3
What does this line of code mean?
with(epilepsy,by(seizures/timeadj,list(treat,expind),mean))
the data is from the package faraway
.
3
What does this line of code mean?
with(epilepsy,by(seizures/timeadj,list(treat,expind),mean))
the data is from the package faraway
.
5
The function with
is a convenience function that allows you to access the columns of the data.frame
without having to repeat the name of data.frame
at all times.
The code:
with(epilepsy, by(seizures/timeadj, list(treat,expind), mean))
It’s the same thing:
by(epilepsy$seizures/epilepsy$timeadj, list(epilepsy$treat, epilepsy$expind), mean)
See that without the with
you need to repeat the name of data.frame
epilepsy
every time you reference your columns.
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