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Count values pandas

Count values pandas

>>> index = pd.Index([3, 1, 2, 3, 4, np.nan])
>>> index.value_counts()
3.0    2
4.0    1
2.0    1
1.0    1
dtype: int64

10

Source: pandas.pydata.org

Relativefrequencies of the unique values pandas

df.value_counts(normalize=True)

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Pandas count values by column

df = pd.DataFrame({'a':list('abssbab')})
df.groupby('a').count()

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Get count of values in column pandas

In [37]:df = pd.DataFrame({'a':list('abssbab')})
df.groupby('a').count()Out[37]:  aa  a 2b 3s 2[3 rows x 1 columns]

0

Source: stackoverflow.com

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