analyst41 <at> hotmail.com <analyst41 <at> hotmail.com> writes:
>
> I have a data set that has some comma separated strings in each row.
> I'd like to create a vector consisting of all distinct strings that
> occur. The number of strings in each row may vary.
>
> Thanks for any help.
>
>
#
#
# Some data:
d <- data.frame(id = 1:5,
text = c('one,two',
'two,three,three,four',
'one,three,three,five',
'five,five,five,five',
'one,two,three'),
stringsAsFactors = FALSE
)
#
#
# A function. I'm not a black belt at this, so there
# are probably a more efficient way of writing this.
fcn <- function(x){
a <- strsplit(x, ',') # Split the string by comma
unique(a[[1]]) # Uniquify the vector
}
#
#
# Use the function with sapply.
sapply(d[,2], fcn)
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