If your data is in a dataframe or matrix and 'grp' is the name of the
columns that you want to select then you can do the following:
> x <- data.frame(a=1:10, b=21:30, c=31:40, d=41:50)
> x
    a  b  c  d
1   1 21 31 41
2   2 22 32 42
3   3 23 33 43
4   4 24 34 44
5   5 25 35 45
6   6 26 36 46
7   7 27 37 47
8   8 28 38 48
9   9 29 39 49
10 10 30 40 50
> x.sel <- c('d', 'a')
> x[, x.sel]
    d  a
1  41  1
2  42  2
3  43  3
4  44  4
5  45  5
6  46  6
7  47  7
8  48  8
9  49  9
10 50 10
>

If they are the row names, then just reverse the indexing.

On 7/4/06, Sumanta Basak <r_econometrics@yahoo.co.in> wrote:
>
> Hi All,
>
> I have 500 variables time series data for 10 years data. I have sorted 10
> out of them according to them. Now my group is giving character string. But
> i want to fetch those varaible data from theoriginal data. How can i do
> this?
>
> Suppose, total is the data of 500*1500 data. Now i sort 10 variables.
>
> >grp
> >"A41" "A48","A489"
>
> Now how can i fetch only these three variable data from original data?
>
> Thanks,
> Sumanta.
>
>
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