How to create date from datetime (using lubridate)?

Question

Assume I have created a variable containing date and time: ``` a <- ymd_hms("2014-01-01 12:23:34") ``` How do I create another variable that only has the date? That is, what should I do to transform `a`'s value to be identical to `b`'s value where `b` is ``` b <- ymd("2014-01-01") ```

Accepted Answer

You can just use `round_date`

```
round_date(a, "day")
[1] "2014-01-02 UTC"
```

EDIT

You do need to be careful with rounding the time though. For complete equivalence here you would need to use `floor_date`.

```
identical(ymd("2014-01-01"), floor_date(a, "day"))
[1] TRUE
```

How to create date from datetime (using lubridate)?

Solution

Problem