R dates "origin" must be supplied

Question

My code:

axis.Date(1,sites$date, origin="1970-01-01") 

Error:

Error in as.Date.numeric(x) : 'origin' must be supplied

Why is it asking me for the origin when I supplied it in the above code?

Answer 1

I suspect you meant:

axis.Date(1, as.Date(sites$date, origin = "1970-01-01")) 

as the 'x' argument to as.Date() has to be of type Date.

As an aside, this would have been appropriate as a follow-up or edit of your previous question.