convert a column’s type

pandas:

mtcars.assign(hp = mtcars.hp.astype(float))

plydata:

mtcars >> dp.define(hp = 'hp.astype(float)')

dpylython:

mtcars >> dp.mutate(hp = X.hp.astype(float))

dfply:

mtcars >> dp.mutate(hp = X.hp.astype(float))

dppd:

dp(mtcars).mutate(hp = X.hp.astype(float)).pd