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2009 Feb 26
2
interpSpline with dates?
...pSpline? The help
page says x and y need to be numeric... is there a workaround?
example:
library(splines)
testdfr <- data.frame(Date=seq(as.POSIXct("2008-08-01"),as.POSIXct("2008-09-01"),
length=10))
testdfr$yvar <- rnorm(10)
sp <- interpSpline(yvar ~ Date, testdfr)
preddfr <- data.frame(Date=as.POSIXct("2008-08-02"))
predict(sp, preddfr)
thanks,
Remko
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Remko Duursma
Post-Doctoral Fellow
Centre for Plant and Food Science
University of Western Sydney
Hawkesbury Campus
Richmond NSW 2753
Dept of Biologic...