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Counting various elemnts in a vactor
4 messages · Dimitris Rizopoulos, Katherine Gobin, arun
try this:
df <- c("F", "C", "F", "B", "D", "A", "D", "D", "A", "F", "D", "F", "B",
"C")
tab <- table(df)
tab
rep(names(tab), 100 * tab)
I hope it helps.
Best,
Dimitris
On 3/26/2013 9:12 AM, Katherine Gobin wrote:
Dear R forum
I have a vector say as given below
df = c("F", "C", "F", "B", "D", "A", "D", "D", "A", "F", "D", "F", "B", "C")
I need to find
(1) how many times each element occurs? e.g. in above vector F occurs 4 times, C occurs 2 times etc.
(2) Depending on the number of occurrences, I need to repeat the element 100 times of the occurrences e.g. I need to repeat F 6 * 100 = 600 times, C 2*100 = 200 times.
I can manage the second part i.e. repeating but I am not able to count the number of times the element is appearing in a given vector.
Kindly guide
Katherine
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______________________________________________ R-help at r-project.org mailing list https://stat.ethz.ch/mailman/listinfo/r-help PLEASE do read the posting guide http://www.R-project.org/posting-guide.html and provide commented, minimal, self-contained, reproducible code.
Dimitris Rizopoulos Assistant Professor Department of Biostatistics Erasmus University Medical Center Address: PO Box 2040, 3000 CA Rotterdam, the Netherlands Tel: +31/(0)10/7043478 Fax: +31/(0)10/7043014 Web: http://www.erasmusmc.nl/biostatistiek/
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Hi,
library(plyr)
?df1<-count(df)
rep(df1[,1],df1[,2]*100)
count(as.character(rep(df1[,1],df1[,2]*100)))
#? x freq
#1 A? 200
#2 B? 200
#3 C? 200
#4 D? 400
#5 F? 400
A.K.
----- Original Message -----
From: Katherine Gobin <katherine_gobin at yahoo.com>
To: r-help at r-project.org
Cc:
Sent: Tuesday, March 26, 2013 4:12 AM
Subject: [R] Counting various elemnts in a vactor
Dear R forum
I have a vector say as given below
df = c("F", "C", "F", "B", "D", "A", "D", "D", "A", "F", "D", "F", "B",??? "C")
I need to find
(1) how many times each element occurs? e.g. in above vector F occurs 4 times, C occurs 2 times etc.
(2) Depending on the number of occurrences, I need to repeat the element 100 times of the occurrences e.g. I need to repeat F 6 * 100 = 600 times, C 2*100 = 200 times.
I can manage the second part i.e. repeating but I am not able to count the number of times the element is appearing in a given vector.
Kindly guide
?
Katherine
??? [[alternative HTML version deleted]]
______________________________________________
R-help at r-project.org mailing list
https://stat.ethz.ch/mailman/listinfo/r-help
PLEASE do read the posting guide http://www.R-project.org/posting-guide.html
and provide commented, minimal, self-contained, reproducible code.