extracting max row from data matrix

Hi Srini,

This may be as simple as tapply(weight,fruit,max)

or t(that) if you want it as you specified.

--Adam

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

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extracting max row from data matrix

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