Grokbase Groups R r-help April 2002
FAQ

On Wed, Apr 24, 2002 at 10:11:18AM +0200, Yannick Wurm wrote:
Hi!
I'm having a small problem with an assignment I have to do.
We want to do an anova on some values, given for four
different types of medicine. The different sample numbers are
not identical (eg for molecule A we have 8 values, for B we have
14, etc.).
What would the most elegant way of getting this info into R
to do an lm be? I usually try to use data.frames but R
categorically refuses to combine the values (i scan()'d them
into four vectors) because their row numbers aren't identical.
(even if I do check.rows = FALSE).

Thanks for your help,

Yannick

------------------------------------
yannick.wurm at insa-lyon.fr
http://homepage.mac.com/yannickwurm/
tel: 06.16.41.71.92 icq: 22044361

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It looks like a job for 'factor'...

The following R command should help you to figure out how...


help(factor)
data(InsectSprays)
help(InsectSprays)




Hopin' it helps,




Laurent





--------------------------------------------------------------
Laurent Gautier CBS, Building 208, DTU
PhD. Student D-2800 Lyngby,Denmark
tel: +45 45 25 24 85 http://www.cbs.dtu.dk/laurent
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