If the file sizes are the same, then presumably both contain the binary data.
From the serialize function help:
"As almost all systems in current use are little-endian, xdr = FALSE can be used to
avoid byte-shuffling at both ends when transferring data from one little-endian machine
to another (or between processes on the same machine). Depending on the system, this can
speed up serialization and unserialization by a factor of up to 3x."
So you could try:
# windows (not run)
f <- file("rawData.rds", open="w")
serialize(rawData, f, xdr = FALSE)
close(f)
# linux
rawData <- unserialize(file = "rawData.rds")
HTH
On 07/11/18 08:45, Patrick Connolly wrote:
On Wed, 07-Nov-2018 at 08:27AM +0000, Robert David Burbidge wrote:
|> Hi Patrick,
|>
|> From the help: "save writes a single line header (typically
|> "RDXs\n") before the serialization of a single object".
|>
|> If the file sizes are the same (see Eric's message), then the
|> problem may be due to different line terminators. Try serialize and
|> unserialize for low-level control of saving/reading objects.
I'll have to find out what 'serialize' means.
On Windows, it's a huge table, looks like it's all hexadecimal.
On Linux, it's just the text string 'rawData' -- a lot more than line
terminators.
Have I misunderstood what the idea is? I thought I'd get an identical
object, irrespective of how different the OS stores and zips it.
|>
|> Rgds,
|>
|> Robert
|>
|>
|> On 07/11/18 08:13, Eric Berger wrote:
|> >What do you see at the OS level?
|> >i.e. on windows
|> >DIR rawData.rds
|> >on linux
|> >ls -l rawData.rds
|> >compare the file sizes on both.
|> >
|> >
|> >On Wed, Nov 7, 2018 at 9:56 AM Patrick Connolly <p_conno...@slingshot.co.nz>
|> >wrote:
|> >
|> >> From a Windows R session, I do
|> >>
|> >>>object.size(rawData)
|> >>31736 bytes # from scraping a non-reproducible web address.
|> >>>saveRDS(rawData, file = "rawData.rds")
|> >>Then copy to a Linux session
|> >>
|> >>>rawData <- readRDS(file = "rawData.rds")
|> >>>rawData
|> >>[1] "rawData"
|> >>>object.size(rawData)
|> >>112 bytes
|> >>>rawData
|> >>[1] "rawData" # only the name and something to make up 112 bytes
|> >>Have I misunderstood the syntax?
|> >>
|> >>It's an old version on Windows. I haven't used Windows R since then.
|> >>
|> >>major 3
|> >>minor 2.4
|> >>year 2016
|> >>month 03
|> >>day 16
|> >>
|> >>
|> >>I've tried R-3.5.0 and R-3.5.1 Linux versions.
|> >>
|> >>In case it's material ...
|> >>
|> >>I couldn't get the scraping to work on either of the R installations
|> >>but Windows users told me it worked for them. So I thought I'd get
|> >>the R object and use it. I could understand accessing the web address
|> >>could have different permissions for different OSes, but should that
|> >>affect the R objects?
|> >>
|> >>TIA
|> >>
|> >>-
______________________________________________
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.
