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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

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4357 questions
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R: I am making a heatmap from a matrix, but ggplot2 geom_raster reorders the (numerical) values to alphabetic

I am trying to make a heatmap that displays a histogram over 100 days. My data looks as follows: >head(dat_from_hist) 0 1 2 3 4 5 6 7 8 9 10 11 12 13 14 [1,] 2 3 11 20 16 17 13 10 6 1 1 1 0 0 0 [2,] 2 3 12 26 18 19 7 6 4 3 1 1 0…
Oscar de Vries
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Tickval does not assign correct position to ticktext

I am plotting an annotated heatmap with a colour bar using the code below, inspired in part by this very helpful tutorial (its part of a larger bit of code which I'll put at the end). final_df is a dataframe whose columns are protein IDs and index…
Tim Kirkwood
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Folium Heatmap with color bar Values

In my project I receive a DataFrame with scores for cities in the US. I can plot the HeatMap using Folium however I would like to add a colorbar to showcase the numerical values of these scores, based on the color of the HeatMap. Is there a way to…
LucasVaz97
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Heatmap log colour scale: caxis() doesn't map values correctly

I have a 2D array with logarithmically distributed values from [1e-5, 1e5]. For various reasons, I want to change the colourbar with limits beyond this range. I do this using caxis, e.g. caxis([a,b]), where a and b are the desired exponents. However…
ddm_ingram
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how to increase labels distance from main plot in heatmaply r

I have a simple issue in interactive heatmap in R. I couldn't figure out how to increase margins (distance between x and y labels with main plot) in heatmaply? I want to add a little bit of space in ylab (province) from heatmap. Could anybody help…
rez
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Table and Heatmap

I am trying to make a heatmap table. I want to have a table similar to the table below. Below you can see data and code. TestData1<-structure(list(Countries = c("AL", "CA", "DE", "ES", "MA", "EL", "AL",…
silent_hunter
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Can't get rid of these circles while making a folium driven heat map

I'm making a heat map with folium and some open crime data from the city of Portland. When I make the final heatmap, it looks fine, except these blue circles cover up all the heat map colors, making it look like a bunch of blue blobs. Like the blue…
Amanda_Panda
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How do I flip the color scaling of seaborn's sns.heatmap?

I have this piece of code that compares chess openings to their outcomes: z = df2.groupby(["winner", "opening_name"]).size().unstack().fillna(0).astype(int) fig, ax = plt.subplots(figsize=(32, 16)) sns.heatmap(z.apply(lambda x: x/x.sum()),…
Keperoze
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2D Heatmap from 3D data python

I am trying to produce a 2D heatmap/intensity plot from a 3d dataset with eg x, y, z: 0 0 2 1 0 4 1 1 2 2 0 3 2 1 4 .. where (x,y) are gridpoints and z is the amplitude of my function z =…
GenericPhysicsStudent
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How can I draw a circle over a seaborn heatmap?

Given I have a dataframe with x,y coordinates and a value, I am able to draw a heatmap via seaborn. In a next step, I want to draw an addition circle within this data from the center of the plot with a radius of 10. Therefore I calculated x_center…
user10679526
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sns.heatmap y axis not being overwritten

Goal: I want to create a heatmap from a dataframe which has 2 indexes. The 2nd index, called 'Profile_Name', is also used to loop through the dataframe to create several heatmaps. Problem: The sns.heatmap does not allow me to change the values on…
Sebastian ten Berge
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Seaborn heatmap...white out the bottom row and right column

I have a heatmap in Seaborn via sns.heatmap. I now want to white out the bottom row and right column but keep the values. import numpy as np import matplotlib.pyplot as plt import seaborn as sns import pandas as pd np.random.seed(2021) df =…
Dave
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Seaborn heatmap spacing on x axis

I am currently using seaborn.heatmap() to display binary data that I have organized in a pandas.DataFrame. The index of the DataFrame is discrete and corresponds to different locations, while the columns are continuous and represent time. How can I…
nevs
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Heatmap with circles instead of tiles in ggplot

if I have an integer vector (or if I put it into a matrix), is there anyway to plot a heatmap using ggplot or other packages that can give me each point as a circle instead of a tile? > counts [1] 1949 1690 1935 2480 1441 1141 2079 1587 517 1028 …
Jeff238
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How to make OpenCV C++ heatmap given 2d Array

I have a 2d Array/matrix of values, and I want to make a heatmap of it using OpenCV and C++. I want high values in the 2d array to correlate to a dark color, while the lower values in the 2d array to correlate to a lighter color. Can this be done…
Voyager
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