R help - Sep 2007 - Problem with the Aggregate command (PS)

Dear Friends,

I forgot to add, the idea is to aggregate the entire dataset based on year and
get the median value for each of the columns. Hence the output should be like
this

Year    X1   X2    X3 ...............
1991    10    20    30...............
1992    30   20    10...............
1993     4      5      6..............
   .        .    .    .
   .        .    .    .
   .        .    .    .
2005    100    200    300..........


Thanks and Regards

Anup

       
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