You can use strsplit
for that:
wkdays <- "Mon,Tue,Wed,Thu,Fri"
unlist(strsplit(wkdays, ","))
this gives:
> unlist(strsplit(wkdays, ",")) [1] "Mon" "Tue" "Wed" "Thu" "Fri"
An alternative is to use scan
:
scan(text = wkdays, sep = ",", what = character())
which gives the same result.