hello,
I have a list of numbers that I want to convert into factors representing
ranges of values. For example, if I have
c(2.5, 1.6, 3.2)
I might want a list of factors like
c("<3", "<3", ">3")
I think I can do this by writing a function and using apply, as.matrix,
&c., but I'm looking for a nicer way. Any help is greatly appreciated.
Thanks!
Sean
R. Sean Bowman wrote:> hello, > > I have a list of numbers that I want to convert into factors representing > ranges of values. For example, if I have > > c(2.5, 1.6, 3.2) > > I might want a list of factors like > > c("<3", "<3", ">3") > > I think I can do this by writing a function and using apply, as.matrix, > &c., but I'm looking for a nicer way. Any help is greatly appreciated. >See ?cut. R> cut(c(2.5, 1.6, 3.2), 3) [1] (2.13,2.67] (1.6,2.13] (2.67,3.2] Levels: (1.6,2.13] (2.13,2.67] (2.67,3.2]
?cut #E.g., cut(c(2.5, 1.6, 3.2),c(-Inf,3,Inf)) #[1] (-Inf,3] (-Inf,3] (3,Inf] See also the "labels" option of cut(). HTH, J. On April 22, 2003 02:14 pm, R. Sean Bowman wrote:> hello, > > I have a list of numbers that I want to convert into factors > representing ranges of values. For example, if I have > > c(2.5, 1.6, 3.2) > > I might want a list of factors like > > c("<3", "<3", ">3") > > I think I can do this by writing a function and using apply, as.matrix, > &c., but I'm looking for a nicer way. Any help is greatly appreciated. > > Thanks! > Sean > > ______________________________________________ > R-help at stat.math.ethz.ch mailing list > https://www.stat.math.ethz.ch/mailman/listinfo/r-help
R. Sean Bowman wrote:> hello, > > I have a list of numbers that I want to convert into factors representing > ranges of values. For example, if I have > > c(2.5, 1.6, 3.2) > > I might want a list of factors like > > c("<3", "<3", ">3") > > I think I can do this by writing a function and using apply, as.matrix, > &c., but I'm looking for a nicer way. Any help is greatly appreciated. >Sorry, wrong syntax for what you asked for: R> R> cut(c(2.5, 1.6, 3.2), breaks = c(-Inf, 3, Inf)) [1] (-Inf,3] (-Inf,3] (3,Inf] Levels: (-Inf,3] (3,Inf] R>