Hello Dear R community,
This is my problem. I have a data set (dataframe) called "mydat". It
consist of 3 numerical variable. They are Centrecode, FSUSN and Round. I want
to create unique ID by combining these 3 variables.
Follwing commands gives me what I need.
mydat1 <- paste(mydat$Centrecode, mydat$FSUSN,mydat$Round,sep="")
newds <- data.frame(mydat1)
For a large data set, I don't want to write like this ...
"mydat$Centrecode, mydat$FSUSN,mydat$Round". So, I tried to automate
using following code.
nvar <-
paste("mydat","$",names(mydat)[1:3],sep="")
mydat1 <- paste(eval(parse(text=nvar)))
newds <- data.frame(mydat1_u)
I am finding problem in the second line. Please help me.
Thank you for your kind help.
--
View this message in context:
http://r.789695.n4.nabble.com/How-to-evaluate-sequence-of-strings-like-this-tp4681823.html
Sent from the R help mailing list archive at Nabble.com.
[[alternative HTML version deleted]]
Tena koe
Try
apply(mydat, 1, paste, collapse='')
HTH ....
Peter Alspach
________________________________________
From: r-help-bounces at r-project.org [r-help-bounces at r-project.org] On
Behalf Of kingsly [ecokingsly at yahoo.co.in]
Sent: Monday, December 09, 2013 12:22 AM
To: r-help at r-project.org
Subject: [R] How to evaluate sequence of strings like this
Hello Dear R community,
This is my problem. I have a data set (dataframe) called "mydat". It
consist of 3 numerical variable. They are Centrecode, FSUSN and Round. I want
to create unique ID by combining these 3 variables.
Follwing commands gives me what I need.
mydat1 <- paste(mydat$Centrecode, mydat$FSUSN,mydat$Round,sep="")
newds <- data.frame(mydat1)
For a large data set, I don't want to write like this ...
"mydat$Centrecode, mydat$FSUSN,mydat$Round". So, I tried to automate
using following code.
nvar <-
paste("mydat","$",names(mydat)[1:3],sep="")
mydat1 <- paste(eval(parse(text=nvar)))
newds <- data.frame(mydat1_u)
I am finding problem in the second line. Please help me.
Thank you for your kind help.
--
View this message in context:
http://r.789695.n4.nabble.com/How-to-evaluate-sequence-of-strings-like-this-tp4681823.html
Sent from the R help mailing list archive at Nabble.com.
[[alternative HTML version deleted]]
The contents of this e-mail are confidential and may be ...{{dropped:14}}
Hi,
You could do without "eval(parse(.."
mydat <-
data.frame(Centercode=letters[1:5],FSUSN=letters[6:10],Round=letters[11:15],stringsAsFactors=FALSE)
mydat1 <- paste(mydat$Centercode, mydat$FSUSN,mydat$Round,sep="")
?mydat2 <- as.character(interaction(mydat,sep=""))
?identical(mydat1,mydat2)
#[1] TRUE
#or
mydat3 <- do.call(paste0,mydat)
identical(mydat1,mydat2)
#[1] TRUE
A.K.
On Sunday, December 8, 2013 8:58 AM, kingsly <ecokingsly at yahoo.co.in>
wrote:
Hello Dear R community,
?This is my problem.? I have a data set (dataframe)?called "mydat". It
consist of 3 numerical variable.? They are Centrecode, FSUSN and?Round. I want
to create unique ID by combining these 3 variables.
Follwing commands gives me what I need.
mydat1 <- paste(mydat$Centrecode, mydat$FSUSN,mydat$Round,sep="")
newds <- data.frame(mydat1)
?
?For a large data set, I don't want to write like this ...???
"mydat$Centrecode, mydat$FSUSN,mydat$Round". So,? I tried to automate
using following code.
?
nvar <-
paste("mydat","$",names(mydat)[1:3],sep="")
mydat1 <- paste(eval(parse(text=nvar)))
newds <- data.frame(mydat1_u)
?
I am finding problem in the second line.?Please help me.?
Thank you for your kind help.
--
View this message in context:
http://r.789695.n4.nabble.com/How-to-evaluate-sequence-of-strings-like-this-tp4681823.html
Sent from the R help mailing list archive at Nabble.com.
??? [[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.