All Questions
Tagged with performance numpy
239
questions
0
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0
answers
140
views
Algorithm to generate splats from point clouds
I am trying to write a program to generate splats from point clouds from following this paper and this paper.
The function I have to generate 1 splat is here:
...
- 61
4
votes
1
answer
75
views
Optimising compatibility-conflict graph solution - python recursive routine
Background
I'm implementing an algorithm which localises overlapping sound sources using the time-difference-of-arrivals across 3 sensors [1]. Compatible 'triples' (e.g. with only 2 common sensors) ...
- 143
2
votes
1
answer
412
views
Improving the speed of one-hot encoding a list of strings
I've recently developed two functions to functions to essentially convert a list of strings that look something like this (these strings are 101 characters long in my case):
...
- 123
2
votes
1
answer
235
views
Integration loop over multiple doping and temperature levels
I want to perform some calculations on a large dataset. The code can be found below, where I want to calculate the values for 'results_nr' over a large loop (1000 x 910) values. Can you help me out ...
- 21
1
vote
1
answer
75
views
Generate new column based on two columns of dataframe
I need to generate column a_b based on column a and column b of ...
- 177
2
votes
1
answer
255
views
Replace nested for loops when assigning intial conditions in a 4-dimensional array
I create a 4-dimensional (x, y, z, t) array of zero values. I then set the initial values at t = Tmax. To do this, I use a nested for loop. I attempted to improve ...
- 101
3
votes
1
answer
206
views
Numerical integration in Python involving four dimensions
I'm trying to obtain the following S2 from a given S1,
$$
S2(i, j) =
\sum _{k=0} ^i
\sum _{l=0} ^j
S1(k, i-k, j, l)
e^{
-\sqrt{...
- 83
5
votes
1
answer
929
views
Laser physics simulation
This is for a computation for laser physics. The speed is quite slow, which seems to be delayed a lot by the three nested for loops with indices j,k, and l (with comments below). And the computation ...
- 83
1
vote
1
answer
700
views
Exponentially-weighted moving mean and standard deviation of an irregularly-spaced weighted time series
The following numpy/python function computes exponentially-weighted moving mean and standard deviation of an irregularly-spaced weighted time series. I want to make it faster by getting rid of the ...
- 123
1
vote
0
answers
128
views
Solving a linear system with Gaussian Elimination
I decided to implement a solver for linear systems of equations based on the gaussian elimination and reduction to upper triangular form. The gaussian elimination is quite simple to implement but the ...
- 27.5k
4
votes
3
answers
411
views
Pairwise Euclidean distance search algorithm
x and y are two-dimensional arrays with dimensions (AxN) and (BxN), i.e. they have the same number of columns.
I need to get a matrix of Euclidean distances between each pair of rows from x and y.
I ...
2
votes
1
answer
208
views
Generating a matrix with each row having normalized weights
I just asked this question over Stack Over Flow on how to improve my code and reposting it here as someone on Stack Overflow recommended this platform.
I have written two python functions and they are ...
- 21
3
votes
0
answers
66
views
Implementation of a crypto formula in Python
I need to implement in Python the formula in the image. The set B is a set of real numbers \$-1 \le t \le 1\$. Also, \$\mathbb{F}_2\$ is a set with the elements 0 and 1. \$y_i\$ is the \$i\$-th ...
- 139
2
votes
0
answers
139
views
Convolution layer using numpy in python
I'm trying to make a CNN in python using numpy. I have a finished product but it seems that it can be improved. On testing the convolutional layer is the biggest bottleneck
...
- 21
1
vote
0
answers
157
views
Computing the angle between two vectors (vectorized) for small angles and with few copies
I am implementing a function that computes the angle between two vectors when given two n-dimensional arrays and an axis along which to operate. I want to do this with as few copies as possible, and ...
- 1,051