[R] cat and positioning of the output

[Michael H. Prager]

It works on Windows (rgui.exe) with this change:

 for ( i in 1:10 ) { cat("Number",i,"\r"); flush.console(); Sys.sleep(1) 
}; cat("\n")

MHP


on 6/29/2006 4:33 PM Dan Gunter said the following:
> =?ANSI_X3.4-1968?Q?J=3Frn_Schulz?= wrote:
>   
>> Hello R users!
>>
>> I like to use cat in a loop. I know, loops are not the best way in R ... but
>> my question: It is possible to overwrite the expression "Reading row: i" in
>> each iteration of the loop (print out in the below loop on the screen) or
>> more particulary to overwrite the counter "i".
>>
>> for(i in 1:header$M){
>>    cat("Reading row: ", i)
>>    SparseIndex[[i]] <- readBin( con, integer(), n=MIndexNumber[i], size=4 )
>>    SparseSignal[[i]] <- readBin( con, numeric(), n=MIndexNumber[i], size=4 )
>> }
>>
>> Many thanks
>> J?rn Schulz.
>>   
>>     
> On a UNIX terminal, adding '\r' will cause the cursor to go back to the 
> beginning of the same line. I can't speak for Windows.
>
> e.g.
>
> for ( i in 1:10 ) { cat("Number",i,"\r"); Sys.sleep(1) }; cat("\n")
>
> -Dan
>
>   

-- 
Michael Prager, Ph.D.
Southeast Fisheries Science Center
NOAA Center for Coastal Fisheries and Habitat Research
Beaufort, North Carolina  28516
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