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). ...
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 ...
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! ...
Python: How to export Sympy image to png? Who has any idea with this? ...