On Thu, 14 Aug 2008, Farley, Robert wrote:
BINGO!
str(SurveyData$direction_)
Factor w/ 2 levels "EASTBOUND
",..: 1 1 1 1 2 2 1 1 2 1 ...
levels(SurveyData$direction_)
[1] "EASTBOUND " "WESTBOUND
"
Was my mistake in how I read the data?
SurveyData <- read.spss("C:/Data/R/orange_delivery.sav",
use.value.labels=TRUE, max.value.labels=Inf, to.data.frame=TRUE)
That brings up 2 more questions:
How do I "trim" the factor names? {or read them correctly}
How do I write to a list the names of factors? {I have another factor
with ~15 "levels" and I'm a REALLY poor typist}
Good guess on the spaces! Comes of having played with a lot of data over
the years and seeing that sort of thing before.
You need sub. There is an example of trimming trailing spaces in the gsub
help page.
So something like:
temp <- sub(' +$', '', SurveyData$direction_)
SurveyData$direction_ <- temp
should do it. You could just replace the direction_ variable without using
temp but it is safer this way and you should check the values of temp
before replacing your original data.
David Scott
_________________________________________________________________
David Scott Department of Statistics, Tamaki Campus
The University of Auckland, PB 92019
Auckland 1142, NEW ZEALAND
Phone: +64 9 373 7599 ext 86830 Fax: +64 9 373 7000
Email: [EMAIL PROTECTED]
Graduate Officer, Department of Statistics
Director of Consulting, Department of Statistics
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