R help - Feb 2004 - a loop question

I want to get three .gif image files test.1.gif,
test.2.gif, & test.3.gif by using a loop. The code I
tried  is like this:
      x=c(0, 1, 2, 3, 4)
      y=c(1, 2, 3, 4)
      for(i in 1:3)
      {
        x11()
        jpeg("test.i.gif")
        plot(x, y)
        dev.off()

      } 
but I only could get one image file, test.i.gif. How
can I get three image files?

Thanks.

On Fri, 27 Feb 2004 13:09:40 -0800 (PST) Susan Lin wrote:
> I want to get three .gif image files test.1.gif,
> test.2.gif, & test.3.gif by using a loop. The code I
> tried  is like this:
>       x=c(0, 1, 2, 3, 4)
>       y=c(1, 2, 3, 4)
>       for(i in 1:3)
>       {
>         x11()
>         jpeg("test.i.gif")
This should be

jpeg(paste("test.", i, ".gif", sep = ""))

also look at help(paste).

hth,
Z
>         plot(x, y)
>         dev.off()
> 
>       } 
> but I only could get one image file, test.i.gif. How
> can I get three image files?
> 
> Thanks.
> 
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> -----Original Message-----
> From: r-help-bounces at stat.math.ethz.ch
> [mailto:r-help-bounces at stat.math.ethz.ch] On Behalf Of Susan Lin
> Sent: Saturday, February 28, 2004 10:10 AM
> To: R-help at stat.math.ethz.ch
> Subject: [R] a loop question
>
> I want to get three .gif image files test.1.gif,
> test.2.gif, & test.3.gif by using a loop. The code I
> tried  is like this:
>       x=c(0, 1, 2, 3, 4)
>       y=c(1, 2, 3, 4)
>       for(i in 1:3)
>       {
>         x11()
>         jpeg("test.i.gif")
>         plot(x, y)
>         dev.off()
>
>       }
> but I only could get one image file, test.i.gif. How
> can I get three image files?
How about (I haven't tried it) something like:
  jpeg(paste("test.", i, ".gif", sep = "")

--------------------------------------------
Ko-Kang Kevin Wang, MSc(Hon)
SLC Stats Workshops Co-ordinator
The University of Auckland
New Zealand


--------------------------------------------
Ko-Kang Kevin Wang, MSc(Hon)
SLC Stats Workshops Co-ordinator
The University of Auckland
New Zealand