[Rd] Carriage returns and Sweave output

Ernest Turro ernest.turro at ic.ac.uk
Tue Mar 20 20:02:51 CET 2007

On 20 Mar 2007, at 13:24, Douglas Bates wrote:

> [snip]

> In cases like this capture.output() is your friend.  Write one code
> chunk with results=hide,echo=FALSE that uses capture.output to trap
> the desired output as character strings then use string manipulation
> functions to do the desired replacement.  A second code chunk with
> eval=FALSE shows the code that apparently produces the output and a
> third code chunk with echo=FALSE uses cat on the manipulated character
> strings with quote=FALSE to show what apparently was produced.

That is extremely helpful. Thanks very much Douglas.


>> >>>> Ernest Turro wrote:
>> >>>>> Dear all,
>> >>>>> I have a code chunk in my Rnw file that, when executed, outputs
>> >>>>> carriage return characters ('\r') to inform on the progress  
>> (e.g.
>> >>>>> "sweep 4 of 1024\r"). But Sweave interprets this as a newline
>> >>>>> character, and therefore I get countless pages of output in my
>> >>>>> vignette where I only really want one line. Any ideas?
>> >>>>> Thanks
>> >>>>> E
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