Toby,
What is it that you're trying to accomplish?
There seems to be several ideas confused in your post.
It sounds like you have input
x <- 1:365
and you want to call some function to return dates?
Which date should be returned for input 1?
January 1, 2010?
Your error is because if you give format a numeric
vector, the second argument is "trim", which needs
to be TRUE or FALSE, and you're giving it "%j",
which I can only assume to be an attempt to pass
one of the ?strptime format specifiers to the function.
But those come into play when you're trying to format
a Date to a character string, which is not what you have
at all.
So please give a reproducible example (we don't have
your 'dat' object, for instance) that we can run on
our own to get a good answer to you.
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" ))
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)
Thank you.
Toby
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and provide commented, minimal, self-contained, reproducible code.
