On 2018-11-12 22:49, peter dalgaard wrote:
Er, where, what, how? I can't reproduce that, at least not on 3.5.1 on
MacOS:
x <- airquality
saveRDS(x, file = "x.rds")
x <- NULL
x <- readRDS(file = "x.rds")
x
Ozone Solar.R Wind Temp Month Day
1 41 190 7.4 67 5 1
2 36 118 8.0 72 5 2
3 12 149 12.6 74 5 3
...
Looks fine to me.
It seems to work fine using the same installation to read as used for
the save.
But it's a different story if the save was done on a Windows
installation and read on a Linux installation.
## On Windows 3.4.2
x <- airquality
saveRDS(x, file = "x.rds")
saveRDS(x, file = "y.rds")
Files x.rds and y.rds are identical in size but utterly different in
content.
## On Linux 3.5.1
x <- readRDS(file = "x.rds")
Error in readRDS(file = "x.rds") : error reading from connection
x <- readRDS(file = "y.rds")
head(x)
Ozone Solar.R Wind Temp Month Day
1 41 190 7.4 67 5 1
2 36 118 8.0 72 5 2
3 12 149 12.6 74 5 3
4 18 313 11.5 62 5 4
5 NA NA 14.3 56 5 5
6 28 NA 14.9 66 5 6
It might just be the age of the Windows installation. I don't have much
use for Windows, so I haven't had much inclination to install a newer
version.
YMMV
?
-pd
On 12 Nov 2018, at 08:28 , Patrick Connolly
<p_conno...@slingshot.co.nz> wrote:
The solution was very simple. Don't use the same name for the rds
file as used for the R object, viz a vie:
saveRDS(x, file = "x.rds")
and
x <- readRDS(file = "x.rds")
will not work; however
saveRDS(x, file = "y.rds")
and
x <- readRDS(file = "y.rds")
will work.
An undocumented feature?
Thanks to all who contributed.
--
Peter Dalgaard, Professor,
Center for Statistics, Copenhagen Business School
Solbjerg Plads 3, 2000 Frederiksberg, Denmark
Phone: (+45)38153501
Office: A 4.23
Email: pd....@cbs.dk Priv: pda...@gmail.com
______________________________________________
R-help@r-project.org mailing list -- To UNSUBSCRIBE and more, see
https://stat.ethz.ch/mailman/listinfo/r-help
PLEASE do read the posting guide http://www.R-project.org/posting-guide.html
and provide commented, minimal, self-contained, reproducible code.
