On Aug 27, 2010, at 3:29 PM, Toby Gass wrote:
Hello, helpeRs,
I have a vector of numbers from 1-365 (days of the year) that I would
like to convert to a date. There are no NA's and no missing values.
I did not insert leading zero's for numbers less than 100.
Using the syntax:
dat$doy.1 <- as.numeric(format(dat$doy, "%j" ))
That would not make a date. Try:
dat$doy.1 <- as.Date("2010-01-01") + dat$doy -1
I get the following error message:
Error in prettyNum(.Internal(format(x, trim, digits, nsmall, width,
3L, :
invalid 'trim' argument
.What is the error message telling me?
(Windows OS and R 2.11.1)
?format
... about its efforts to turn a string "%j" into a logical which is
what a two argument call to format() without named arguments would be
expecting in the second position.
David Winsemius, MD
West Hartford, CT
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