Convenience Methods to Sort Data Frames and Data Sets
The methods below return a sorted version of the data frame or data set, given as first argument.
## S3 method for class 'data.frame' sort(x,decreasing=FALSE,by=NULL,na.last=NA,...) ## S3 method for class 'data.set' sort(x,decreasing=FALSE,by=NULL,na.last=NA,...)
x |
a data frame or data set. |
decreasing |
a logical value, should sorting be in increasing or decreasing order? |
by |
a character name of variable names, by which to sort; a formula giving the variables, by which to sort; NULL, in which case, the data frame / data set is sorted by all of its variables. |
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 |
... |
other arguments, currently ignored. |
A sorted copy of x.
DF <- data.frame(
a = sample(1:2,size=20,replace=TRUE),
b = sample(1:4,size=20,replace=TRUE))
sort(DF)
sort(DF,by=~a+b)
sort(DF,by=~b+a)
sort(DF,by=c("b","a"))
sort(DF,by=c("a","b"))Please choose more modern alternatives, such as Google Chrome or Mozilla Firefox.