Hi,
May be this helps:
dat1<-
data.frame(Ans=c("Friday","Wednesday","Friday,Saturday,Sunday","Saturday","Sat,Sun","Th,F,Sa"),stringsAsFactors=FALSE)
dat1
Ans
1 Friday
2 Wednesday
3 Friday,Saturday,Sunday
4 Saturday
5 Sat,Sun
6 Th,F,Sa
vec1<- c("Su","M","Tu","W","Th","F","Sa")
vec2<-unlist(strsplit(dat1$Ans,","))
vec2
#[1] "Friday" "Wednesday" "Friday" "Saturday" "Sunday" "Saturday"
#[7] "Sat" "Sun" "Th" "F" "Sa"
sapply(vec1,function(x) length(vec2[grep(x,vec2)]) )
#Su M Tu W Th F Sa
# 2 0 0 1 1 3 4
A.K.
----- Original Message -----
From: bcrombie <bcrom...@utk.edu>
To: r-help@r-project.org
Cc:
Sent: Monday, June 17, 2013 1:59 PM
Subject: [R] help with text patterns in strings
Let’s say I have a data set that includes a column of answers to a question
“What days of the week are you most likely to eat steak?”.
The answers provided are [1] “Friday”, [2] “Wednesday”, [3] “Friday,
Saturday, Sunday", [4] "Saturday”, [5] “Sat, Sun”, [6] “Th, F, Sa”
How can I tell R to count “Friday, Saturday, Sunday”, “Sat, Sun”, and “Th,
F, Sa” as three separate entries for each unique observation?
And is there a way to simultaneously tell R that, for example, “Friday” is
the same as “Fri” or “F”; “Saturday” is the same as “Sat” or “Sa”; etc.?
Thanks for your assistance.
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