Concatenate a vector of strings/character

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If I have a vector of type character, how can I concatenate the values into string? Here's how I would do it with paste():

sdata = c('a', 'b', 'c')
paste(sdata[1], sdata[2], sdata[3], sep ='')

yielding "abc".

But of course, that only works if I know the length of sdata ahead of time.

Try using an empty collapse argument within the paste function:

paste(sdata, collapse = '')

Thanks to http://twitter.com/onelinetips/status/7491806343

Concatenate a vector of strings/character, Try using an empty collapse argument within the paste function: paste(sdata, collapse = ''). Thanks to� Example 1: Concatenate Vector of Character Strings with paste Function Typically, character strings are concatenated with the paste function. In order to add several strings together, we need to specify a certain separator for the collapse option within the paste function.

Matt's answer is definitely the right answer. However, here's an alternative solution for comic relief purposes:

do.call(paste, c(as.list(sdata), sep = ""))

paste, Concatenate Strings. Description. Concatenate vectors after converting to character. Usage. paste (, sep = " ", collapse = NULL� To concatenate the vector of characters/strings into a single string, we can use the paste () function by passing collapse= '' as the second argument in R programming language.

You can use stri_paste function with collapse parameter from stringi package like this:

stri_paste(letters, collapse='')
## [1] "abcdefghijklmnopqrstuvwxyz" 

And some benchmarks:

require(microbenchmark)
test <- stri_rand_lipsum(100)
microbenchmark(stri_paste(test, collapse=''), paste(test,collapse=''), do.call(paste, c(as.list(test), sep="")))
Unit: microseconds
                                      expr     min       lq     mean   median       uq     max neval
           stri_paste(test, collapse = "") 137.477 139.6040 155.8157 148.5810 163.5375 226.171   100
                paste(test, collapse = "") 404.139 406.4100 446.0270 432.3250 442.9825 723.793   100
do.call(paste, c(as.list(test), sep = "")) 216.937 226.0265 251.6779 237.3945 264.8935 405.989   100

Concatenate Strings, If the arguments are vectors, they are concatenated term-by-term to give a character vector result. If a value is specified for collapse , the values in the result are then concatenated into a single string, with the elements being separated by the value of collapse . The plus symbol does the same: "a"+"b" is the same as strcat ( ["a","b"]). If size of vector_of_strings is one, it returns txt=vector_of_strings (1); strcat ('A','B') returns 'A' and not 'AB' as strcat ( ['A','B'])

For sdata:

gsub(", ","",toString(sdata))

For a vector of integers:

gsub(", ","",toString(c(1:10)))

Join multiple strings into a single string — str_c • stringr, Optional string used to combine input vectors into single string. Value. If collapse = NULL (the default) a character vector with length equal to the longest input� String concatenation in Julia is a way of appending two or more strings into a single string whether it is character by character or using some special characters end to end. There are many ways to perform string concatenation. It is used to concatenate different strings and/or characters into a

Matt Turner's answer is definitely the right answer. However, in the spirit of Ken Williams' answer, you could also do:

capture.output(cat(sdata, sep="")) 

Concatenate a vector of strings/character, To concatenate characters of a vector, you can use the collapse argument inside the paste function as follows: In your case: sdata = c('a', 'b', 'c'). paste(sdata� The CONCAT function accepts two or more string arguments and returns the combination of such strings as a single expression. STRING CONCATENATION :You can use the set operator to concatenate two strings or a string and a character, or two characters. Or (maybe) better, use a StringBuilder.

What happens here is that you first concatenate the elements of each vector with an underscore (that is, A_1, B_2, and so on), and then you collapse the results into a single string with — between each element. The paste () function takes vectors as input and joins them together.

If any input is a cell array, and none are string arrays, then the result is a cell array of character vectors. If all inputs are character arrays, then the result is a character array. For character array inputs, strcat removes trailing ASCII white-space characters: space, tab, vertical tab, newline, carriage return, and form feed.

View MATLAB Command. Create two character vectors, with the first character vector having a trailing whitespace character. chr1 = 'Hello ' ; chr2 = 'World'; Combine them into one character vector. chr3 = append (chr1,chr2) chr3 = 'Hello World'.

Comments
  • Just a note that if sdata can contain either strings which are all of the same length or of variable lengths then paste(sdata, sep = '', collapse = '') should be used to avoid unexpected results.
  • you really could have worked an apply() statement in there. If you do I'll up vote you ;)
  • this would actually be the most elegant solution if the collapse parameter didn’t exist. so not much comedic relief if you recently actually had to do something very similar :)
  • I had never performed benchmarks on R. Nice to learn something new.
  • This is a dangerous answer -- if there are comma-space sequences in the elements of the vector, this answer will remove them.