R Comment out block of code

Question

Possible Duplicate    R  Multiline Comment Workarounds        I want to comment out several lines of code in R  Is there any way of doing it without having to put a   before each line - sort of like    blocked out code    in SAS

User · Answer

A sort of block comment uses an if statement   if FALSE      all your code     It works  but I almost always use the block comment options of my editors  RStudio  Kate  Kwrite

User · Answer

Most of the editors take some kind of shortcut to comment out blocks of code   The default editors use something like command or control and single quote to comment out selected lines of code   In RStudio it s Command or Control     Check in your editor   It s still commenting line by line  but they also uncomment selected lines as well   For the Mac RGUI it s command-option    I m imagining windows is control option    For Rstudio it s just Command or Control   Shift   C again   These shortcuts will likely change over time as editors get updated and different software becomes the most popular R editors  You ll have to look it up for whatever software you have

User · Answer

I have dealt with this at talkstats com in posts 94  101  amp  103 found in the thread  Share Your Code   As others have said Rstudio may be a better way to go   I store these functions in my  Rprofile and actually use them a but to automatically block out lines of code quickly   Not quite as nice as you were hoping for but may be an approach

User · Answer

Wrap it in an unused function    f   function         unwanted code here

User · Answer

I use RStudio or Emacs and always use the editor shortcuts available to comment regions  If this is not a possibility then you could use Paul s answer but this only works if your code is syntactically correct   Here is another dirty way I came up with  wrap it in scan   and remove the result  It does store the comment in memory for a short while so it will probably not work with very large comments  Best still is to just put   signs in front of every line  possibly with editor shortcuts    foo  lt - scan what  character   These are comments These are still comments Can also be code  x  lt - 1 10 One line must be blank  rm foo

[r] R: Comment out block of code

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