Not sure if the following might be of any help, but it allows for work in 4
coordinate systems: https://github.com/DocNan/SymFields
/c
On Tuesday, October 26, 2021 at 12:40:32 AM UTC-5 Chris Smith wrote:
> You might have copied `a**2 + b**2 + c**2` and called them `p`? You can
> check by
You might have copied `a**2 + b**2 + c**2` and called them `p`? You can
check by typing `type(p)`. If it is an Add then that is what happened
somehow. It's always best to show the actual self-verifying code snippet.
Here is what I used and everything work for me:
```
>>> from sympy.vector
p.dot(p)
a**2 + b**2 + c**2
dot(p,p)
Traceback (most recent call last):
File "", line 1, in
File "C:\Users\Andreas
Schuldei\PycharmProjects\lissajous-achse\venv\lib\site-packages\sympy\physics\vector\functions.py",
line 31, in dot
raise TypeError('Dot product is between two vectors')
I don't see the exception that you showed:
In [9]: O = CoordSys3D('O')
...: r = O.x*O.i + O.y*O.j + O.z*O.k
...: dot(r,r) # this works
...: O.x**2 + O.y**2 + O.z**2
...: from sympy import symbols
...: a, b, c = symbols("a, b, c")
...: p = a*O.i +b*O.j + c*O.k
...: p
...:
I managed to install GAlgebra, and after a bit of tweaking, I managed to
get some lovely output on windows. Thank you for doing this!
You are correct, I also did the cylindrical form first, just because this
is a cable geometry, and it is kind of obvious to do it that way. But the
geometry of
This is beyond what I am involved with regularly, but I wonder if this
would be good in a tutorial for a pertinent module. Thanks @brombo
/c
On Saturday, October 23, 2021 at 8:33:38 PM UTC-5 brombo wrote:
> Attached is the code and pdf output for all three cases.
> On 10/23/21 2:11 AM, Andreas
Attached is the code and pdf output for all three cases.
On 10/23/21 2:11 AM, Andreas Schuldei wrote:
I am putting together the components of a vector field (a magnetic
field, caused by a current in several conductors) in cartesian
coordinates. The field is derived from calculating the
I realized you want 'a' to be a constant vector which my definition of
'a' in cylindrical coordinates is not. I will develop a solution for a
constant 'a'.
On 10/23/21 11:23 AM, Alan Bromborsky wrote:
I don't know if this would help but you problem cried out for
cylindrical coordinates. I
I don't know if this would help but you problem cried out for
cylindrical coordinates. I assumed the vectors a and R were from the
origin and had no theta component (if not let me know and I will run
that case) then this code (snippet) -
def vector_potential_in_cylindrical_coordinates():
A SymPy Vector is constructed algebraically from the unit vectors i, j
and k of the coordinate system. For a vector field you also use the
coordinate system base scalars x, y and z.
In [11]: from sympy.vector import CoordSys3D, dot
In [12]: O = CoordSys3D('O')
In [13]: r = O.x*O.i + O.y*O.j +
I am putting together the components of a vector field (a magnetic field,
caused by a current in several conductors) in cartesian coordinates. The
field is derived from calculating the rotation of its magnetic vector
potential, which can be expressed as
A_z = -Const * dot(r,a)(dot(r,r)
A
You might want to look at this link -
https://galgebra.readthedocs.io/en/latest/
Also if you could show me symbolically (not code) what you are doing
perhaps I could give you an example of how to do it in galgebra.
On 10/22/21 3:15 AM, Andreas Schuldei wrote:
I saw this
I saw this
https://stackoverflow.com/questions/46993819/how-to-create-a-vector-function-in-sympy
which uses Matrix() as a workaround to create a vector. The author says,
that it can not be transformed between coordinate systems, like real
vectors, though.
I need to transform my input and
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