[R] automatic levels
mlennert at ulb.ac.be
Fri Apr 6 14:54:48 CEST 2001
I've imported a csv, semi-colon spearated file with read.csv2,
containing one column of rownames and one column of floating point
numbers. When I look at the column of data with framename$columnname, I
get the values of the column plus level values. Are these level values
created automatically ?
The problem is when I try to calcluate the correlation coefficient
between this set of data and another with lm(x~y), the result indicates
that each level seems to have been used as independent variable, making
my results unusable.
How can I suppress the automatic creation of these levels ? Or how can I
model with lm() without the levels interfering ?
I've been trying to find the response in some of the manuals, but
haven't been able to, so if someone could just point me to the right
Thank you !
P.S. I'm not subscribed to the list so I would aprreciate cc's to my
Chargé de recherche
IGEAT - ULB
email: mlennert at ulb.ac.be
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