Data Science Stack Exchange
Data Science Stack Exchange

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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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 want to compare the heat maps of these data frames.…
Dan
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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 Windows
Sanderson Macedo
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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 autoencoders for image similarity. The model accepts…
Ali Raza Memon
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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 variables should be computed using Crammer's V. Therefore, I found the following code…
ebrahimi
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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. The categorical features with numerical values…
leahnanno
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Heat map and correlation among variables

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 small threshold, e.g., 0.05, for selecting…
Math
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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’m having troubles getting it right. However,…
andins
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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?
Jie
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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
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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 attempting to find the correlation of each…
Andrea Moro
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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 Geographic Heat Map like this (i copied from Google…
stighy
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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 difficult to read and see trends. Although, I…
Beatrice
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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 years = np.array(datadf.PublicationYear) sns.set(font_scale=2) wordlist = ['greenhouse_gas', 'pollution', 'resilience', 'urban','city',…
Hello-experts
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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 from matplotlib import pyplot as plt import pandas as pd import…
Austin Johnson
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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. array = confusion_matrix(gts, preds, labels=class_name) …
Shivam Sharma
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