Displaying 1 result from an estimated 1 matches for "tp3089231p3089231".
2010 Dec 15
2
Can the by() function return a single column?
...0 whose values x' correspond to x'_1 = x_1 - mean(x | factor1), x'_2
= x_2 - mean(x | factor2),...
Thanks in advance for the help, and apologies for the poor notation.
Vassilis
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