[R] help on retrieving output from by( ) for regression

TEMPL Matthias Matthias.Templ at statistik.gv.at
Thu Aug 25 14:57:16 CEST 2005


Look more carefully at 
?lm 
at the See Also section ...

X <- rnorm(30)
Y <- rnorm(30)
lm(Y~X)
summary(lm(Y~X))

Best,
Matthias


> Hi all 
> 
> I used a function 
> > qtrregr <- by(AB, AB$qtr, function(AB) lm(AB$X~AB$Y))
> 
> objective is to run a regression on quartery subsets in the 
> data set AB, having variables X and Y, grouped by variable qtr.
> 
> Now i retrieved the output using qtrregr, however it only 
> showed the coefficients (intercept and B) with out 
> significant levels and residuals for each qtr. Can some on 
> help me on how can retrieve the detailed regression output.
> 
> rgds
> 
> snvk
> 
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