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balh
2005 Jun 26
1
better code?
Hi, Laura:
How about the following:
> sapply(x1.df, class)
d x y
"factor" "numeric" "numeric"
> (byLH <- by(x1.df[-1], x1.df$d, var))
x1.df$d: 1/1/2005
x y
x 1.272688 -0.783719
y -0.783719 0.884866
-------------------------------------------------------------
x1.df$d: 1/15/2005
x y
x 0.9992097 0.8719848
y 0.8719848 0.7753879
-------------------------------...