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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Quantifying heat map data

I have heatmap data (the x and y axis take in angles as inputs, and the color of that particular spot on the grid represents the "divergence.") I am unsure on how to numerically describe my ...
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Is there a way to achieve a transparent basemap with px.density_mapbox?

I'm creating a heatmap with Plotly density_mapbox, and I need the background to be fully transparent so that the heatmap can be exported to geotiff and used as an overlay for an external map. The ...
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Heatmap not respecting the color bounds

For the following dataframe of a chi2 correlation study, i started to plot a heatmap: ...
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Seaborn Heatmap with month & hour of database entry

I have a dataframe with X rows. For each row, I have the information of the month (value from 1 to 12) and hour (value from 1 to 24) in separate columns I need to create a heatmap with seaborn in ...
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Dropping highly correlated features

I am making my classification project and I have this situation after using seaborn heatmap. Column 0 is my target, where I have data with 3 classes. To my knowledge I should remove column highly ...
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Online Generating Dendrograms with imported CSV file

Is there any website out there that performs hierarchical clustering on an imported file like CSV to generate dendrograms or similarity matrix? Free or paid does not matter. So far I found heatmapper....
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Should I remove features such as gender and birth month before drawing the heatmap because they are categorical?

I am working on a dataset that has both categorical and numerical (continuous and discrete) features (26 columns, 30244 rows). Target is categorical (1, 2, 3) and I am performing EDA on this dataset. ...
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seaborn heatmap - x axis - repeated values

I'm in trouble creating a heatmap using a CSV file. csv data is in a format like below here is a code ...
Hello-experts's user avatar
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How to compare 10000 data frames in Python?

I have 10000 data frames like this: Each data frame corresponds to a different card game (and so different numbers in the table) and I want to compare these data frames all together. For example, I ...
Dan's user avatar
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Heat map and correlation among variables [closed]

I would have a question on heat map and correlation among variables. I created this heat map, looking at possible correlation among variables and target. I got very small values. I wanted to set a ...
Math's user avatar
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Why do I get two different values in heatmap and feature_importances?

I'm running a feature selection using sns.heatmap and one using sklearn feature_importances. When using the same data I get two difference values. Here is the heatmap and heatmap code ...
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Heatmap of large 2D array using datashader and plotly

I’m trying to show a heatmap of a large 2D array (160x250000 entries). This should go into a dash app so I'm using plotly to deal with graphics and my idea was to use datashader for performance but I’...
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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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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
Andrei-Cristian Rad's user avatar
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Geo Add-on Choropleth Widget not found

I am trying to create a Choropleth map using the Chorolpeth widget from the Geo Add-on in Orange. However, this widget is not appearing? Any ideas? My current version: Orange version 3.24.1 for ...
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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 ...
Ali Raza Memon's user avatar
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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. ...
Shivam Sharma's user avatar
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677 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 ...
Andrea Moro's user avatar
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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 ...
Andrea Moro's user avatar
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3 answers
321 views

understading the corr heatmap

I want your help to analyze this correlation heat map If you look at this heat map, what can you infer and what can you apply?
slowmonk's user avatar
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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. ...
soham_dhole's user avatar
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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 ...
stighy's user avatar
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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 ...
Allie's user avatar
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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 ...
Tushar Seth's user avatar
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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., ...
Serendipity's user avatar
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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 ...
azmath's user avatar
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844 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 ...
Beatrice's user avatar
2 votes
1 answer
4k views

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 ...
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