Converting date in Year.decimal form in R

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The lubridate package has a function, date_decimal that you can use for this.

x <- c(1988.0, 1988.25, 1988.5, 1988.75)
library(lubridate)
(f <- format(date_decimal(x), "%d-%m-%Y"))
# [1] "01-01-1988" "01-04-1988" "02-07-1988" "01-10-1988"

Then you can write it to a csv with

write.csv(f, "afilename.csv")   ## or write.table()

You’ll probably want to check the output first and adjust some of the arguments to whatever format you want.

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