Concatenate a vector of strings character

Question

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

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For sdata   gsub         toString sdata     For a vector of integers   gsub         toString c 1 10

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Try using an empty collapse argument within the paste function   paste sdata  collapse        Thanks to http   twitter com onelinetips status 7491806343

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Here is a little utility function that collapses a named or unnamed list of values to a single string for easier printing  It will also print the code line itself  It s from my list examples in R page   Generate some lists named or unnamed     Define Lists ls num  lt - list 1 2 3  ls str  lt - list  1   2   3   ls num str  lt - list 1 2  3      Named Lists ar st names  lt - c  e1   e2   e3   ls num str named  lt - ls num str names ls num str named   lt - ar st names    Add Element to Named List ls num str named e4  lt -  this is added    Here is the a function that will convert named or unnamed list to string   ffi lst2str  lt - function ls list  st desc  bl print TRUE         string desc   if missing st desc        st desc  lt - deparse substitute ls list            create string   st string from list   paste0 paste0 st desc                                        paste names ls list   ls list  sep      collapse           if  bl print       print st string from list          Testing the function with the lists created prior    gt  ffi lst2str ls num   1   ls num  1  2  3   gt  ffi lst2str ls str   1   ls str  1  2  3   gt  ffi lst2str ls num str   1   ls num str  1  2  3   gt  ffi lst2str ls num str named   1   ls num str named e1 1 e2 2 e3 3 e4 this is added    Testing the function with subset of list elements    gt  ffi lst2str ls num str named c  e2   e3   e4      1   ls num str named c   e2      e3      e4     e2 2 e3 3 e4 this is added   gt  ffi lst2str ls num 2 3    1   ls num 2 3   2  3   gt  ffi lst2str ls str 2 3    1   ls str 2 3   2  3   gt  ffi lst2str ls num str 2 4    1   ls num str 2 4   2  3  NULL   gt  ffi lst2str ls num str named c  e2   e3   e4      1   ls num str named c   e2      e3      e4     e2 2 e3 3 e4 this is added

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Another way would be to use glue package  glue collapse glue  quot  sdata  quot    paste glue  quot  sdata  quot    collapse

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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

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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  lt - 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

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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

[r] Concatenate a vector of strings/character

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