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]]
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
>
>
>
>
>
>
>
>
>
>
>
> [[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.
>
--
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/
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.