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HOW TO REMOVE MTEXT FROM PLOT, plotting changing populations with titles in loop

3 messages · prinzOfNorway, Sarah Goslee, Uwe Ligges

prinzOfNorway
# 
is there a way to hide/undraw mtext (or lines etc.) in a loop like

plot(runif(10))
iterCol <- rainbowPalette(10)

for(i in 1:10){

mtext(paste("this is iteration ", i, sep=""))
points(runif(10),col=iterCol[i])
Sys.sleep(1)

## UNDRAW/HIDE the text so that it does not mess up the plot in the next
iteration

}



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Sarah Goslee
# 
It's not perfect, but you could use:

mtext(paste("this is iteration ", i, sep=""), col="white")

to overwrite it, or polygon() to draw a white rectangle over the text each time.

Sarah
On Wed, Nov 2, 2011 at 3:15 PM, prinzOfNorway <torgrimsby at gmail.com> wrote:

  
    

      
      
    

  


  


      

    

    

      
      

        


  

        

      Uwe Ligges
    

    

      
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On 02.11.2011 20:29, Sarah Goslee wrote:

            

      
      
      
    

        
The question is if it is not better to do the whole plot again and just 
add the one text in the end. At least if you want to plot into  non 
screen device: You end up with ll those layers of text in the output 
that makes it larger and additionally slows down the rendering of the 
whole plot.

Uwe Ligges