[R] SORTING Arrays by index value

[Mark G Orr]

Hello, I'm somewhat new to R.  I've searched the archive for the last year
and tried to consult the manual pages for the following problem, but did
not find an answer.

I want to sort an array by the index values.  Here is the array

>acc.gp.bl.wtmn
        Gp17       Gp4
1  0.5703125 0.6406250
10 0.7812500 0.7109375
11 0.8046875 0.7343750
12 0.8359375 0.7890625
13 0.8515625 0.7109375
14 0.8281250 0.7343750
15 0.8671875 0.7812500
16 0.8125000 0.7578125
17 0.7734375 0.7500000
18 0.8000000 0.7800000
19 0.8700000 0.7300000
2  0.8046875 0.7265625
20 0.8300000 0.7400000
21 0.7500000 0.8000000
22 0.7700000 0.7600000
23 0.8200000 0.7800000
24 0.7600000 0.7400000
25 0.8100000 0.8000000
3  0.7578125 0.7812500
4  0.8203125 0.7890625
5  0.7890625 0.7421875
6  0.7265625 0.7812500
7  0.8125000 0.7421875
8  0.8515625 0.7265625
9  0.8203125 0.6953125

My question is:  How do I sort by the first index (the values are 1:25)
without losing the associated values per index value for the two
columns(Gp17 and Gp4).  I want ascending order (1:25) of the index values.

Thank you in advance.

-Mark Orr



Postdoctoral Fellow
Psychology Dept.
Carnegie Mellon Univ.
Pittsburgh, PA 15213