Stack Overflow
Stack Overflow

Questions tagged [heatmap]

A heat map is a graphical representation of data where the individual values contained in a matrix are represented as colors.

A heat map (or heatmap) is a graphical representation of data where the individual values contained in a matrix are represented as colors.

Heat maps can be used to display statistics (especially in statistical computing and graphics), user experience on websites.

An example of a heat map:

Source: seaborn.heatmap

Additional Resources

Related Tags

4357 questions
1
vote
1 answer

Bin DataFrame in 2D array for seaborn heatmap

I have a dataframe that looks like. +-----------+-------+ | A | B | +-----------+-------+ | 1 | 1 | | 2 | 2 | | 5 | 3 | | 20 | 4 | | 25 | 3 | | 123 | 5 | | 125 | …
Abhishek Rastogi
  • 123
  • 1
  • 1
  • 6
1
vote
1 answer

Using chartjs to limit data?

I have a react chartjs project that uses chartjs-chart-matrix to render a heatmap. My code config looks like so: const getHeatmapConfig = ({ heatmapData, getBackgroundColor, xAxisLabels, tissues: items, openMenu, title }) => ({ type:…
Nespony
  • 1,253
  • 4
  • 24
  • 42
1
vote
0 answers

Python: How to Draw heatmap on a image with X, Y coordinates with temperature

I have a layout image and trying to draw heatmap on it. Basically I have three columns, 1. x coordinate, 2. y coordinate, 3. Temperature. Ex data: [x, y, temp] [0, 0, 28'c, 3, 4, 36'c, 8, 10, 38'c] I want to generate a heat map for temperature…
Nishanth
  • 19
  • 3
1
vote
1 answer

Pandas multi labeled data to heatmap

I have the following data structure: Each row represents one annotation. If the user labeled the data with labels 2 and 3 (see second row aka row index 1) than the dataset would be 1 1 0 0 0 0 0. I would like to make a heatmap out of this, in order…
Mike
  • 466
  • 9
  • 24
1
vote
1 answer

Change the legend in highcharts heatmap to show instead of a color bar, a set of fixed icons with hide and show on click

Is it possible to have the same feature that you get in Apache echarts. Refer to the following Apache echarts example in JS snippet, where the legend given by type:"piecewise" allows the user to hide on click particular color values. How can i get…
stats con chris
  • 178
  • 1
  • 10
1
vote
1 answer

How can I smooth my heatmap? (ggplot2, geom_tile())

I have created this sort of heatmap, but I need it to look smoother than like this code: ggplot(data = DF_with0, aes(V1, V2, fill = V3)) + geom_tile() + …
puppeschi
  • 11
  • 1
1
vote
1 answer

Overleaped heatmap doesn't show correctly

I have a heatmap plotted above an image (as shown on image link 1), with gaussian filter and normalize data. The main issue is that there is no value under 92 on the y axis, so the plot doesnt start on (0,0), instead start on (0,92). So, when I put…
nachon
  • 45
  • 6
1
vote
1 answer

Clicking `seaborn` heatmap to print metadata from that cell

I have figured out how to print a matplotlib scatterplot and have the points be clicked to give graphs of other data, based on the metadata of the clicked point. I now want to apply similar thinking to a seaborn heatmap. The trouble is that the…
Dave
  • 314
  • 2
  • 13
1
vote
1 answer

How to merge a heatmap with its mirror image

I have data for which I can make a heatmap in the form of a triangle. import numpy as np import matplotlib.pyplot as plt import seaborn as sns c = np.array([[1, np.nan, np.nan, np.nan, np.nan, np.nan], [-0.140898, 1, np.nan, np.nan,…
Kate
  • 51
  • 3
1
vote
1 answer

How can I speed up raw data computation

I have the temperature according to x,y,z as raw data. I want to turn the raw data of x, y, z, t into grid data. When transforming data by applying t values to the x and z coordinates according to z, I created a zero array and converted it into a…
J_SH
  • 51
  • 3
1
vote
1 answer

Overlay Heatmap onto a contour map of different sizes

I want to overlay a heatmap onto a contour plot on plotly with python. The two images come from numpy arrays, and they are different sizes. I will need to overlay the second image at a particular spot on the contour plot, as well I will have to…
Daniel Turon
  • 21
  • 3
1
vote
1 answer

Heatmap of minimum, median, maximum values in python

In the dataset below: # Copy and paste the code below to get the dataframe output import pandas as pd import numpy as np df= { 'Gen':['M','M','M','M','F','F','F','F','M','M','M','M','F','F','F','F'], …
nasa313
  • 266
  • 2
  • 12
1
vote
1 answer

slow browser rendering of plotly heatmap

I'm rendering a 212 row x 64 column DF of ints (final_df) ranging from 0 to 6 as an (annotation-less) plotly annotated heatmap. I’m doin this in my browser (microsoft edge) using a file from fig.write_html(). The final heatmap renders very slowly…
Tim Kirkwood
  • 598
  • 2
  • 7
  • 18
1
vote
0 answers

The plt.colorbar is not corresponding to the image color

I am doing with the heatmap of one CNN model. cv2.applyColormap is used to tranfer the heatmap into color, and it is shown by plt.imshow. I want to add a colorbar in the image. But when I use plt.colorbar(), the colorbar is not correctly…
RicardoSun
  • 11
  • 2
1
vote
3 answers

Plotting a heatmap based on a scatterplot in Seaborn

Is there any way that I can plot a heatmap in seaborn based on a scatter plot? For instance, I have the following scatter plot and want to plot the corresponding heatmap in such a way that darker spots in the heatmap shows more crowded areas in the…
amiref
  • 3,181
  • 7
  • 38
  • 62
1 2 3
…
99 100