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How to modify a 2d Scatterplot to display color based on a third array in a CSV file?
To modify a 2d scatterplot to display color based on a third array in a CSV file, we can take the following steps −
- Set the figure size and adjust the padding between and around the subplots.
- Read the CSV file with three headers.
- Create a new figure or activate an existing figure.
- Add an 'ax' to the figure as part of a subplot arrangement.
- Make a scatter plot with CSV file data points.
- To display the figure, use show() method.
Example
import pandas as pd from matplotlib import pyplot as plt plt.rcParams["figure.figsize"] = [7.00, 3.50] plt.rcParams["figure.autolayout"] = True columns = ["data1", "data2", "data3"] df = pd.read_csv("input.csv", usecols=columns) fig = plt.figure() ax = fig.add_subplot(111) ax.scatter(df.data1, df.data2, df.data3, marker="*") plt.show()
The "input.csv" file contains the following data
data1 | data2 | data3 |
---|---|---|
1 | 45 | 71 |
2 | 98 | 65 |
3 | 75 | 29 |
4 | 54 | 63 |
5 | 23 | 12 |
6 | 35 | 27 |
7 | 46 | 39 |
8 | 57 | 44 |
9 | 68 | 51 |
Output
When we run the code, it will produce the following scatter plot
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