[R] foreign package read.spss() and NA levels
||gge@ @end|ng |rom @t@t|@t|k@tu-dortmund@de
Fri Jun 4 11:57:26 CEST 2021
On 27.05.2021 12:27, Allen, Justin wrote:
> Hi All,
> Wanted to report what may be a bug or possibly an oversight, but I am unsure, in the "foreign" packages in the read.spss() command, https://cran.r-project.org/web/packages/foreign/index.html. When running the following code,
> input <- read.spss("[.sav file location]", to.data.frame = TRUE)
> The read.spss() seems to be applying addNA() to factors so NA is being set as a level, and there seems to be no way to get read.spss() to bring factors in without doing this. This seems to be a recent change as read.spss() was not doing this as of a few months ago. None of the arguments in read.spss() seem to also stop this behaviour. I am currently on the most recent version of both R and the package, as of 27/05/21, and am using RStudio Version 1.4.1106.
Within R (I do not use RStudio) and even with the most recent R-devel, I see
(sav <- system.file("files", "electric.sav", package = "foreign"))
dat <- read.spss(file=sav, to.data.frame=TRUE)
# SUNDAY MONDAY TUESDAY WEDNSDAY THURSDAY FRIDAY SATURDAY
# 19 11 19 17 15 13 16
# SUNDAY MONDAY TUESDAY WEDNSDAY THURSDAY FRIDAY SATURDAY <NA>
# 19 11 19 17 15 13 16 130
So exactly what you expected?
If you rather use
dat <- read.spss(file=sav, to.data.frame=TRUE, use.missings=FALSE)
you see the NA values are converted to a factor level called "MISSING".
If it is different on your end, pelase try in plain R, tell us the
version of R / foreign and show an example data file where this happens.
> Any thoughts?
> Many Thanks,
> Justin Allen
> p.s. your continued maintenance and additions to R and its packages have been infinitely useful in my work and life and thank for that.
> Justin Allen
> Housing Consultant, BRE<https://bregroup.com/>
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