pandas_ml change confusion matrix image size

Question

How can the size of a pandas_ml confusion matrix image with lots of classes be increased so the labels are clearly visible?

Such an image can be generated in Jupyter like this:

import pandas as pd from pandas_ml import ConfusionMatrix import matplotlib.pyplot as plt import string %matplotlib inline classes = string.printable # 100 target classes df = pd.DataFrame({'true':list(classes*10), 'pred':sorted(classes*2)+list(classes*8) }) cm = ConfusionMatrix(df['true'],df['pred']) cm.plot()

I've tried various suggestions involving changing figure sizes and subfigure sizes, as well as looking for size or width in the pandas_ml docs but nothing has worked so far.

Giovanni Pasqualino · Accepted Answer · 2019-07-26 10:51:19Z

1

Use:

plt.figure(figsize=(20,20))

cm.plot(normalized=True, backend="seaborn")

edited Jul 26, 2019 at 10:51

answered Jul 26, 2019 at 6:24

Giovanni Pasqualino

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2 Comments

Frieder Over a year ago

A little more explanation why this will solve the issue would be nice.

user1717828 Over a year ago

Confirming this does work, but only when the backend is seaborn. Why is that?

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