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schoolvals
2009 Feb 09
1
question about mean
Hello, everyone,
I have a matrix like following:
school value
A .1
A .2
A .15
A .2
B .3
B .5
C .3
C .3
C .4
C .5
C .6
C .9
C 1
I want to get the mean 'value' for each 'school', but each school has
different length. Is there any way to do this fast? Because my