[R-pkg-devel] Warning 'as.data.frame.POSIXct()' is deprecated

[Tim Taylor]

This *may* be an issue in lapply.  Let's see what others day. Reprex below

Sys.setenv("_R_CHECK_AS_DATA_FRAME_EXPLICIT_METHOD_" = TRUE)
dat <- Sys.Date()
as.data.frame(dat)
#>          dat
#> 1 2023-07-06
lapply(dat, as.data.frame)
#> Warning: Direct call of 'as.data.frame.Date()' is deprecated.  Use
#> 'as.data.frame.vector()' or 'as.data.frame()' instead
#> [[1]]
#>       X[[i]]
#> 1 2023-07-06

Tim

On 06/07/2023 08:54, Vincent van Hees wrote:
> Dear all,
>
> I see the following warning in my package test results:
>
> ```
> Warning
> Direct call of 'as.data.frame.POSIXct()' is deprecated.  Use
> 'as.data.frame.vector()' or 'as.data.frame()' instead
> ```
>
> The warning is not always there and I struggle to make it reproducible. I
> have encountered it in both Ubuntu 22.04 and in Windows 11, in both R 4.3.0
> and 4.3.1, in both RStudio and in an GitHub Actions environment (example
> <https://github.com/wadpac/GGIR/actions/runs/5463862340/jobs/9945096566>).
> The warning gives the impression that I am doing something that R no longer
> supports. However, I am not using the command as.data.frame.POSIXct()
> anywhere directly in my code.
>
> When I dive into the code where the warnings occur I see patterns like:
>
> ```
> now = Sys.time()
> df = data.frame (time = seq(now, now + 10, by =1),  B  = 1:11)
> ```
>
> (this is a simplification of for example:
> https://github.com/wadpac/GGIR/blob/master/tests/testthat/test_read.myacc.csv.R
> )
>
> Does this mean I am discouraged from putting a vector with POSIXct values
> in a data.frame?
> If yes, what would be the recommended work around?
>
> I have been trying to find documentation or online discussions about this
> warning but no luck so far. I see R NEWS
> <https://cran.r-project.org/doc/manuals/r-release/NEWS.html> mentions
> updates to POSIXct related objects several times in the past year but those
> seem to be different issues.
>
> Best,
>
> Vincent
>
> 	[[alternative HTML version deleted]]
>
> ______________________________________________
> R-package-devel using r-project.org mailing list
> https://stat.ethz.ch/mailman/listinfo/r-package-devel