lubridate error message 'incompatible method's when trying date arithmetic
Posted
by
Sharon
on Stack Overflow
See other posts from Stack Overflow
or by Sharon
Published on 2013-08-18T13:35:20Z
Indexed on
2013/10/22
3:54 UTC
Read the original article
Hit count: 592
I'm trying to learn lubridate. The lubridate documentation shows:
date <- ceiling_date(date, "month") - days(1)
[1] "2010-05-31 UTC
for date arithmetic. But if I try
mytoday <- now()
first_of_month <- floor_date(mytoday, "month")
first_of_month_last_year <- first_of_month - years(1)
to use date arithmetic to get the first of the month a year earlier I get an error message
Warning message:
Incompatible methods ("-.POSIXt", "Ops.ordered") for "-"
Any ideas what I'm doing wrong? Thanks.
© Stack Overflow or respective owner
