Is it possible to have a multi-line comments in R

Question

I found this old thread  from over a year ago   which explains how come R doesn t support a multi-line comments  like     comment    of PHP  for example    I am wondering if this has been resolved in the past year  or if there are other alternatives    For example  in notepad   with npptor  you can mark a bunch of lines and press ctrl q to mark them all as comments  are there similar solutions for other IDE s

User · Answer

R Studio  and  Eclipse   StatET   Highlight the text and use CTRL SHIFT C to comment multiple lines in Windows  Or  command SHIFT C in OS-X

User · Answer

Put the following into your    Rprofile file   exclude  lt -  function blah         excluded block      Now  you can exclude blocks like follows   stuffiwant  exclude       stuffidontwant     morestuffidontwant

User · Answer

if FALSE            precludes multiple lines from being executed  However  these lines still have to be syntactically correct  i e   can t be comments in the proper sense  Still helpful for some cases though

User · Answer

Unfortunately  there is still no multi-line commenting in R     If your text editor supports column-mode  then use it to add a bunch of  s at once   If you use UltraEdit  Alt c will put you in column mode

User · Answer

No multi-line comments in R as of version 2 12 and unlikely to change  In most environments  you can comment blocks by highlighting and toggle-comment  In emacs  this is  M-x

User · Answer

CTRL SHIFT C in Eclipse   StatET and Rstudio

User · Answer

You can  if you want  use standalone strings for multi-line comments  mdash  I ve always thought that prettier than if  FALSE      blocks  The string will get evaluated and then discarded  so as long as it s not the last line in a function nothing will happen    This function takes a value x  and does things and returns things that  take several lines to explain  doEverythingOften  lt - function x           Non  Comment it out  We ll just do it once for now        if  x  in  1 9              doTenEverythings                doEverythingOnce                 return list           everythingDone   TRUE            howOftenDone   1             The main limitation is that when you re commenting stuff out  you ve got to watch your quotation marks  if you ve got one kind inside  you ll have to use the other kind for the comment  and if you ve got something like  strings with  postrophes  inside that block  then there s no way this method is a good idea  But then there s still the if  FALSE  block    The other limitation  one that both methods have  is that you can only use such blocks in places where an expression would be syntactically valid - no commenting out parts of lists  say   Regarding what do in which IDE  I m a Vim user  and I find NERD Commenter an utterly excellent tool for quickly commenting or uncommenting multiple lines  Very user-friendly  very well-documented   Lastly  at the R prompt  at least under Linux   there s the lovely Alt-Shift-  to comment the current line  Very nice to put a line  on hold   if you re working on a one-liner and then realise you need a prep step first

[r] Is it possible to have a multi-line comments in R?

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