How to create box plot from pandas object using matplotlib?

Question

I read data into pandas object and then I want to create a box plot using matplotlib (not pandas.boxplot()). This is just for learning purposes. This is my code, in which myData['MyColumn'] fails.

import matplotlib.pyplot as plt
import pandas as pd

myData = pd.read_csv('data/myData.csv')

plt.boxplot(myData['MyColumn'])

plt.show()

For your example with one column, just convert the pandas series myData['MyColumn'] into a list — joaquin
– joaquin, Commented Sep 4, 2015 at 19:30
What's the error you're getting? That worked just fine (on my data) for me. As for the suggestion from @joaquin, I believe he means trying this: plt.boxplot(myData['MyColumn'].values) — Zaphod
– Zaphod, Commented Sep 4, 2015 at 21:48

Eugene Yurtsev · Accepted Answer · 2015-09-05 03:15:48Z

1

Your code works fine with fake data. Check the type of the data you're trying to plot.

import matplotlib.pyplot as plt
import pandas as pd
import numpy as np
myData = pd.DataFrame(np.random.rand(10, 2), columns=['MyColumn', 'blah'])
plt.boxplot(myData['MyColumn'])
plt.show()

answered Sep 5, 2015 at 3:15

Eugene Yurtsev

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