nctions. The current c code printer does not target any specialized C
> libraries (but that would be a nice addition!).
>
> Jason
> moorepants.info
> +01 530-601-9791 <(530)%20601-9791>
>
>
> On Sat, Mar 18, 2023 at 3:18 PM brombo wrote:
>
>> I have looked fu
I have looked further and while ccode(expr) can export functions like sin,
cox, exp it cannot export special functions such as bessel, elliptic, etc..
Is there a way to export special functions into c-code?
On Saturday, March 18, 2023 at 9:52:48 AM UTC-4 brombo wrote:
> Does the C c
Does the C code generator generate special function calls with the same
syntax that is used in the gsl (GNU Scientific Library). For example is
the sympy call besselj(nu,z) translated to J(nu,z) etc.?
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Is the following correct? As long as the classes I write have _sympystr
and _latex members the printing using sympy and my objects is transparent.
One more question. I am running Ubuntu 22.04 and have not been able to set
a PYTHONPATH to include the directories with my code in them. Has
I have a sum of terms some of which are multiplied by cos(th). I want to
group these terms together (in parenthesis) and have the terms not
multiplied by cos(th). A complicating issue is that the sum is a numerator
in a fraction. Consider the following expression:
(A*cos(th)+B*cos(th)+C)/D
I understand how to create a custom latex printer for my classes using
_latex(). My question is there an acceptable way for me to create a custom
latex printer for sympy class objects? For example a custom latex printer
for sympy functions or derivatives that would override the sympy printer
I am developing an improved API for differentiation in sympy which is a
class for scalar differential operators (a linear combination of sympy
expressions and partial derivatives). The code (test_dop.py attached)
produces the following output -
[image: test_dop-1.jpg]
To run this code also
In my class I have _latex and _sympystr. Your latex() function uses my
_latex but str() does not use _sympystr I have to define __str__() in my
class to print correctly. How should I use _sympystr to return the correct
string.
def _sympystr(self,printer):
if self.order == 0:
"latex" function to access my _latex and get
the following error message:
File
"/home/brombo/.local/lib/python3.8/site-packages/sympy/printing/printer.py",
line 309, in _print
return getattr(expr, self.printmethod)(self, **kwargs)
TypeError: _latex() takes 1 positional argument b
I calculated an integral g when printed grives:
Piecewise((sin(w/2)/w - 2*cos(w/2)/w**2 + 4*sin(w/2)/w**3, Ne(w, 0)), (2/3,
True)) + 2*Piecewise((-sin(w/2)/(2*w) + cos(w/2)/w**2 + sin(w/2)/w**3 -
sin(3*w/2)/w**3, Ne(w, 0)), (1/6, True))
First, how can I extract from g (without cutting and
Attached is the output of the latest piecewise.py (I got convolution, latex
printing, and Asymptote ploting working)
On Monday, September 5, 2022 at 11:42:49 AM UTC-4 brombo wrote:
> Would this be of any interest to anyone (see and run attached). I have
> written a piecewise function
Would this be of any interest to anyone (see and run attached). I have
written a piecewise function class (not like the one already in sympy)
where the piecewise function is defined on an ordered numerical grid (see
attached). The class in not finished but I can calculate the convolved
Does sympy have the capability to optimally factor (minimum number of
numerical operations) a polynomial or better yet a multinomial for
numerical evaluation. The simple example for a polynomial would be
consider the polynomial -
y = a*x**3+b*x**2+c*x+d
then the optimal factorization
This is a subject that is more general than sympy but is relevant to sympy
and I don't know where else to ask this question. For plotting in sympy
and python for that matter we pretty much make do with mathplotlib. The
software package Asymptote
https://asymptote.sourceforge.io/
is much
After GSOC is over I have someone to help me reintegrate geometric
algebra/calculus
into sympy. The biggest problem is documentation (all of it is in
LaTeX). I know that sympy uses sphinx. Can one use nbsphinx so they
can launch tutorial notebooks directly from the documentation or is the
Is there a simple way to use sympy in google colab?
https://colab.research.google.com/notebooks/welcome.ipynb
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Where are the instructions on how to document sympy code with sphinx?
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Does the installed version of sympy use nbsphinx for documentation -
https://nbsphinx.readthedocs.io/en/0.4.2/
so that the documentation (sphinx) can launch a jupyter notebook? In
documenting my code I would like to use notebook as part of the
documentation.
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To start with I cannot give a simple example using only sympy. I have only
been able to generate this failure using my modules. Below is code and
output showing as simple an example as I can generate with some
diagnostics. If you could suggest any other diagnostics I would appreciate
it.
If you want to test a sympy expression to see if it is a real scalar
(combination real of numbers, functions, symbols, etc.) how would you do it?
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is_real = True
>
> Aaron Meurer
>
> On Sat, Sep 19, 2015 at 2:47 PM, brombo <abrom...@gmail.com >
> wrote:
> > Your method works for a function, but not the derivative of a function -
> >
> > x = Symbol('x',real=True)
> >
> > f = RealFun
suggestions?
On Saturday, September 19, 2015 at 12:58:53 PM UTC-4, brombo wrote:
>
> How do I define a real function of a real variable?
>
> X = symbols('x y z',real=True)
>
> f = Function('f',real=True)(*X)
>
> "real=True" in Function doesn't do anything.
>
How do I define a real function of a real variable?
X = symbols('x y z',real=True)
f = Function('f',real=True)(*X)
"real=True" in Function doesn't do anything.
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Sypmy will be used in courses at AGACSE 2015 in Barcelona during July and
August (http://www-ma2.upc.edu/agacse2015/) with galgebra
(https://github.com/brombo/galgebra) during a course and laboratory session
given by Alan Macdonald
(http://www-ma2.upc.edu/agacse2015/summer-school.html). See
Is there a simple way of removing all absolute values from an expression.
For example if the expression is (Abs(sin(w))/cos(w)) + Abs(w) return
(sin(w)/cos(w)) + w.
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I have implemented a custom matrix printer with _print_MatrixBase(self,
expr). I am running jupyter notebook with the output of
_print_MatrixBase(self, expr) being given by -
def _print_MatrixBase(self, expr):
rows = expr.rows
cols = expr.cols
out_str = ' \\left [
Is there anyway to print a nicely latex formatted matrix in ipython
notebook? When I try I just get the test version printed out while the
latex formatting for the other objects I am printing works fine.
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If I have a sympy expression, g, that is a function of sympy symbols (say
x, y, z, and t) how can I determine that g is not dependent on any other
symbols. The context for this is that I wish to determine if I have a
metric tensor that tensor is a function only of x, y, z, and t and not a
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