Plot number of occurrences from Pandas DataFrame

Question

I have a DataFrame with two columns. One of them is containing timestamps and another one - id of some action. Something like that:

2000-12-29 00:10:00     a         


        

Answer 1

You can get the counts by using

df.groupby([df.index.date, 'action']).count()

or you can plot directly using this method

df.groupby([df.index.date, 'action']).count().plot(kind='bar')

You could also just store the results to count and then plot it separately. This is assuming that your index is already in datetimeindex format, otherwise follow the directions of @mkln above.