Is there a natural sort for R?
Say I had a character vector like so:
seq.names <- c('abc21', 'abc2', 'abc1', 'abc01', 'abc4', 'abc201', '1b', '1a')
I'd like to sort it aphanumerically, so I get back this:
c('1a', '1b', 'abc1', 'abc01', 'abc2', 'abc4', 'abc21', 'abc201')
Does this exist somewhere, or should I start coding?
I don't think "alphanumeric sort" means what you think it means.
In any case, looks like you want mixedsort.
> install.packages('gtools')
[...]
> require('gtools')
Loading required package: gtools
> n
[1] "abc21" "abc2" "abc1" "abc01" "abc4" "abc201" "1b" "1a"
> mixedsort(n)
[1] "1a" "1b" "abc1" "abc01" "abc2" "abc4" "abc21" "abc201"
来源：https://stackoverflow.com/questions/2778039/how-to-perform-natural-sorting