Message-ID: <440457.84670.qm@web38103.mail.mud.yahoo.com>
Date: 2008-09-08T02:24:36Z
From: Srinivas Iyyer
Subject: extracting max row from data matrix
dear group,
i have a data matrix with some replicate items with different values. I want to extract the row with max value.
for example:
> x
fruit weight
1 apple 1.3
2 apple 1.5
3 apple 1.6
4 orange 1.4
5 orange 1.6
x is a data frame.
I want to extract unique items from fruits that has max weight.
that is:
3 apple 1.6
5 orange 1.6
I want to be able to use apply functions. Could some one lend some help please.
Thanks
srini