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Analyzing Police Activity with pandas

Kevin Markham

Founder, Data School

Pohlaví řidiče a prohlídky vozidla

ri.search_conducted.mean()

0.0382153092354627

ri.groupby('driver_gender').search_conducted.mean()

driver_gender
F    0.019181
M    0.045426

ri.groupby(['violation', 'driver_gender']).search_conducted.mean()

violation            driver_gender
Equipment            F                0.039984
                     M                0.071496
Moving violation     F                0.039257
                     M                0.061524
Other                F                0.041018
                     M                0.046191
Registration/plates  F                0.054924
                     M                0.108802
Seat belt            F                0.017301
                     M                0.035119
Speeding             F                0.008309
                     M                0.027885

search_rate = ri.groupby(['violation',
                          'driver_gender']).search_conducted.mean()

search_rate

violation          driver_gender
Equipment          F               0.039984
                   M               0.071496
Moving violation   F               0.039257
                   M               0.061524
...                ...                  ...

type(search_rate)

type(search_rate.index)

pandas.core.series.Series

pandas.core.indexes.multi.MultiIndex

violation          driver_gender
Equipment          F               0.039984
                   M               0.071496
Moving violation   F               0.039257
                   M               0.061524
...                ...                  ...

search_rate.loc['Equipment']

driver_gender
F    0.039984
M    0.071496

search_rate.loc['Equipment', 'M']

0.07149643705463182

Převod víceúrovňové Series na DataFrame

search_rate.unstack()

driver_gender             F         M
violation
Equipment          0.039984  0.071496
Moving violation   0.039257  0.061524
Other              0.041018  0.046191
...                     ...       ...

type(search_rate.unstack())

pandas.core.frame.DataFrame

Převod víceúrovňové Series na DataFrame

ri.pivot_table(index='violation',
               columns='driver_gender',
               values='search_conducted')

driver_gender             F         M
violation
Equipment          0.039984  0.071496
Moving violation   0.039257  0.061524
Other              0.041018  0.046191
...                     ...       ...

Pojďme si procvičit!

Analyzing Police Activity with pandas