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testdf
2009 Feb 26
2
interpSpline with dates?
Dear R-helpers,
can I use a POSIXct date as the x variable in interpSpline? 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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2009 Jul 23
2
Assigning rank based on total count
Hi all,
I am using ACS micro data (PUMS) with one of the columns as a
factor for the place of birth (POBPF). I would like to create
a column (POBR) containing a rank
corresponding to the place of the observation
in the POBPF rankings. For example,
if a person is from Oregon, Oregon is
the most popular Place of Birth, so each
person who came from Oregon should have a 1
in their POBR.