[R] linear coefficient combination stderr?

[Søren Højsgaard]

Try the esticon function in the doBy package.
Regards
Søren

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Fra: r-help-bounces at stat.math.ethz.ch på vegne af ivo welch
Sendt: on 14-02-2007 04:21
Til: r-help
Emne: [R] linear coefficient combination stderr?



dear r-experts---I have scrounged around in google (searching r-help)
for the really obvious, but failed.  could someone please point me to
whatever function computes the standard error of a linear combination
of the coefficients?

m=lm( y ~ x1 + x2 + x3 );
t.stat= (coef(m)[2]+coef(m)[3])) / mystery.function( m, x2 + x3 );

obviously, this does not work, but hopefully explains my intent.
quick pointer appreciated.

regards,

/iaw

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