[R] Rprintf not updating

Sharpie chuck at sharpsteen.net
Tue Apr 6 02:26:47 CEST 2010

Erik Wright wrote:
> Hi Charlie,
> Thanks, I got it working by looking at your myRunIfConcise function.
> SEXP changePercent(SEXP pBar)
> {
> 	int *rPercentComplete;
> 	SEXP utilsPackage, percentComplete;
> 	PROTECT(utilsPackage = eval(lang2(install("getNamespace"),
> ScalarString(mkChar("utils"))), R_GlobalEnv));
> 	*rPercentComplete = 10; //this value increments
> 	eval(lang4(install("setTxtProgressBar"), pBar, percentComplete,
> R_NilValue), utilsPackage);
> }
> Now I am wondering why the pBar doesn't show initially if the percent
> complete is 0%?
> Thanks again,
> Erik

I did a quick check on the R side of things and txtProgressBars do not
display until after the first call to setTxtProgressBar unless the initial
parameter is set to something other than 0 (possible bug?).  Try executing a
call immediately after creation to set the value to 0.


Charlie Sharpsteen
Undergraduate-- Environmental Resources Engineering
Humboldt State University
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