[R] Printting 'for' and 'while' indices

[Spencer Graves]

      Consider the following: 

 > i <- 0
 > while(i < 5) {
    "do stuff"
    print(i)
    i <- i + 1
}
[1] 0
[1] 1
[1] 2
[1] 3
[1] 4
 > i <- 0
 > while(i < 5) {
    "do stuff"
    cat(i, "")
    i <- i + 1
}
0 1 2 3 4 > i <- 0
 > while(i < 100) {
    "do stuff"
    if((i %% 10) == 0)
        cat(i, "")
    i <- i + 1
}
0 10 20 30 40 50 60 70 80 90

      This was produced in S-Plus 6.2 under Windows 2000.  For some 
reason, when I copy this code from S-Plus to R1.8.1 via XEmacs, this is 
locking up R for me right now, and I can't figure out why.  However, I 
see no reason why these constructs would not work in R. 

      hope this helps. 
      spencer graves

Marcos Sanches wrote:

>Sorry, I forgot to correct the message subject, so I am resending my
>doubt it below:
>
>
> Hi all!
>
> I wrote a very basic program in R, which has some loops ('for' and
>'while').  Is there a way to print the 'for' (or while) indice while the
>program is running so that I am able to estimate where the program is
>and how long it will last?
>
>I mean, I want something like this:
>
>i<-0
>While(i<100){
>"do a lot of commands"
>"print i"
>i<-i+1
>}
>
>How do I "print" the "i" at each step?
>
>Thanks in advance,
>
>Marcos
>
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