Hi Stephen,
Maybe it is just me, but I am not clear what your question is. scan()
is a function with a variety of arguments. When these are not
explicitly named, they go in order. So, scan(1, 2, 3, 4, 5) is
equivalent to scan(file = 1, what = 2, nmax = 3, n = 4, sep = 5),
which is clearly nonsense. If you are wondering what a use of scan
is, here is an example where input to the console is scan()ed and
assigned to 'x'.
> x <- scan()
1: 1 2 3 4 5
6:
Read 5 items> x
[1] 1 2 3 4 5
HTH,
Josh
On Tue, Aug 17, 2010 at 8:42 PM, Stephen Liu <satimis at yahoo.com>
wrote:> Hi folks,
>
>
> I followed an online example to input data;
>
>> x = scan(1,2,3,4,5)
> Error in scan(1, 2, 3, 4, 5) :
> ?either specify 'nmax' or 'n', but not both.
>
> It can't work.
>
>
>> x = c(1,2,3,4,5)
>> x
> [1] 1 2 3 4 5
>
> It works.
>
>
> Whether "scan" is replaced with "c" ?
>
>> ?c
> .....
> Usage:
> ? ? c(..., recursive=FALSE)
>
>
> TIA
>
>
> B.R.
> Stephen L
>
>
>
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>
--
Joshua Wiley
Ph.D. Student, Health Psychology
University of California, Los Angeles
http://www.joshuawiley.com/