Mastering pandas - Second Edition

An illustrative example

We will consider the dataset known as faithful, which consists of data that was obtained by observing the eruptions of the Old Faithful geyser in the Yellowstone National Park in the US. The two variables in the dataset are eruptions, which are the length of time the geyser erupts, and waiting, which is the time until the next eruption. There were 272 observations:

    In [46]: import statsmodels.api as sma
             faithful=sma.datasets.get_rdataset("faithful")
             faithful
    Out[46]: <class 'statsmodels.datasets.utils.Dataset'>
    
    In [48]: faithfulDf=faithful.data
             faithfulDf.head()
    Out[48]:    eruptions   waiting
            0   3.600       79
            1   1.800       54
            2   3.333       74
            3   2.283       62
            4  4.533        85
    5 rows × 2 columns
    
    In [50]: len(faithfulDf)
    Out[50]: 272

Let's calculate ...