How to collapse a list of characters into a single string in R

Question

There is a list which I would like to output into an excel file as a single string. I start with a list of characters.

  url=\"http://eutils.ncbi.nlm.nih.gov         


        

Answer 1

You can do it with paste function

    > paste(c('A', 'B', 'C'), collapse=', ' )
    [1] "A, B, C"

Answer 2

The shortest method is to use the base toString function. In any case the output string will contain commas

vector<-c('A', 'B', 'C')

toString(vector)

if you don't want commas

gsub(",","",toString(vector))

If you want any other separator you can substitute anything you like in gsub instead of replacing commas with nothing

Answer 3

You can do it with str_c function

> library('stringr')
> str_c(c('A','B','C'),collapse=',')    
[1] "A,B,C"