I'm porting some matlab functions to scilab. The cool thing is that there is a conversion toolbox that make things very easy.
The problem is I did not find the counter part to the syms function, and the symbolic toolbox in general. (I'd like a port of the Control System Toolbox too, i'm still searching for some functions I'd may need).
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sympy is a great tool for doing units conversions in python:
>>> from sympy.physics import units
>>> 12. * units.inch / units.m
0.304800000000000
You can easily roll your own:
>>> units.BTU = 1055.05585 * units.J
>>> units.BTU
1055.05585*m**2*kg/s**2
However, I cannot implement this into my application unless I can convert degrees ...
hello
I have systems of polynomials, fairly simple polynomial expressions but rather long
to optimize my hand. Expressions are grouped in sets, and in a given set there are common terms in several variables.
I would like to know if there is a computer algebra system, such as Mathematica, Matlab, or sympy, which can optimize multiple p...
I am just starting to play with SymPy and I am a bit surprised by some of its behavior, for instance this is not the results I would expect:
>>> import sympy as s
>>> (-1)**s.I == s.E**(-1* s.pi)
False
>>> s.I**s.I == s.exp(-s.pi/2)
False
Why are these returning False and is there a way to get it to convert from one way of writing a c...
I'm fairly new to sympy and have what might be a basic question. Or I might simply be misinterpreting how sympy is supposed to be used.
Is there a way to create an expression that is not represented by atoms, but by a combination of other expressions?
Ex:
>>> from sympy.physics.units import *
>>> expr1 = m/s
>>> expr2 = mile/hour
>>>...
Hello all - many thanks again to people who have kindly offered help (especially to Mark for his outstanding response to my previous question).
I would like to plot implicit equations (of the form f(x,y)=g(x,y) eg. x^y=y^x) in Matplotlib. Is this possible?
All the best,
Geddes
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Hello - I am working on using Matplotlib to produce plots of implicit equations (eg. y^x=x^y). With many thanks to the help I have already received I have got quite far with it. I have used a contour line to produce the plot. My remaining problem is with formatting the contour line eg width, color and especially zorder, where the contour...
Hello all. Firstly - thanks again for all your help. Sorry not to have accepted the responses to my previous questions as I did not know how the system worked (thanks to Mark for pointing that out!). I have since been back and gratefully acknowledged the kind help I have received.
My question: when plotting a graph with a discontinuity/...
I'm trying to use [SymPy][1] to substitute multiple terms in an expression at the same time. I tried the [subs function][2] with a dictionary as parameter, but found out that it substitutes sequentially.
In : a.subs({a:b, b:c})
Out: c
The problem is the first substitution resulted in a term that can be substituted by the second substi...
What happens internally when I press Enter?
My motivation for asking, besides plain curiosity, is to figure out what happens when you
from sympy import *
and enter an expression. How does it go from Enter to calling
__sympifyit_wrapper(a,b)
in sympy.core.decorators? (That's the first place winpdb took me when I tried inspecting an...
for predefined equations,assigning new values to variables do not changes value of equation.
how can i assign new values to variables so that i will get appropriate value of equation and not the previous one
a,b,c,d,e,f=sympy.symbols('abcdef')
a,b=c,d
e=a+b #equation
print e
c+d #value of eqn
a,b=d,f
print e
c+d #not d+f
...
how to simplify exponents in equations in sympy
from sympy import symbols
a,b,c,d,e,f=symbols('abcdef')
j=(a**b**5)**(b**10)
print j
(a**(b**5))**(b**10) #ans even after using expand simplify
# desired output
a**(b**15)
and if it is not possible with sympy which module should i import in python?
edit
even if i define 'b' as re...
Hello all,
I am hoping to use PyQt to produce an application that will display an equation entered by the user. I had considered matplotlib, but this seems like overkill as I would only be using it to render the latex.
I need to use SymPy anyway, so I was hoping there would be a way to use it to do the rendering also, preferably produc...
Hi, there. May I ask is it possible to save SymPy's image to the image object from PIL Image?
I really need to do this. And so far I 've got no idea around this, please help with this, thank you!
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Python: How to export Sympy image to png?
Who has any idea with this?
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