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ghg
2012 Jun 07
2
flagging values without a loop
...ag the highest price in a given hour. Is there a way to
do this without a loop?
matrix:
Unit, Day, Hour, Price, Flag
afd1 1/2/2003 1 1 N
afd1 1/2/2003 1 2 N
afd1 1/2/2003 1 3 N
afd1 1/2/2003 1 4 Y
dcf1 1/2/2003 2 2 N
dcf1 1/2/2003 2 3 Y
dcf1 1/2/2003 2 1 N
dcf1 1/2/2003 2 2 N
dcf1 1/2/2003 2 3 Y
ghg2 1/2/2003 3 1 N
afd1 1/2/2003 3 2 N
.....
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