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I have written a deliberately pretty simple class that wraps a std::vector to basically make it capable of self-populate itself with random generated numbers, simply to be able to test the result of some sorting algorithms that I'm working on.
This is only a hobby project, it is not production...
I finished a program to do connected component analysis using union - find algorithm. Is it true that the complexity of the code is N logN where N is the total number of pixels( 512x512 by example, not 512). Is there anyway to improve the performance?
import cv2
import numpy as np
import random
...
I am writing a text classifier and in order to do so I need TF/IDF values per every word of my signle text. Then I need to use the cosine similarity:
\$similarity = cos(\theta) = \frac{A \times B}{\lVert A \lVert \lVert B \lVert} = \frac{\overset{n}{\underset{i=1}{\LARGE\Sigma}}A_i \times B_i}{...
I need to do a few hundred million euclidean distance calculations every day in a Python project.
Here is what I started out with:
#!/usr/bin/python
import numpy as np
def euclidean_dist_square(x, y):
diff = np.array(x) - np.array(y)
return np.dot(diff, diff)
This is quite fast and I...
To see how any of the formulas were made in any question or answer, including this one, use the "edit" link to view the complete source. To quickly see the source of a single expression, right-click on it and choose "Show Math As > TeX Commands".
(Note that in some browsers, such as Firefox, th...
The code below shifts each letter of the plaintext message \$2\$ positions in the alphabet. Actually I am supposed to get the key from the user. Instead I just use a fixed key: \$2\$. The problem is this code doesn't loop back to beginning of the alphabet after the letters \$y\$ and \$z\$ or \$...
$d\mid \color{#c00}{10x\!+\!6},\color{#0a0}{3x\!+\!1}\,\Rightarrow\,d\mid \overbrace{3(\color{#c00}{10x\!+\!6})-10(\color{#0a0}{3x\!+\!1})}^{\large {\rm eliminate}\ x}=8,\ $ so $\ d\mid 8,\,\ d>5\,\Rightarrow\,d = 8\ \ $ QED
For one thing, the inconsistency with whitespace use and curly brace placing may demonstrate a lack of attention to detail. Before you attack the actual problem, make sure your code is written cleanly.
This:
for(int i=0;i<=rowIndex;i++)
should use some whitespace:
for (int i = 0; i <= row...
The exercise is the bunny linked list exercise; the last beginner exercise from here.
I'm looking for feedback on absolutely everything that could make me a better programmer:
Syntax
Optimization
Form
Functions or variables naming
Bugs
Performance
Code structure
Keep in mind that I haven't ...
So I posted this some time ago. Here is the new version that I made based on all the comments that were made. Another look and TIPs would be much appreciated. Especially on:
-Getting rid of the global statements
-I read about the use of the return statement which is bad practice in some situati...
