How to perform natural sorting?

问题

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?

回答1:

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