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Questions tagged [data-visualization]

Plotting data graphically, static or interactive.

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5 votes
2 answers
148 views

Tracking Containers in a Train Station

This is a time line for control over the events of some containers in a train station. It gets all the data to build the time line by getting a JSON from a database via REST service. The app resets ...
Vhalad's user avatar
  • 91
3 votes
1 answer
88 views

Bar graph of Easter date distribution

Computing Easter for a given year is a classic computational problem. It is also one of the few cases when code seems to just have to live with magic numbers. Alternative to magic numbers: Decoding ...
chux - Reinstate Monica's user avatar
19 votes
1 answer
2k views

Sorting algorithm visualizer in C++ and SDL2

I finished a sorting algorithm visualizer (for now only uses bubble sort) and this is the code. I'd like some suggestions to improve the memory usage or time elapsed. Built with Cmake and Ninja on ...
Nadpher's user avatar
  • 889
13 votes
1 answer
1k views

Plotting polynomials roots

NOTE: See follow up to this question here I created a simple python script to plot quadratic, cubic and quartic polynomials with integer coefficients between -4 and 4. It uses numpy to find the roots ...
Linus's user avatar
  • 917
12 votes
2 answers
996 views

Speech Recognition Part 1: Generate Training Data

You've all heard of neural nets, no? One of the "hello world"s of neural nets is OCR with the MNIST dataset. My idea for speech recognition is to train the neural net with short labeled spectrograms ...
syb0rg's user avatar
  • 21.8k
11 votes
1 answer
134 views

Python genetic sequence visualizer

I'm a beginner at python, and this is my first major project. Inspired by this reddit post, I wrote a program that accepts a DNA sequence (in a FASTA file format) and generates a graphical ...
logwet's user avatar
  • 175
11 votes
2 answers
454 views

Plotting polynomial roots with density

Follow up on Plotting polynomial roots I rewrote the program to C++ and am now using GNU GSL scientific library and gnuplot and also used OpenMP for multithreading. The result is that it takes about ...
Linus's user avatar
  • 917
9 votes
1 answer
222 views

Chart showing the Percentage of Answered CR questions

Every day Duga reports the number of unanswered questions and percentage of answered questions (after she calls the API endpoint /info) in The 2nd Monitor (so we ...
Sᴀᴍ Onᴇᴌᴀ's user avatar
9 votes
1 answer
136 views

Frequency analysis for simultaneous dice rolls

My professor told me to optimize my perl code, but he wouldn't tell me what exactly - just make it simpler. I changed some little things but nothing major. Am I missing something? The task was: ...
alec's user avatar
  • 131
6 votes
2 answers
260 views

Genetic Sequence Visualizer - Generating large images

Inspired by this reddit post, I have written a program that accepts a DNA sequence (in a FASTA file format) and generates a graphical representation. HIV virus and Ebola virus My program works like ...
logwet's user avatar
  • 175
6 votes
1 answer
179 views

Multithreaded HD Image Processing + Logistic reg. Classifier + Visualization

[I'm awaiting suggestions for improvement/optimization/more speed/general feedback ...] This code takes a label and a folder path of subfolders as input that have certain labels ex: trees, cats with ...
watch-this's user avatar
5 votes
1 answer
5k views

Print the frequency of characters as a horizontal histogram

Well, I've used some of the feedback from my last posting to improve how I wrote this program. Mainly using the void parameter in main, initializing my int array to zero without using a for-loop, and ...
cody.codes's user avatar
  • 1,935
5 votes
1 answer
5k views

Tkinter GUI for running HPLC pumps, real-time data visualization

What I made I used Tkinter to write a GUI to run some HPLC pumps for my work. The application sends some messages to the pumps via serial connections, reads a response, then logs data to a csv file. ...
teauxfu's user avatar
  • 83
3 votes
1 answer
126 views

Three-dimensional DCT spatial frequency components illustration

I am attempting to make three-dimensional discrete cosine transformation spatial frequency components illustration. The 3D cubes is used to present the level of each coefficient. The more bright the ...
JimmyHu's user avatar
  • 5,020
3 votes
2 answers
1k views

K&R Exercise 1-13. Printing histogram of word lengths (horizontal variant)

I'm going through the K&R book (2nd edition, ANSI C ver.) and want to get the most from it. How does the following solution look to you? Note that, for the sake of exercise, I don't want to use ...
div0man's user avatar
  • 341