> I have a vector of numbers ranging form 20 to 500. The numbers represent
> days since a starting point. The list is not consecutive, some numbers
> skipped and some numbers duplicated. I know day 1 was a Monday. I want to
> use this vector in a lm but I need to factor by day. I'm wondering how to
> assign "Monday" to 22,29,36,..., Tuesday to 23,30,37,... etc...
Here is one way to do it:
# make some sample data
foo <- c(22,29,23,37)
# convert to factor of weekdays
foo<- factor(foo %% 7, levels=1:7, labels=c('Mon', 'Tue', 'Wed', 'Thu', 'Fri',
'Sat', 'Sun'))
foo
cu
Philipp
--
Dr. Philipp Pagel
Lehrstuhl für Genomorientierte Bioinformatik
Technische Universität München
Wissenschaftszentrum Weihenstephan
Maximus-von-Imhof-Forum 3
85354 Freising, Germany
http://webclu.bio.wzw.tum.de/~pagel/
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