thr3ads.net - R help - [R] saveRDS() and readRDS() Why? [solved, pretty much anyway) [Nov 2018]

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William Dunlap

2018-Nov-12 23:55 UTC

[R] saveRDS() and readRDS() Why? [solved, pretty much anyway)

You wrote:
  ## 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.

Wow!  Can you show us the results of
  x <- datasets::airquality
  saveRDS(x, file="x.rds")
  saveRDS(x, file="y.rds")
  tools::md5sum(c("x.rds", "y.rds"))
  dput(readBin("x.rds", what="raw",
n=file.size("x.rds")))
  dput(readBin("y.rds", what="raw",
n=file.size("y.rds")))

(Copy and paste, as text, from the R session, so we can see the input and
the output in context.





Bill Dunlap
TIBCO Software
wdunlap tibco.com

On Mon, Nov 12, 2018 at 12:42 PM, p_connolly <p_connolly at
slingshot.co.nz>
wrote:
> 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_connolly at
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.mes at cbs.dk  Priv: PDalgd at gmail.com
>>
>
> ______________________________________________
> R-help at 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/posti
> ng-guide.html
> and provide commented, minimal, self-contained, reproducible code.
>
	[[alternative HTML version deleted]]

p_connolly

2018-Nov-13 03:10 UTC

head link

[R] saveRDS() and readRDS() Why? [solved, pretty much anyway)

On 2018-11-13 12:55, William Dunlap wrote:> You wrote:
>   ## 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.
> 
>  Wow!  Can you show us the results of
>   x <- datasets::airquality
>   saveRDS(x, file="x.rds")
>   saveRDS(x, file="y.rds")
>   tools::md5sum(c("x.rds", "y.rds"))
>   dput(readBin("x.rds", what="raw",
n=file.size("x.rds")))
>   dput(readBin("y.rds", what="raw",
n=file.size("y.rds")))
> 
> (Copy and paste, as text, from the R session, so we can see the input
> and the output in context.
If I do that on Linux or Windows, I get identical files.

If I copy x.rds and y.rds from Windows to Linux (which is what I wish to 
be able to do) using a shared folder between the Windows VirtualBox host 
to the Linux guest, I  get this:

> x <- readRDS(file =  "x.rds")Error in readRDS(file = "x.rds") : error reading from
connection> x <- readRDS(file =  "y.rds")
>   tools::md5sum(c("x.rds", "y.rds"))                              x.rds                              y.rds
"5fef054848f39b4be02b7c54f1c71a20"
"978a64d1dd342d16a381c9ca728d3665">   dput(readBin("x.rds", what="raw",
n=file.size("x.rds")))as.raw(c(0x1f, 0x8b, 0x08, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
0x06, 0x03, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
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0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
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0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
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0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
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0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
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0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
0x00, 0x00))>   dput(readBin("y.rds", what="raw",
n=file.size("y.rds")))as.raw(c(0x1f, 0x8b, 0x08, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
0x06, 0xe5, 0x97, 0x4b, 0x6c, 0x54, 0x55, 0x18, 0xc7, 0xcf, 0x9d,
0x0e, 0x7d, 0x41, 0x71, 0x2c, 0x15, 0xac, 0x65, 0xa0, 0x94, 0xa9,
0x80, 0x94, 0x52, 0xa1, 0x0b, 0xa9, 0x01, 0xa6, 0x58, 0xc4, 0xda,
0x76, 0x68, 0x99, 0x42, 0x0b, 0x2d, 0xe8, 0x08, 0x45, 0x4d, 0xca,
0x94, 0xb4, 0xc4, 0x07, 0x1b, 0x49, 0x5c, 0x10, 0x75, 0x65, 0xa2,
0x26, 0x35, 0x71, 0xad, 0x3b, 0x16, 0x2e, 0x4c, 0x7c, 0x6b, 0xc2,
0x82, 0xa8, 0x71, 0xa3, 0x71, 0x63, 0x7c, 0x2c, 0x74, 0x85, 0x2c,
0x8c, 0x0b, 0xa3, 0x40, 0xfd, 0x7f, 0xf7, 0xfc, 0xff, 0xed, 0xcd,
0x49, 0x59, 0xcf, 0xc2, 0x9b, 0xfc, 0xe6, 0xbb, 0xe7, 0x3b, 0xe7,
0x7c, 0xaf, 0x73, 0xee, 0xdc, 0x73, 0xc7, 0xeb, 0x9d, 0x73, 0x29,
0x57, 0x95, 0x4a, 0xbb, 0x54, 0x15, 0x6e, 0xab, 0xd6, 0xe0, 0xa7,
0x1a, 0x34, 0x80, 0x79, 0xb0, 0x0d, 0xe4, 0xc0, 0x2a, 0xd0, 0x78,
0xc9, 0xc5, 0xd7, 0x7a, 0xb0, 0x0e, 0xd8, 0xd8, 0x5a, 0xea, 0x6a,
0x40, 0x06, 0xac, 0x04, 0xab, 0x6d, 0x2c, 0x65, 0x1b, 0xed, 0x6d,
0x60, 0x5f, 0x44, 0x99, 0x06, 0xad, 0x36, 0x57, 0xd0, 0xe6, 0x0e,
0x30, 0x07, 0xda, 0x93, 0x7d, 0xc1, 0xb8, 0x2c, 0xe5, 0x21, 0xb0,
0x25, 0x39, 0x3f, 0x71, 0x7f, 0x8f, 0xd9, 0x00, 0x4d, 0x8c, 0xbd,
0xe1, 0x4e, 0xf6, 0x96, 0xb1, 0x7f, 0x19, 0x3c, 0xa8, 0xf8, 0x70,
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0x60, 0x02, 0xec, 0xb4, 0x1a, 0x30, 0xd6, 0x75, 0xb4, 0x75, 0x6f,
0xc2, 0xee, 0x7a, 0xc6, 0x6a, 0x7b, 0xa5, 0xd3, 0xf9, 0x35, 0x6f,
0xe0, 0x98, 0x0c, 0xef, 0x6d, 0x5e, 0x8e, 0xb5, 0xb1, 0xfd, 0xb0,
0x81, 0xbe, 0xb5, 0x47, 0x9a, 0xdc, 0xd2, 0x5e, 0xfb, 0x94, 0xf1,
0xbc, 0x89, 0x6d, 0xb2, 0x67, 0x29, 0xcf, 0x68, 0x3b, 0x7e, 0x4e,
0x3b, 0xbf, 0xdf, 0xbe, 0xa4, 0xce, 0xc0, 0xde, 0x8a, 0xcc, 0x46,
0x2f, 0x24, 0xe2, 0x8e, 0x76, 0xfb, 0xf8, 0xa3, 0x03, 0x8c, 0xb1,
0x16, 0xf7, 0x56, 0xd7, 0x66, 0x30, 0xe9, 0xeb, 0x18, 0xd5, 0xd3,
0xbf, 0xf9, 0xbc, 0x09, 0x7e, 0x86, 0x0e, 0x31, 0x46, 0xd8, 0x9f,
0x91, 0xd5, 0xec, 0x4f, 0xf0, 0x21, 0xf8, 0x11, 0x6d, 0xcc, 0x77,
0x2f, 0x41, 0xde, 0x0d, 0xb0, 0x0e, 0xd1, 0x23, 0xc0, 0x1e, 0x92,
0x7f, 0xc0, 0x1b, 0xb8, 0x1f, 0xa4, 0xaf, 0xcf, 0x20, 0xad, 0x16,
0xb6, 0xdf, 0x5e, 0x00, 0xaf, 0x80, 0xb7, 0xb8, 0x16, 0x13, 0x1c,
0x7f, 0xd9, 0xdb, 0x8a, 0x6b, 0xfa, 0x14, 0xd7, 0xe7, 0x55, 0xcc,
0xb3, 0x38, 0xfe, 0x06, 0xd7, 0xc1, 0x14, 0xb8, 0x02, 0x5d, 0x0f,
0x40, 0x5d, 0x22, 0x3c, 0x27, 0x51, 0xc6, 0xeb, 0xdc, 0x6b, 0x8c,
0xe7, 0x8a, 0x8f, 0xc5, 0xf6, 0x59, 0x94, 0xf6, 0xf9, 0x47, 0x59,
0xb4, 0x3f, 0xf2, 0x31, 0x5b, 0x9d, 0xa3, 0x14, 0xc0, 0x3e, 0x8a,
0xee, 0xf7, 0xf9, 0xb9, 0x11, 0xe7, 0xf7, 0xd9, 0xf7, 0xd0, 0x59,
0x0d, 0x6f, 0x81, 0xdb, 0xa0, 0xc8, 0xb5, 0x1a, 0x52, 0xad, 0x59,
0x9b, 0x05, 0xf0, 0x1b, 0xf8, 0x16, 0xfc, 0xc4, 0x7c, 0x3e, 0xf7,
0x75, 0x70, 0xef, 0x38, 0xbf, 0x57, 0xed, 0xd9, 0xb3, 0x7a, 0xdb,
0xb3, 0xfa, 0x97, 0x5f, 0xbb, 0xb8, 0x36, 0x39, 0xce, 0xff, 0x0e,
0xdc, 0x00, 0x3f, 0x70, 0x6d, 0xbf, 0x02, 0xbf, 0x82, 0x3f, 0xc0,
0xc7, 0xe0, 0x5d, 0x70, 0x15, 0x7c, 0x00, 0x3e, 0x01, 0x4f, 0x70,
0x8d, 0x6e, 0x32, 0x8f, 0xdf, 0x69, 0xef, 0x3a, 0xe5, 0x0d, 0xc6,
0x7a, 0x9e, 0x36, 0x7e, 0x01, 0x2d, 0xd4, 0x5f, 0xa3, 0x5c, 0xed,
0xeb, 0x14, 0x3f, 0xbb, 0xb6, 0xaf, 0xbe, 0x00, 0xaf, 0xfb, 0xf5,
0x71, 0x2f, 0xb3, 0x16, 0x36, 0x66, 0x3e, 0x9f, 0x9d, 0xb7, 0xeb,
0xed, 0x7c, 0xab, 0x4f, 0x38, 0xbf, 0x6d, 0x77, 0x7c, 0xe5, 0xb7,
0xb0, 0xdd, 0xc1, 0xfe, 0x1d, 0x5f, 0xdb, 0xf5, 0x4d, 0x7e, 0x13,
0xfb, 0xb7, 0x53, 0xdf, 0xdd, 0xec, 0xa5, 0xf4, 0x2d, 0xd4, 0x6f,
0x3e, 0x1b, 0x5f, 0xf9, 0x36, 0xca, 0x76, 0xce, 0x7f, 0x80, 0x6d,
0xd9, 0xdf, 0x4a, 0xb9, 0x2b, 0xd0, 0x6b, 0xbe, 0x64, 0x57, 0x60,
0x57, 0xf3, 0xba, 0x82, 0xf8, 0x5a, 0x03, 0xbb, 0xd2, 0xaf, 0xa5,
0x54, 0xbe, 0x8a, 0x77, 0xd1, 0x3e, 0xf3, 0x50, 0xbc, 0xea, 0xef,
0x08, 0xfc, 0x2a, 0x3f, 0xe5, 0xaf, 0x78, 0x95, 0x9f, 0xe6, 0x2b,
0x8e, 0x70, 0x9c, 0xe2, 0xe9, 0x7e, 0xdf, 0xdb, 0x6f, 0x0b, 0xf2,
0xce, 0x71, 0x7c, 0xb3, 0xf7, 0xbf, 0xff, 0x5f, 0xc6, 0xd1, 0xc8,
0x71, 0xd4, 0x2f, 0xda, 0x6f, 0x0d, 0xe6, 0x85, 0x7e, 0xd4, 0x9f,
0x09, 0xd6, 0x23, 0x5c, 0x97, 0xc6, 0xa0, 0xdd, 0x14, 0xf8, 0xbb,
0x53, 0xfd, 0xc2, 0xfd, 0x21, 0x29, 0xbd, 0xea, 0x15, 0xe4, 0xb5,
0x68, 0x5f, 0xf1, 0x86, 0xfb, 0x46, 0xfa, 0x4d, 0x41, 0xbe, 0x6a,
0x6b, 0x7d, 0x15, 0x4f, 0x28, 0x95, 0x5f, 0xb8, 0x5e, 0xd9, 0x20,
0x2e, 0xb5, 0x95, 0x7f, 0x26, 0xa8, 0x67, 0xe8, 0x57, 0x71, 0x85,
0x32, 0x8c, 0x3b, 0xcc, 0x57, 0x7e, 0x54, 0x5f, 0xf5, 0xef, 0x0c,
0x9e, 0x33, 0x3d, 0x7f, 0xb2, 0xb7, 0x32, 0xc8, 0x5f, 0xeb, 0xa0,
0xfe, 0x54, 0xb0, 0x4e, 0x92, 0xca, 0x4f, 0x75, 0xae, 0xa6, 0x54,
0x9e, 0xd9, 0xc0, 0x7f, 0x18, 0x57, 0x7b, 0xe0, 0x47, 0xeb, 0xaa,
0xf1, 0xf2, 0xa3, 0x71, 0xe1, 0x3a, 0xaa, 0xde, 0xb9, 0x40, 0x2a,
0x0f, 0xe5, 0xa9, 0x75, 0x0a, 0xc7, 0xe9, 0xb9, 0x96, 0x3d, 0xfd,
0x6f, 0x74, 0x04, 0x76, 0xe8, 0xd7, 0x2d, 0xbd, 0x3b, 0xf1, 0x6e,
0x72, 0x8f, 0x81, 0xc7, 0xc1, 0x3e, 0xf0, 0x90, 0xf3, 0xe7, 0x06,
0xbc, 0x1b, 0xe3, 0xf7, 0x90, 0x9d, 0x47, 0x0e, 0xb2, 0xff, 0x20,
0xfb, 0xfa, 0x40, 0x8f, 0xf3, 0xff, 0xe7, 0xd6, 0xde, 0x43, 0xdd,
0x3e, 0xce, 0xe9, 0xe7, 0xbc, 0xbd, 0xec, 0xeb, 0xa1, 0x34, 0x5f,
0xf6, 0x4e, 0xb1, 0xf3, 0x8d, 0x9d, 0x21, 0x0a, 0xb4, 0x6b, 0x7a,
0x9d, 0x25, 0xac, 0xcf, 0xde, 0x39, 0x63, 0xe0, 0x04, 0xe5, 0x49,
0xe7, 0xff, 0xe3, 0x4d, 0x3f, 0xcc, 0x31, 0x43, 0x8c, 0xbb, 0x97,
0xfe, 0x06, 0xa9, 0x1b, 0x4c, 0x30, 0xe0, 0x96, 0xce, 0x25, 0xc3,
0xec, 0x2f, 0x26, 0x7c, 0x8d, 0xf0, 0xbe, 0x48, 0xc6, 0xe9, 0xc7,
0x38, 0x4e, 0x7f, 0xfd, 0x1c, 0x37, 0x41, 0x1b, 0x7a, 0x27, 0x8e,
0x32, 0xb6, 0xa3, 0xcc, 0x41, 0xfa, 0x63, 0xd4, 0xe9, 0x7e, 0x9c,
0xb2, 0xc8, 0x31, 0x23, 0xcb, 0x8c, 0x1d, 0xa3, 0xbf, 0x13, 0x64,
0x92, 0x7d, 0xc7, 0x96, 0xc9, 0x39, 0x59, 0xbb, 0x42, 0xa2, 0x0e,
0x03, 0xec, 0x1b, 0x49, 0xf8, 0xb5, 0xf3, 0xe6, 0x29, 0xe7, 0xcf,
0x67, 0xa7, 0x98, 0xc3, 0x24, 0xeb, 0x79, 0x92, 0x7e, 0x47, 0x69,
0xbf, 0x40, 0x1b, 0xca, 0x57, 0xf5, 0x3c, 0x44, 0x0a, 0x5c, 0x27,
0xd3, 0xf7, 0x31, 0xae, 0x3c, 0xfb, 0x6c, 0xbc, 0xed, 0x0d, 0x3b,
0xb3, 0x3e, 0xca, 0x79, 0x03, 0x89, 0xb1, 0xda, 0x6b, 0x2b, 0x2a,
0x48, 0x75, 0x85, 0xa8, 0xa9, 0x20, 0xb5, 0x15, 0xa4, 0xae, 0x42,
0x68, 0xaf, 0xd9, 0x41, 0x1f, 0xe7, 0x59, 0x67, 0x67, 0x40, 0xfb,
0x66, 0xd4, 0x1e, 0x50, 0x5d, 0x6c, 0xac, 0x7d, 0x83, 0xd9, 0x37,
0xe5, 0x2a, 0xce, 0xb3, 0x33, 0xde, 0x5d, 0xce, 0x7f, 0x83, 0xd8,
0x99, 0xd5, 0xbe, 0x11, 0xec, 0xdc, 0x6b, 0x67, 0x42, 0xfb, 0x6e,
0xb1, 0xef, 0x24, 0xfb, 0x2e, 0xb1, 0xf3, 0xa4, 0x7d, 0x1b, 0xdc,
0xe7, 0xfc, 0x59, 0xd2, 0xce, 0xf0, 0x76, 0x96, 0xb6, 0x6f, 0xd5,
0x8d, 0x15, 0xf4, 0xfd, 0x7f, 0xcc, 0xb9, 0x82, 0xbe, 0xd3, 0xa9,
0xd8, 0x77, 0x3a, 0xb6, 0xbf, 0xa2, 0x5c, 0x3a, 0x37, 0x35, 0x47,
0x83, 0xd5, 0x52, 0x1e, 0xbe, 0x38, 0x53, 0x9e, 0x62, 0xa3, 0xa6,
0x38, 0x33, 0x5d, 0x9a, 0xed, 0x3c, 0xc2, 0x66, 0x7a, 0xec, 0xd9,
0xf2, 0x19, 0xdd, 0x8f, 0x4e, 0x9d, 0x3b, 0xaf, 0x39, 0x43, 0x33,
0xe5, 0x0b, 0xcf, 0xb0, 0x51, 0xd5, 0x57, 0x7a, 0x31, 0x74, 0x74,
0x7a, 0xba, 0x34, 0x27, 0x47, 0x52, 0xd6, 0x9f, 0x29, 0x5d, 0x28,
0x75, 0x9e, 0x9d, 0x45, 0x0c, 0xc1, 0xf0, 0xba, 0xd9, 0x99, 0xe7,
0x3b, 0x15, 0x9b, 0x25, 0x9e, 0xba, 0x84, 0x9f, 0x85, 0x85, 0x85,
0xa7, 0x21, 0x6e, 0xff, 0x07, 0x03, 0xf3, 0xcf, 0x7e, 0xc7, 0x11,
0x00, 0x00))> 
The issue is evidently with the shared folder. I've been doing that 
(sharing the folder) for years and never encountered a problem.

> 
> Bill Dunlap
> TIBCO Software
> wdunlap tibco.com [1]
> On Mon, Nov 12, 2018 at 12:42 PM, p_connolly
> <p_connolly at slingshot.co.nz> wrote:
> 
>> 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_connolly at 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.mes at cbs.dk  Priv: PDalgd at gmail.com
> 
> ______________________________________________
> R-help at r-project.org mailing list -- To UNSUBSCRIBE and more, see
> https://stat.ethz.ch/mailman/listinfo/r-help [2]
> PLEASE do read the posting guide
> http://www.R-project.org/posting-guide.html [3]
> and provide commented, minimal, self-contained, reproducible code.
> 
> 
> 
> Links:
> ------
> [1] http://tibco.com
> [2] https://stat.ethz.ch/mailman/listinfo/r-help
> [3] http://www.R-project.org/posting-guide.html

William Dunlap

2018-Nov-13 17:26 UTC

head link

[R] saveRDS() and readRDS() Why? [solved, pretty much anyway)

It seems like copying the files corrupted them. How did you copy them (with
R
or cp or copy or ftp, etc.)?  I don't see how this has anything to do with
R.

Bill Dunlap
TIBCO Software
wdunlap tibco.com

On Mon, Nov 12, 2018 at 7:10 PM, p_connolly <p_connolly at
slingshot.co.nz>
wrote:
> On 2018-11-13 12:55, William Dunlap wrote:
>
>> You wrote:
>>   ## 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.
>>
>>  Wow!  Can you show us the results of
>>   x <- datasets::airquality
>>   saveRDS(x, file="x.rds")
>>   saveRDS(x, file="y.rds")
>>   tools::md5sum(c("x.rds", "y.rds"))
>>   dput(readBin("x.rds", what="raw",
n=file.size("x.rds")))
>>   dput(readBin("y.rds", what="raw",
n=file.size("y.rds")))
>>
>> (Copy and paste, as text, from the R session, so we can see the input
>> and the output in context.
>>
>
> If I do that on Linux or Windows, I get identical files.
>
> If I copy x.rds and y.rds from Windows to Linux (which is what I wish to
> be able to do) using a shared folder between the Windows VirtualBox host to
> the Linux guest, I  get this:
>
>
> x <- readRDS(file =  "x.rds")
>>
> Error in readRDS(file = "x.rds") : error reading from connection
>
>> x <- readRDS(file =  "y.rds")
>>   tools::md5sum(c("x.rds", "y.rds"))
>>
>                              x.rds                              y.rds
> "5fef054848f39b4be02b7c54f1c71a20"
"978a64d1dd342d16a381c9ca728d3665"
>
>>   dput(readBin("x.rds", what="raw",
n=file.size("x.rds")))
>>
> as.raw(c(0x1f, 0x8b, 0x08, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
> 0x06, 0x03, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
> 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
> 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
> 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
> 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
> 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
> 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
> 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
> 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
> 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
> 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
> 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
> 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
> 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
> 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
> 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
> 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
> 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
> 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
> 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
> 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
> 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
> 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
> 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
> 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
> 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
> 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
> 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
> 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
> 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
> 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
> 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
> 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
> 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
> 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
> 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
> 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
> 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
> 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
> 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
> 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
> 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
> 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
> 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
> 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
> 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
> 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
> 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
> 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
> 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
> 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
> 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
> 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
> 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
> 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
> 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
> 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
> 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
> 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
> 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
> 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
> 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
> 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
> 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
> 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
> 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
> 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
> 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
> 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
> 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
> 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
> 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
> 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
> 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
> 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
> 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
> 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
> 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
> 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
> 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
> 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
> 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
> 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
> 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
> 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
> 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
> 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
> 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
> 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
> 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
> 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
> 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
> 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
> 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
> 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
> 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
> 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
> 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
> 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
> 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
> 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
> 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
> 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
> 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
> 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
> 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
> 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
> 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
> 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
> 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
> 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
> 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
> 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
> 0x00, 0x00))
>
>>   dput(readBin("y.rds", what="raw",
n=file.size("y.rds")))
>>
> as.raw(c(0x1f, 0x8b, 0x08, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
> 0x06, 0xe5, 0x97, 0x4b, 0x6c, 0x54, 0x55, 0x18, 0xc7, 0xcf, 0x9d,
> 0x0e, 0x7d, 0x41, 0x71, 0x2c, 0x15, 0xac, 0x65, 0xa0, 0x94, 0xa9,
> 0x80, 0x94, 0x52, 0xa1, 0x0b, 0xa9, 0x01, 0xa6, 0x58, 0xc4, 0xda,
> 0x76, 0x68, 0x99, 0x42, 0x0b, 0x2d, 0xe8, 0x08, 0x45, 0x4d, 0xca,
> 0x94, 0xb4, 0xc4, 0x07, 0x1b, 0x49, 0x5c, 0x10, 0x75, 0x65, 0xa2,
> 0x26, 0x35, 0x71, 0xad, 0x3b, 0x16, 0x2e, 0x4c, 0x7c, 0x6b, 0xc2,
> 0x82, 0xa8, 0x71, 0xa3, 0x71, 0x63, 0x7c, 0x2c, 0x74, 0x85, 0x2c,
> 0x8c, 0x0b, 0xa3, 0x40, 0xfd, 0x7f, 0xf7, 0xfc, 0xff, 0xed, 0xcd,
> 0x49, 0x59, 0xcf, 0xc2, 0x9b, 0xfc, 0xe6, 0xbb, 0xe7, 0x3b, 0xe7,
> 0x7c, 0xaf, 0x73, 0xee, 0xdc, 0x73, 0xc7, 0xeb, 0x9d, 0x73, 0x29,
> 0x57, 0x95, 0x4a, 0xbb, 0x54, 0x15, 0x6e, 0xab, 0xd6, 0xe0, 0xa7,
> 0x1a, 0x34, 0x80, 0x79, 0xb0, 0x0d, 0xe4, 0xc0, 0x2a, 0xd0, 0x78,
> 0xc9, 0xc5, 0xd7, 0x7a, 0xb0, 0x0e, 0xd8, 0xd8, 0x5a, 0xea, 0x6a,
> 0x40, 0x06, 0xac, 0x04, 0xab, 0x6d, 0x2c, 0x65, 0x1b, 0xed, 0x6d,
> 0x60, 0x5f, 0x44, 0x99, 0x06, 0xad, 0x36, 0x57, 0xd0, 0xe6, 0x0e,
> 0x30, 0x07, 0xda, 0x93, 0x7d, 0xc1, 0xb8, 0x2c, 0xe5, 0x21, 0xb0,
> 0x25, 0x39, 0x3f, 0x71, 0x7f, 0x8f, 0xd9, 0x00, 0x4d, 0x8c, 0xbd,
> 0xe1, 0x4e, 0xf6, 0x96, 0xb1, 0x7f, 0x19, 0x3c, 0xa8, 0xf8, 0x70,
> 0xe5, 0xc1, 0x56, 0x30, 0x04, 0x4a, 0xe4, 0x28, 0xfb, 0xac, 0x7e,
> 0x2d, 0x89, 0x1a, 0x74, 0x81, 0xcd, 0x60, 0x2f, 0x38, 0x0c, 0xf6,
> 0x5b, 0x5d, 0x12, 0xb6, 0x87, 0xc1, 0x34, 0xe3, 0xea, 0x06, 0x47,
> 0xc0, 0x2e, 0xfa, 0x78, 0xd8, 0xf2, 0x01, 0x75, 0xce, 0xd7, 0xb2,
> 0x40, 0x5b, 0x07, 0xc0, 0x45, 0x70, 0x1c, 0x94, 0x13, 0xb6, 0x3a,
> 0x9c, 0x5f, 0x8b, 0x5e, 0xb6, 0xd7, 0xd2, 0x86, 0xd5, 0x71, 0x23,
> 0xfb, 0xad, 0x0e, 0x75, 0xec, 0xb7, 0xda, 0xbe, 0x07, 0xfa, 0xd9,
> 0x1e, 0x04, 0xcf, 0x81, 0x51, 0xcb, 0x07, 0x3c, 0x49, 0x9f, 0xfd,
> 0x60, 0x02, 0xec, 0xb4, 0x1a, 0x30, 0xd6, 0x75, 0xb4, 0x75, 0x6f,
> 0xc2, 0xee, 0x7a, 0xc6, 0x6a, 0x7b, 0xa5, 0xd3, 0xf9, 0x35, 0x6f,
> 0xe0, 0x98, 0x0c, 0xef, 0x6d, 0x5e, 0x8e, 0xb5, 0xb1, 0xfd, 0xb0,
> 0x81, 0xbe, 0xb5, 0x47, 0x9a, 0xdc, 0xd2, 0x5e, 0xfb, 0x94, 0xf1,
> 0xbc, 0x89, 0x6d, 0xb2, 0x67, 0x29, 0xcf, 0x68, 0x3b, 0x7e, 0x4e,
> 0x3b, 0xbf, 0xdf, 0xbe, 0xa4, 0xce, 0xc0, 0xde, 0x8a, 0xcc, 0x46,
> 0x2f, 0x24, 0xe2, 0x8e, 0x76, 0xfb, 0xf8, 0xa3, 0x03, 0x8c, 0xb1,
> 0x16, 0xf7, 0x56, 0xd7, 0x66, 0x30, 0xe9, 0xeb, 0x18, 0xd5, 0xd3,
> 0xbf, 0xf9, 0xbc, 0x09, 0x7e, 0x86, 0x0e, 0x31, 0x46, 0xd8, 0x9f,
> 0x91, 0xd5, 0xec, 0x4f, 0xf0, 0x21, 0xf8, 0x11, 0x6d, 0xcc, 0x77,
> 0x2f, 0x41, 0xde, 0x0d, 0xb0, 0x0e, 0xd1, 0x23, 0xc0, 0x1e, 0x92,
> 0x7f, 0xc0, 0x1b, 0xb8, 0x1f, 0xa4, 0xaf, 0xcf, 0x20, 0xad, 0x16,
> 0xb6, 0xdf, 0x5e, 0x00, 0xaf, 0x80, 0xb7, 0xb8, 0x16, 0x13, 0x1c,
> 0x7f, 0xd9, 0xdb, 0x8a, 0x6b, 0xfa, 0x14, 0xd7, 0xe7, 0x55, 0xcc,
> 0xb3, 0x38, 0xfe, 0x06, 0xd7, 0xc1, 0x14, 0xb8, 0x02, 0x5d, 0x0f,
> 0x40, 0x5d, 0x22, 0x3c, 0x27, 0x51, 0xc6, 0xeb, 0xdc, 0x6b, 0x8c,
> 0xe7, 0x8a, 0x8f, 0xc5, 0xf6, 0x59, 0x94, 0xf6, 0xf9, 0x47, 0x59,
> 0xb4, 0x3f, 0xf2, 0x31, 0x5b, 0x9d, 0xa3, 0x14, 0xc0, 0x3e, 0x8a,
> 0xee, 0xf7, 0xf9, 0xb9, 0x11, 0xe7, 0xf7, 0xd9, 0xf7, 0xd0, 0x59,
> 0x0d, 0x6f, 0x81, 0xdb, 0xa0, 0xc8, 0xb5, 0x1a, 0x52, 0xad, 0x59,
> 0x9b, 0x05, 0xf0, 0x1b, 0xf8, 0x16, 0xfc, 0xc4, 0x7c, 0x3e, 0xf7,
> 0x75, 0x70, 0xef, 0x38, 0xbf, 0x57, 0xed, 0xd9, 0xb3, 0x7a, 0xdb,
> 0xb3, 0xfa, 0x97, 0x5f, 0xbb, 0xb8, 0x36, 0x39, 0xce, 0xff, 0x0e,
> 0xdc, 0x00, 0x3f, 0x70, 0x6d, 0xbf, 0x02, 0xbf, 0x82, 0x3f, 0xc0,
> 0xc7, 0xe0, 0x5d, 0x70, 0x15, 0x7c, 0x00, 0x3e, 0x01, 0x4f, 0x70,
> 0x8d, 0x6e, 0x32, 0x8f, 0xdf, 0x69, 0xef, 0x3a, 0xe5, 0x0d, 0xc6,
> 0x7a, 0x9e, 0x36, 0x7e, 0x01, 0x2d, 0xd4, 0x5f, 0xa3, 0x5c, 0xed,
> 0xeb, 0x14, 0x3f, 0xbb, 0xb6, 0xaf, 0xbe, 0x00, 0xaf, 0xfb, 0xf5,
> 0x71, 0x2f, 0xb3, 0x16, 0x36, 0x66, 0x3e, 0x9f, 0x9d, 0xb7, 0xeb,
> 0xed, 0x7c, 0xab, 0x4f, 0x38, 0xbf, 0x6d, 0x77, 0x7c, 0xe5, 0xb7,
> 0xb0, 0xdd, 0xc1, 0xfe, 0x1d, 0x5f, 0xdb, 0xf5, 0x4d, 0x7e, 0x13,
> 0xfb, 0xb7, 0x53, 0xdf, 0xdd, 0xec, 0xa5, 0xf4, 0x2d, 0xd4, 0x6f,
> 0x3e, 0x1b, 0x5f, 0xf9, 0x36, 0xca, 0x76, 0xce, 0x7f, 0x80, 0x6d,
> 0xd9, 0xdf, 0x4a, 0xb9, 0x2b, 0xd0, 0x6b, 0xbe, 0x64, 0x57, 0x60,
> 0x57, 0xf3, 0xba, 0x82, 0xf8, 0x5a, 0x03, 0xbb, 0xd2, 0xaf, 0xa5,
> 0x54, 0xbe, 0x8a, 0x77, 0xd1, 0x3e, 0xf3, 0x50, 0xbc, 0xea, 0xef,
> 0x08, 0xfc, 0x2a, 0x3f, 0xe5, 0xaf, 0x78, 0x95, 0x9f, 0xe6, 0x2b,
> 0x8e, 0x70, 0x9c, 0xe2, 0xe9, 0x7e, 0xdf, 0xdb, 0x6f, 0x0b, 0xf2,
> 0xce, 0x71, 0x7c, 0xb3, 0xf7, 0xbf, 0xff, 0x5f, 0xc6, 0xd1, 0xc8,
> 0x71, 0xd4, 0x2f, 0xda, 0x6f, 0x0d, 0xe6, 0x85, 0x7e, 0xd4, 0x9f,
> 0x09, 0xd6, 0x23, 0x5c, 0x97, 0xc6, 0xa0, 0xdd, 0x14, 0xf8, 0xbb,
> 0x53, 0xfd, 0xc2, 0xfd, 0x21, 0x29, 0xbd, 0xea, 0x15, 0xe4, 0xb5,
> 0x68, 0x5f, 0xf1, 0x86, 0xfb, 0x46, 0xfa, 0x4d, 0x41, 0xbe, 0x6a,
> 0x6b, 0x7d, 0x15, 0x4f, 0x28, 0x95, 0x5f, 0xb8, 0x5e, 0xd9, 0x20,
> 0x2e, 0xb5, 0x95, 0x7f, 0x26, 0xa8, 0x67, 0xe8, 0x57, 0x71, 0x85,
> 0x32, 0x8c, 0x3b, 0xcc, 0x57, 0x7e, 0x54, 0x5f, 0xf5, 0xef, 0x0c,
> 0x9e, 0x33, 0x3d, 0x7f, 0xb2, 0xb7, 0x32, 0xc8, 0x5f, 0xeb, 0xa0,
> 0xfe, 0x54, 0xb0, 0x4e, 0x92, 0xca, 0x4f, 0x75, 0xae, 0xa6, 0x54,
> 0x9e, 0xd9, 0xc0, 0x7f, 0x18, 0x57, 0x7b, 0xe0, 0x47, 0xeb, 0xaa,
> 0xf1, 0xf2, 0xa3, 0x71, 0xe1, 0x3a, 0xaa, 0xde, 0xb9, 0x40, 0x2a,
> 0x0f, 0xe5, 0xa9, 0x75, 0x0a, 0xc7, 0xe9, 0xb9, 0x96, 0x3d, 0xfd,
> 0x6f, 0x74, 0x04, 0x76, 0xe8, 0xd7, 0x2d, 0xbd, 0x3b, 0xf1, 0x6e,
> 0x72, 0x8f, 0x81, 0xc7, 0xc1, 0x3e, 0xf0, 0x90, 0xf3, 0xe7, 0x06,
> 0xbc, 0x1b, 0xe3, 0xf7, 0x90, 0x9d, 0x47, 0x0e, 0xb2, 0xff, 0x20,
> 0xfb, 0xfa, 0x40, 0x8f, 0xf3, 0xff, 0xe7, 0xd6, 0xde, 0x43, 0xdd,
> 0x3e, 0xce, 0xe9, 0xe7, 0xbc, 0xbd, 0xec, 0xeb, 0xa1, 0x34, 0x5f,
> 0xf6, 0x4e, 0xb1, 0xf3, 0x8d, 0x9d, 0x21, 0x0a, 0xb4, 0x6b, 0x7a,
> 0x9d, 0x25, 0xac, 0xcf, 0xde, 0x39, 0x63, 0xe0, 0x04, 0xe5, 0x49,
> 0xe7, 0xff, 0xe3, 0x4d, 0x3f, 0xcc, 0x31, 0x43, 0x8c, 0xbb, 0x97,
> 0xfe, 0x06, 0xa9, 0x1b, 0x4c, 0x30, 0xe0, 0x96, 0xce, 0x25, 0xc3,
> 0xec, 0x2f, 0x26, 0x7c, 0x8d, 0xf0, 0xbe, 0x48, 0xc6, 0xe9, 0xc7,
> 0x38, 0x4e, 0x7f, 0xfd, 0x1c, 0x37, 0x41, 0x1b, 0x7a, 0x27, 0x8e,
> 0x32, 0xb6, 0xa3, 0xcc, 0x41, 0xfa, 0x63, 0xd4, 0xe9, 0x7e, 0x9c,
> 0xb2, 0xc8, 0x31, 0x23, 0xcb, 0x8c, 0x1d, 0xa3, 0xbf, 0x13, 0x64,
> 0x92, 0x7d, 0xc7, 0x96, 0xc9, 0x39, 0x59, 0xbb, 0x42, 0xa2, 0x0e,
> 0x03, 0xec, 0x1b, 0x49, 0xf8, 0xb5, 0xf3, 0xe6, 0x29, 0xe7, 0xcf,
> 0x67, 0xa7, 0x98, 0xc3, 0x24, 0xeb, 0x79, 0x92, 0x7e, 0x47, 0x69,
> 0xbf, 0x40, 0x1b, 0xca, 0x57, 0xf5, 0x3c, 0x44, 0x0a, 0x5c, 0x27,
> 0xd3, 0xf7, 0x31, 0xae, 0x3c, 0xfb, 0x6c, 0xbc, 0xed, 0x0d, 0x3b,
> 0xb3, 0x3e, 0xca, 0x79, 0x03, 0x89, 0xb1, 0xda, 0x6b, 0x2b, 0x2a,
> 0x48, 0x75, 0x85, 0xa8, 0xa9, 0x20, 0xb5, 0x15, 0xa4, 0xae, 0x42,
> 0x68, 0xaf, 0xd9, 0x41, 0x1f, 0xe7, 0x59, 0x67, 0x67, 0x40, 0xfb,
> 0x66, 0xd4, 0x1e, 0x50, 0x5d, 0x6c, 0xac, 0x7d, 0x83, 0xd9, 0x37,
> 0xe5, 0x2a, 0xce, 0xb3, 0x33, 0xde, 0x5d, 0xce, 0x7f, 0x83, 0xd8,
> 0x99, 0xd5, 0xbe, 0x11, 0xec, 0xdc, 0x6b, 0x67, 0x42, 0xfb, 0x6e,
> 0xb1, 0xef, 0x24, 0xfb, 0x2e, 0xb1, 0xf3, 0xa4, 0x7d, 0x1b, 0xdc,
> 0xe7, 0xfc, 0x59, 0xd2, 0xce, 0xf0, 0x76, 0x96, 0xb6, 0x6f, 0xd5,
> 0x8d, 0x15, 0xf4, 0xfd, 0x7f, 0xcc, 0xb9, 0x82, 0xbe, 0xd3, 0xa9,
> 0xd8, 0x77, 0x3a, 0xb6, 0xbf, 0xa2, 0x5c, 0x3a, 0x37, 0x35, 0x47,
> 0x83, 0xd5, 0x52, 0x1e, 0xbe, 0x38, 0x53, 0x9e, 0x62, 0xa3, 0xa6,
> 0x38, 0x33, 0x5d, 0x9a, 0xed, 0x3c, 0xc2, 0x66, 0x7a, 0xec, 0xd9,
> 0xf2, 0x19, 0xdd, 0x8f, 0x4e, 0x9d, 0x3b, 0xaf, 0x39, 0x43, 0x33,
> 0xe5, 0x0b, 0xcf, 0xb0, 0x51, 0xd5, 0x57, 0x7a, 0x31, 0x74, 0x74,
> 0x7a, 0xba, 0x34, 0x27, 0x47, 0x52, 0xd6, 0x9f, 0x29, 0x5d, 0x28,
> 0x75, 0x9e, 0x9d, 0x45, 0x0c, 0xc1, 0xf0, 0xba, 0xd9, 0x99, 0xe7,
> 0x3b, 0x15, 0x9b, 0x25, 0x9e, 0xba, 0x84, 0x9f, 0x85, 0x85, 0x85,
> 0xa7, 0x21, 0x6e, 0xff, 0x07, 0x03, 0xf3, 0xcf, 0x7e, 0xc7, 0x11,
> 0x00, 0x00))
>
>>
>>
> The issue is evidently with the shared folder. I've been doing that
> (sharing the folder) for years and never encountered a problem.
>
>
>
>> Bill Dunlap
>> TIBCO Software
>> wdunlap tibco.com [1]
>>
>> On Mon, Nov 12, 2018 at 12:42 PM, p_connolly
>> <p_connolly at slingshot.co.nz> wrote:
>>
>> 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_connolly at 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.mes at cbs.dk  Priv: PDalgd at gmail.com
>>>
>>
>> ______________________________________________
>> R-help at r-project.org mailing list -- To UNSUBSCRIBE and more, see
>> https://stat.ethz.ch/mailman/listinfo/r-help [2]
>> PLEASE do read the posting guide
>> http://www.R-project.org/posting-guide.html [3]
>> and provide commented, minimal, self-contained, reproducible code.
>>
>>
>>
>> Links:
>> ------
>> [1] http://tibco.com
>> [2] https://stat.ethz.ch/mailman/listinfo/r-help
>> [3] http://www.R-project.org/posting-guide.html
>>
>
	[[alternative HTML version deleted]]

R help - Nov 2018 - saveRDS() and readRDS() Why? [solved, pretty much anyway)

[R] saveRDS() and readRDS() Why? [solved, pretty much anyway)

[R] saveRDS() and readRDS() Why? [solved, pretty much anyway)

[R] saveRDS() and readRDS() Why? [solved, pretty much anyway)