R help - Feb 2009 - pause in function execution

I would like to have a function which gets data, does a calculation  
and prints a result and then waits some number of seconds and  
repeats.  If I use Sys.sleep, the execution is pausing but the  
function output is buffered so that it all comes out when the function  
terminates.  How can I get output while the function continues to  
execute?

I am not too sure what your question is, but try

?debug

or take a look at http://www.ats.ucla.edu/stat/r/library/R-debug-tools.pdf

On Feb 10, 9:07?am, Fuchs Ira <irafu... at gmail.com>
wrote:
> I would like to have a function which gets data, does a calculation ?
> and prints a result and then waits some number of seconds and ?
> repeats. ?If I use Sys.sleep, the execution is pausing but the ?
> function output is buffered so that it all comes out when the function ?
> terminates. ?How can I get output while the function continues to ?
> execute?
>
> ______________________________________________
> R-h... at r-project.org mailing
listhttps://stat.ethz.ch/mailman/listinfo/r-help
> PLEASE do read the posting guidehttp://www.R-project.org/posting-guide.html
> and provide commented, minimal, self-contained, reproducible code.

On 09/02/2009 5:07 PM, Fuchs Ira wrote:
> I would like to have a function which gets data, does a calculation  
> and prints a result and then waits some number of seconds and  
> repeats.  If I use Sys.sleep, the execution is pausing but the  
> function output is buffered so that it all comes out when the function  
> terminates.  How can I get output while the function continues to  
> execute?
Turn off buffering.  In Windows, this is a menu item. Presumably it's 
possible on whatever platform you're using.

Duncan Murdoch

I tried using the command-line and indeed it does not buffer so that,  
for example:

for (i in 1:5) {
print(x)
Sys.sleep(3)  }

does as expected.

However, the following sleeps for 15 seconds and then produces no  
output:

library("quantmod")

for (i in 1:5) {
getQuote("AAPL")
Sys.sleep(3)  }

Why is that?

Thanks.




On Feb 9, 2009, at 8:04 PM, Rolf Turner wrote:
>
> On 10/02/2009, at 1:46 PM, Fuchs Ira wrote:
>
>> The binary in R.app starts the GUI. I suppose I would have to install
>> the command-line version separately.
>
> On my machine there is a ``file'' /usr/bin/R which is actually a  
> symbolic
> link to /Library/Frameworks/R.framework/Resources/bin/R.
>
> The latter is an executable shell script.
>
> At the command line in a window you should be able to just type
>
> 	R
>
> or (if /usr/bin is not in your path)
>
> 	/usr/bin/R
>
> or (if the symbolic link is not present in /usr/bin)
>
> 	/Library/Frameworks/R.framework/Resources/bin/R
>
> and get R going.  In such a way as not to invoke the AQUA GUI.
>
> If this doesn't work, I'm afraid I'm out of ideas.
>
> If the last option works, then you should create the symbolic link  
> in /usr/bin
> (and make sure that /usr/bin is in your path).  Then you'll be able  
> to start
> simply by typing ``R''.
>
> 	cheers,
>
> 		Rolf Turner
>
>
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