I have a very long list of strings. Each string actually contains multiple
values separated by a semi-colon. I need to turn each string into a vector
of the values delimited by the semi-colons. I know I can do this very
laboriously by using loops, nchar, and substr, but it is terribly slow. Is
there a basic R function that handles this situation? If not, is there
perhaps a faster way to do it than I currently am, which is to lapply the
following function? Thanks, Mark
#######################################################################################
string.tokenizer.func<-function(string, separator){
new.vec<- NULL
newString<- ""
if(is.null(string)) {new.vec<-""} else {
for(i in 1:(nchar(string) + 1)){
if(substr(string, i, i) == separator){
new.vec<-c(new.vec,newString)
newString <- ""
} else {
newString<-paste(newString, substr(string, i, i), sep="")
}
}
new.vec<-c(new.vec,newString)
}
new.vec
}
------------------------------------------------------------
Mark W. Kimpel MD ** Neuroinformatics ** Dept. of Psychiatry
Indiana University School of Medicine
15032 Hunter Court, Westfield, IN 46074
(317) 490-5129 Work, & Mobile & VoiceMail
(317) 399-1219 Home
Skype: mkimpel
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