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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17 views

DateTime labels in a Seaborn Heatmap

I am plotting a time evolution using a heatmap in the following way: fig, ax = plt.subplots(figsize=(10,10)) sns.heatmap(active, ax = ax) Where active is a ...
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23 views

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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119 views

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 ...
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14 views

Visualizing post-hoc results of many days

I'm looking for ideas how to plot many Tukey HSD results. My origianl dataframe has 3 treatments. The values of each patient were measured every day for one month. One-way ANOVA has shown that there ...
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1answer
50 views

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 ...
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1answer
36 views

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 ...
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13 views

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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284 views

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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13 views

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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1answer
50 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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84 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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1answer
44 views

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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107 views

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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1answer
3k 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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1answer
117 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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1answer
46 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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84 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?
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294 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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1answer
393 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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396 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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1answer
43 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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286 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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1answer
905 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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1answer
428 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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3k 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 ...