Questions tagged [heatmap]

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

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R - using heatmaply for a 2d histogram / density

I have a rather long series of x, y coordinates representing a character in 2d space. Let's say that space is 200 x 400. I want to represent the amount of time the character is in each x, y coordinate ...
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24 views

Differences between pseudocolor plot and heatmap?

I found some materials using the word `pseudocolor plot' and I think that it's just a heatmap. Is there any difference between them?
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21 views

Generating a Confusion Matrix from a Seaborn Heatmap

Is there a way I can reverse engineer a Seaborn heatmap saved as .png? I want to get the array of values out of it. Does the library provide a "load-from-image" facility, or is there any sta
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Coding advice/tricks to create a Seaborn heatmap for a high number of columns or most relevant only

The number of columns (more than 30) gives the Seaborn heatmap a messy appearance and impossible to glean important information from. What I am wondering is, can I map ONLY variables with the most ...
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17 views

GEO Choropleth not found

I'm Trying create, from Geo add-on, a Chropleth map in Orange version 3.24.1 for windows . But, this widget just don't appear... some tip?
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Understanding CNN by visualizing class activations using GRAD_CAM

I followed the blog Where CNN is looking? to understand and visualize the class activations in order to predict something. The given example works very well. I have developed a custom model using ...
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205 views

Sns Heatmap save as png jpeg image with full labels visible via python

I am trying to save my heat map in png format using the below code, but the labels are getting trimmed when I am saving the heatmap. Please help to keep the labels inside the figure. ...
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55 views

Is converting a categorical value into numerical needed to find a correlation?

I have a small dataset of 1300 observations x 20 features. They are all numerical but one, which is categorical; this was calculated independently and relates to each observation in any case. I'm now ...
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37 views

How should I read the following heatmap?

I've been playing around with the linear regression, and I was thought that before commencing it's always good to plot an heatmap to see whether there are features that somehow is worth testing for ...
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17 views

Seaborn heatmap plot contains strings of unfamiliar characters

Pfile was loaded in the wrong encoding utf-8 How do I fix the error above when I plot an heatmap using Seaborn? I expected a heatmap plot to be generated in .png, rather, I have a string of ...
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110 views

Why am I getting misaligned values while plotting heatmaps using seaborn?

While plotting heatmaps using seaborn, the numbers are getting printed on the boundary of the heatmap (Please see the image attached). I have already plotted heatmaps many times using the same code. ...
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17 views

Population Data

I'm trying to creating a heatmap using Esri Arcgis but need to find a data set of the population within a 1-mile and 3-mile radius. Does anyone know if there is a free data set that I could use? ...
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124 views

How to display an Heat Map (using Tableau or other BI tool)?

I've a simple dataset: Id Longitude Latitude Value What can I obtain at the moment are "one map point" in every place.. Sum of Value don't affect "density" color. I would like to display a ...
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180 views

GradCAM heatmap all negative

I've fully trained the VGG16 model on my dataset, resulting in a 97% validation accuracy. I'm using the code from this github: https://github.com/PowerOfCreation/keras-grad-cam but for 2 of my 16 ...
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35 views

What should be the criteria to select features using correlation factors between features? [duplicate]

For the titanic dataset, I have done some feature engineering (one-hot encoded the features) and now I have developed a heatmap to view the correlation between different features. I'm not able to ...
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194 views

Changes in the standard Heatmap plot - symmetric bar colors, show only diagonal values, and column names at x,y axis ticks

I have a heatmap image (correlation between all matrix columns) and I'm straggling to preform all the changes below within the same image: bar colors should be symmetric around zero (e.g., ...
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422 views

MSE vs Cross Entropy for training with facial landmark (pose) heatmaps

I am trying to reimplement the excellent paper https://github.com/1adrianb/face-alignment-training in tensorflow. I have successfully defined the network and downloaded the LSD3D-W dataset. I am ...
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133 views

Alternatives to Heat Maps for Communicating Daily Data

I am currently using the heat map below to communicate the number of messages sent on a messing platform over time. I don't think this is the most effective way to communicate the information as it's ...
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How to plot a heatmap-like plot for categorical features?

I would greatly appreciate let me know how to plot a heatmap-like plot for categorical features? In fact, based on this post, the association between categorical ...