[R] Analyze each factor separtely

[kickout]

Hello....

Trying to apply a model to each level of a factor

For example, i have three levels of a variable I call 'Code'...I want to
model the data under each level of code differently...I've attached a sample
data set... http://r.789695.n4.nabble.com/file/n3913431/data.txt data.txt 

I.E for code 0HY0 I want to model y~ 1|strain + 1|code  *both code and
strain are random effects...
for code 0HY1 run a separate model with different y's.... y~ 1|strain +
1|code


tapply does not work (or rather i cannot get it to work)

In SAS i would simply use
PROC MIXED data=data;
by code;
model y=;
random code strain /solution;
run;



Not so easy in R?

thanks!




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