symmetry is used in its general meaning, from symmetric matrices to Git. As a result you should probably use at least one more tag to describe your case better.
Questions tagged [symmetry]
78 questions
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algorithm to measure symmetricity of 2d vector field
I am looking for a way to "measure" the rotational symmetry of a 2-dimensional vector field.
For example, a rotating vector field with the same center as the frame is "symmetric" as in the following image. On the other hand, if the center is off…
user
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How to create a matrix from a quarter matrix using symmetry
As an instance I have a matrix like this:
A = [1 2;
3 4]
The matrix A is the quarter of a matrix, the full matrix B can be obtained by mirroring A on the vertical and horizontal mirror axes. The resullt should be:
B = [1 2 2 1;
3…
S B
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Mirror/Symmetry effect on video using OpenCV
I want to create a basic video editing application where the user can import video clips and then use symmetry (vertical or horizontal) and offsets on their videos. How feasible is this?
For instance, consider the following…
bananaman
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Weird patterns after drawing reflected object
Hey, I'd like to reflect a triangle over symmetry line parallel to one of the sides using just point coordinates and Mat::at() in OpenCV. So I simply reflect Point2d P over a line that consists triangle vertices P1,P2.
The problem is that I get…
JackieHendrixon
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2 answers
HTML comment missing symmetry
In HTML we usually do comments alike:
Why is the comment not symmetrical as in:
I'm looking for the historical answer.
Skeen
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link asymmetry in process ring
I'm currently working through the ubiquitous process ring in elixir.
The ring is linked, but in the following fashion:
iex(1)> Ring.Worker.create_ring_of_linked_processes(3)
Ring.Worker.create_ring_of_linked_processes(3)
[%{"links" =>…
category
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Exploiting Symmetry in Large Numpy Array
Want to make large array, B, that is made up of a smaller numpy array, A, flipped in different ways:
B[0,:,:,:,:] = A
B[1,:,:,:,:] = B[0,:,::-1,:,:]
B[2:4,:,:,:,:] = B[0:2,:,:,::-1,:]
B[4:8,:,:,:,:] = B[0:4,:,:,:,::-1]
Is there a way to only…
dfreese
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maya python iterating a big number of vertex
I am writing a script in python for maya to swap vertex position from one side to another.
Since I want the flipping to be topology based I am using the topological symmetry selection tool to find the vertex correspondence.
I managed to do that…
maurizio memoli
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Checking Conjugate symmetry in MRI k-space
I have a 2-D k-space data of size 256X256. I learned that K-space data satisfies conjuage symmetry property s(-x) = s*(x). How can I view this symmetry from k-space data using matlab. Though conjugate symmetry is not perfect due phase errors, I feel…
Thara
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fill Numpy array with axisymmetric values
I'm trying to find a fast way to fill a Numpy array with rotation symmetric values. Imagine an array of zeros containing a cone shaped area. I have a 1D array of values and want to rotate it 360° around the center of the array. There is no 2D…
Zac Diggum
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String Symmetry Program
Hey I could use a little bit of help to figure out why my program isn't working. The question is to make a program using recursion that figures if it the text given is a palindrome or not after all the punctuation and white spaces are removed. While…
user2259570
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Are the capabilities python list slicing really asymmetric?
Consider the following code:
>>> a = [0, 1, 2]
>>> for i in range(len(a)):
>>> print a[0:i]
[]
[0]
[0, 1]
However, when I flip the code to take slices from the other end of the list, it no longer works:
>>> for i in range(len(a)):
>>> print…
user1123936
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compare the row and column in a list using python function
Possible Duplicate:
Python - Algorithm to determine if a list is symmetric
I need help writing a Python function - symmetric,that takes as input a list of size n(which is a square matrix) that checks the first row is the same as the first column,…
Fadyboy
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Code for checking the symmetry of a binary tree doesn't work as expected
Given the root of a binary tree, check whether it is a mirror of itself (i.e., symmetric around its center).
It's easy to find a solution that works, but I was wondering why my solution doesn't work.
The way I tried doing this is the following:…
user1190361
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Rotational Symmetry Detection Algorithm in 2D point clouds
I work with images, as a Laue pattern, that consists of spots distributed in an image. The pattern could have a certain symmetry (refelction symmetry, rotational symmetry, inversion center, ...) that we as human easily detect. I am currently working…
Stifterson
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