[R] skip reading a file.

[Kenn Konstabel]

You might use dir() to get the file names (if they are in the same
folder), or something like dir(pattern="^file.*") if you want to read
only some files from there. Then for storing the result as something
like store[i,j] as in your example, you could split the file name
using something like strsplit(filename, "_") and use the resulting
components for i and j.

Best regards,
Kenn

On Tue, May 24, 2011 at 1:00 PM, Alaios <alaios at yahoo.com> wrote:
> Dear all,
> I would like to do read a bunch of files that have the following format
>
> file_i_j
> examples:
> file_1_1
> file_1_2
> file_1_3
> file_2_1
> file_2_2
> file_3_1
> file_3_2
> file_3_3
> file_3_4
> file_4_1
> file_4_2
>
> The integer i goes from 1 to 100
> and the integer j starts from 1 and stops somewhere between 1 and 100, which I do not know in advance
>
> Usually I would be able to solve this by having a nested loop
>
> (algorithmic syntax below, not sure if is R okay)
> for i in (c(1:100))
>  for j in (c(1:100))
>    store[i,j]<- read file_i_j
>   end
> end
>
> the problem with that is that R will halt when j take a value that refers to a non existing value. Thus I want to have a good way to break the nested loop and continue with the outer one. How I can do that?
>
> Best Regards
> Alex
>
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