[R] saveRDS() and readRDS() Why? [solved, pretty much anyway)
p_connolly
p_connolly @ending from @ling@hot@co@nz
Tue Nov 13 04:10:20 CET 2018
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,
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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,
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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,
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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,
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,
0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
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,
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0x32, 0x8c, 0x3b, 0xcc, 0x57, 0x7e, 0x54, 0x5f, 0xf5, 0xef, 0x0c,
0x9e, 0x33, 0x3d, 0x7f, 0xb2, 0xb7, 0x32, 0xc8, 0x5f, 0xeb, 0xa0,
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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,
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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,
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0xb2, 0xc8, 0x31, 0x23, 0xcb, 0x8c, 0x1d, 0xa3, 0xbf, 0x13, 0x64,
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0x67, 0xa7, 0x98, 0xc3, 0x24, 0xeb, 0x79, 0x92, 0x7e, 0x47, 0x69,
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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 using 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 using 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 using cbs.dk Priv: PDalgd using gmail.com
>
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