as.date 在 Jupyter Books 的 R 脚本中不起作用

Question

I have been writing code in R studio and tried to move it over to Jupyer Books to share it with people.

The code all works in R studio but when I run it in Jupyer Books, as.date() does not convert the date column which begins as a factor into a date which then means I have no data when I subset by date later on.

Has anyone had this happen and know a solution? Or will I just need to use lubridate or similar to convert the date?

Thanks, Dave

Answer 1

My guess is that you are running different R versions in both places. Run R.version.string at both the places to check which version of R you are running at each of them. Since R 4.0.0 the default behaviour of R changed when importing string data into R. Previously they were imported as factors and now (since 4.0.0) they are imported as characters.

The solution is to import your dataset with stringsAsFactors = FALSE in both the places to see the same output at both the places.

data <- read.csv('filename.csv', stringsAsFactors = FALSE)