like
the basis format.
I can run the demo scripts form
http://docs.sympy.org/modules/galgebra/GA/GAsympy.html
with latex output with no trouble.
Cheers,
Scott
from
A python shell behave exactly as the ipython shell did.
In both case MV.setup(basis,metric) is a string rather than an object
with lots of attributes.
I was trying to use GA to run some text book inner outer and geometric
product while I was reading.
Thanks for the help.
Scott
In [25]: g
In [74]: a=(x/sin(x)).series(x, 0, 8)
In [75]: Poly(a.removeO(),x).coeffs
Out[75]: (31/15120, 7/360, 1/6, 1)
The remove0 method is perfect.
The Poly.all_coeffs() does not exist in my sympy 0.6.6 but coeffs did
work.
Cheers Scott
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What is the best way to evaluate x * cot(x) evaluated for x=0-pi/2
with sympy?
Is there a better option than coding the Taylor series approximation?
Also with the sympy that shipped with Ubuntu 10.04 sympy.cot(0) is 0
rather than infinity.
V/R
Scott
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[41]: 1 + x**2/6 + 7*x**4/360 + 31*x**6/15120 + O(x**7)
On Jun 2, 12:41 pm, Aaron S. Meurer asmeu...@gmail.com wrote:
On Jun 2, 2010, at 9:12 AM, Scott wrote:
What is the best way to evaluate x * cot(x) evaluated for x=0-pi/2
with sympy?
I am not too sure what you mean by 0-pi/2, but you
The sinc function in mpmath meets most of my needs. I inspected the
source code for sympy.sin but the algorithm for determining the
approximations of sin(X) escaped my attention.
I am still having trouble find examples of moving between polynomials
and their coefficient arrays.
Cheers
Scott
Below is my fast and dirty approach for making an mpmath friendly
nonlinear system from one configured for scipy.optimize.fsolve.
Thanks for the tips.
import sympy as sy
import numpy
sy.var('x1,x2,a,b')
global a,b
# assume f_list is a long list of functions generated by another
sympy script
#
Ondrej,
I will use your global parameter suggestion in the short term and take
a look at patching the code to allow an 'args' argument like in
scipy.optimize.fsolve .
Vinzent
By residual I meant the system of nonlinear equations I am trying to
find the roots of. Such as [a*x1**2 + x2,
Making my function, F4, play interface with findroot required that I
be more verbose than desired.
(F4 runs under scipy fsolve)
def F4(dof2):
global dof1,m,G,a,dt
args=tuple(dof1)[:-cons]+tuple(dof2)+(m,G,a,dt)
return F3(*args)
dof1 is a list of symbols ,list([x12, z12,
, parameters=(a,b),(0, 0))
matrix(
[['-0.618033988749895'],
['-0.381966011250105']])
V/R
Scott
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Alan,
Thanks
Now that it goes I can investigate if it does what I want.
I was able to run the newest script on sympy 6.4 as a script.
I was unable to manipulate rotor.py or
http://wiki.sympy.org/wiki/Geometric_Algebra_Module#Rotations samples
using isympy7 or ipyhton with the git 7 clone.
On Dec 4, 1:42 pm, Alan Bromborsky abro...@verizon.net wrote:
Alan Bromborsky wrote:
Scott wrote:
.T turns the column vector into a row vector.
The integrands that involve the rotation tensors are functions of t or
x , not both.
int^x1_x0 int ^t0_t1 (dot(del_a(t)).T* R *b ) dt dx
)()
---
NameError Traceback (most recent call
last)
/home/sid/ipython console in module()
NameError: name 'a1' is not defined
On Dec 4, 3:48 pm, Scott scotta_2...@yahoo.com wrote:
When I run the script I
the
del terms yielding a nonlinear system. At this point the tensors are
populated.
On Dec 1, 3:28 pm, Scott scotta_2...@yahoo.com wrote:
Is there a sympy function for making symbolic tensors?
Basically I want to treat 3x3 rotation tensor symbol that is constant
inside of an integral while
sample code
complete? It did not run (with sagge-python and ipyhton from sage)
when I pasted it into a new file.
V/R
Scott
On Dec 3, 11:17 am, Alan Bromborsky abro...@verizon.net wrote:
Alan Bromborsky wrote:
Scott wrote:
My integral has several pieces like this:
int^x1_x0 int ^t0_t1
.
Is there a built in function for converting a 3*1 tensor to a skew
antisymetric cross product matrix then back again?
V/R
Scott
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Where can I find I ubuntu 8.10 AMD_64 sympy.6.deb? I had one and lost
and now I cannot find a replacement.
V/R
Scott
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Problem solved. Found it at the debian.org.
Cheers
Scott
Scott wrote:
Where can I find I ubuntu 8.10 AMD_64 sympy.6.deb? I had one and lost
and now I cannot find a replacement.
V/R
Scott
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veversion .6.3
Cheers
Scott
def F0(dof,d_dof,U,dt):
h1=dof[0];theta1=dof[1];v_h1=dof[2];v_theta1=dof[3]
delta_h=d_dof[0];delta_theta=d_dof[1];delta_v_h=d_dof
[2];delta_v_theta=d_dof[3]
res=-delta_v_h/2 - delta_v_theta/20 + dt*(-2*h1/25 - delta_h/25 -
3*U
How can i create one symbol such that the pprint and/or latex output
will be merged special characters?
What is the X such that:
x= symbol('X')
pprint(x) produce standard output equivilent that looks like$ \delta
\theta_1 $ in tex
aka the variation of theta subscript 1
Thanks
Scott
How do you bend subs syntax to substitute and and array of symbols?
a,b,x,y=symbols('a','b','x','y')
q=a,b
p=x,y
f= a**2 + b
?? f.subs({p:q})??
x**2+y
On Nov 11, 1:31 pm, llarsen [EMAIL PROTECTED] wrote:
It seems like it would be nice where possible to make the sympy syntax
as natural as
I meant deltatheta_1
or like \delta\theta_1 in latex
and also omega_theta , omege subscript theta .
Thanks
Scott
On Nov 25, 12:29 pm, Ondrej Certik [EMAIL PROTECTED] wrote:
On Tue, Nov 25, 2008 at 3:44 PM, Scott [EMAIL PROTECTED] wrote:
How can i create one symbol such that the pprint
Either syntax , I currently use version 0.6.2 but will upgrade to
0.6.3 as soon as I find .deb file. My goal is to swap easy to type
sympols with symbol that pprint well.
V/R
Scott
On Nov 25, 12:27 pm, Ondrej Certik [EMAIL PROTECTED] wrote:
Hi Scott,
On Tue, Nov 25, 2008 at 4:25 PM, Scott
.
http://en.wikipedia.org/wiki/Phonetic_Extensions perhaps.
As for merging 2 greek symbols in the absence of an LaTeX type
wizardry, I will do without. I will look at the pprint cod to try to
glean the mark characters sucha as _ .
Thanks
Scott
On Nov 25, 6:17 pm, Ondrej Certik [EMAIL PROTECTED
I'll give your extended latex printer a go. My goal is in the theme
of making pprint prettier and being able to have my script output
match the conventions of the people I work with.
Thanks
On Nov 25, 6:54 pm, Alan Bromborsky [EMAIL PROTECTED] wrote:
Ondrej Certik wrote:
2008/11/25 Scott
Does subs have a list of vector functionallity?
f.subs(p,q) where p is a list and q is a list?
I believe the answer is no.
It sounds like subs only operates term wise. There perhaps an
arraysubs or vsubs type command?
V/R
Scott
On Nov 25, 6:21 pm, Ondrej Certik [EMAIL PROTECTED] wrote
My apologies, I think the dict(zip(p,q)) will solve my problem.
Cheers, Scott
On Nov 25, 8:24 pm, Scott [EMAIL PROTECTED] wrote:
Does subs have a list of vector functionallity?
f.subs(p,q) where p is a list and q is a list?
I believe the answer is no.
It sounds like subs only operates term
What simplify expand, reduce and reduce type functions are available
in sympy?
Where in the docs is this sort of information?
Thanks
Scott
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the subs attribute.
Is there a better way to handle this than a lot of
Matrix(diff(Matrix(rdotarray).subs(xdot,s)[:],s)).subs(s,xdot) ?
Where in the Docs am I most likely to find the answers to my question?
I am using sympy 6.2 now.
Thanks again
Scott
diff((z*zdot).subs(xdot, s), s)
On Oct
What is the sympy translation of the following Mathematica syntax?
When I try to code this in sage or sympy xdot and zdot remain as a
diff object and I cannot us them in symbolic manifulations. My sympy
version is 5.15 (ubuntu 8.10) or whatever is embedded in sage 3.1.2.
V/R
Scott
x=q[t];
z
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