[R] Arguments for functions

[Spencer Graves]

    If I understood the question correctly, you may also want to include 
"scan" in the function, e.g.: 

 > read2 <- function(){
+   cat("Step1 input=")
+   a <- scan()
+   cat("Step2 input=")
+   b <- scan()
+   list(Step1.input=a, Step2.input=b)
+ }
 > read2()
Step1 input=1: 2
2: 3
3:
Read 2 items
Step2 input=1: "a"
1: "b"
Error in scan() : "scan" expected a real, got ""a""
 > read2()
Step1 input=1: 1
2: 2
3: 3
4:
Read 3 items
Step2 input=1: 2
2: 3
3: 4
4:
Read 3 items
$Step1.input
[1] 1 2 3

$Step2.input
[1] 2 3 4

      hope this helps.  spencer graves

Adaikalavan Ramasamy wrote:

>See "Writing your own functions" (section 10 or page 47) or the
>"Introduction to R" (http://cran.r-project.org/doc/manuals/R-intro.pdf).
>
>On Mon, 2004-09-27 at 12:44, Cornec Matthieu wrote:
>  
>
>>hello,
>>
>>Could you help me to find out how to give arguments to a function step  by
>>step?
>>In others words, if the output depends on inputs given by the user step by
>>step, how R can handle this? 
>>Thanks in advance,
>>
>>Matthieu Cornec
>>
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>>
>>    
>>
>
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-- 
Spencer Graves, PhD, Senior Development Engineer
O:  (408)938-4420;  mobile:  (408)655-4567