CODEWITHSUNDEEP
rvector
san
san

Reputation: 23

Make a character vector a numeric vector in R?

I have created a character vector using paste, for example: 

y <- paste("a=1,b=2,c=3")

If I try to combine it: 

x <- c(y)

I get: 

[1] "a=1,b=2,c=3"

I would like to get the same as if I did: 

c(a=1,b=2,c=3)

which gives: 

a b c   
1 2 3

Sorry if this is too basic, I am new to R (and the site). Thanks!

Upvotes: 1

Views: 334

Answers (3)

IRTFM
IRTFM

Reputation: 263301

I wonder if this is what your really want, but since you asked, here it is. This is not considered good practice, but perhaps you have a use case that would make it useful.

> eval( parse(text=paste("c(", y, ")" ) ) )
a b c 
1 2 3

The answedr fron Nader hints at what appears to be a missunderstanding about constructing R character variables. The paste functions seems entirely superfluous for building y: Just doing this is equivalent:

y <- "a=1,b=2,c=3"

Upvotes: 0

Nader Hisham
Nader Hisham

Reputation: 5414

y <- c("a=1,b=2,c=3")

list <- lapply(strsplit(y , ","), function(x){
  strsplit(x , "=")
})

rapply(list, function(x){
  setNames(x[2] , x[1])
})

# a   b   c 
#"1" "2" "3"

Upvotes: 0

Robert
Robert

Reputation: 5152

Is not clear what you want, but one option:

sepstr<-function(list,sep=",")unlist(strsplit(list, sep, fixed = TRUE))

d=sapply(sepstr(y),sepstr, sep="=")
x=as.numeric(d[2,])
names(x)=d[1,]
x

Or as @thelatemail suggested:

x2=setNames(as.numeric(d[2,]),d[1,])
x2

Upvotes: 2

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