orderBy {doBy} | R Documentation |
Ordering (sorting) rows of a data frame by the certain variables in the data frame. This function is essentially a wrapper for the order() function - the important difference being that variables to order by can be given by a model formula.
orderBy(formula, data, na.last = TRUE, decreasing = FALSE)
formula |
The right hand side of a formula |
data |
A data frame |
na.last |
for controlling the treatment of 'NA's. If 'TRUE', missing values in the data are put last; if 'FALSE', they are put first; if 'NA', they are removed. |
decreasing |
logical. Should the sort order be increasing or decreasing? |
The ordered data frame
Søren Højsgaard, sorenh@agrsci.dk
~~objects to See Also as help
, ~~~
data(dietox) orderBy(~Time+Evit, data=dietox)