Pandas - Stacked Bar Chart With Timeseries Data

I'm trying to create a stacked bar chart in pandas using time series data: DATE TYPE VOL 0 2010-01-01 Heavy 932.612903 1 2010-01-01 Light 370.61

Solution 1:

Let's use pandas plot:

df = df.set_index('DATE')
#moved the 'DATE' column into the index

df.index = pd.to_datetime(df.index)
#convert the string 'DATE' column to a datetime dtype

df.set_index('TYPE',append=True)['VOL'].unstack().plot.bar(stacked=True,figsize=(10,8))
#Moved 'TYPE' into the index with 'DATE' then unstacked 'TYPE' to create a dataframe that has 'DATE' as row labels and 'TYPE' as column labels.  And, then used pandas dataframe plot to chart that frame as a vertical bar chart with stacked=True.