[Rd] capture.output(), truncated last output without \n (PR#10534)

phgrosjean at sciviews.org phgrosjean at sciviews.org
Sat Dec 29 12:15:26 CET 2007

Full_Name: Philippe Grosjean
Version: 2.6.1
OS: MacOS X; Windows XP
Submission from: (NULL) (

Last output from capture.output() is truncated if it does not end with a
carriage return:

> capture.output(cat("text\n"))  # Fine
[1] "text"
> capture.output(cat("text"))    # Missing output!
> capture.output({cat("text");1+1})  # Only last output is affected
[1] "text[1] 2"

Proposed patch: add a carriage return before exiting capture.output():

capture.output <-
function (..., file = NULL, append = FALSE) {


        for (item in tmp) if (item$visible) 
    cat("\n")  ### ADD THIS!

This changes the behavior of capture.output() a little bit, since it adds "" at
the end of regular outputs, but it solves the problem and it allows to detect if
last output line was ended by \n, or not.


Philippe Grosjean
platform       i386-apple-darwin8.10.1     
arch           i386                        
os             darwin8.10.1                
system         i386, darwin8.10.1          
major          2                           
minor          6.1                         
year           2007                        
month          11                          
day            26                          
svn rev        43537                       
language       R

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