On 04/03/2010 10:32 PM, David Winsemius wrote:
On Mar 4, 2010, at 9:47 PM, jonas garcia wrote:
When I opened the file with a hex-editor, the problematic character
turned out to be “1a”
I am attaching a sample DAT file with 3 lines (the second line is
the one with the undesirable character).
The furthest I could get was through readBin:
tmp<- readBin("new.dat", what = "raw", n=100000000)
[1] 30 32 3a 33 35 3a 33 32 2c 20 34 34 30 33 2c 20 33 37 2e 31 31
34 2c 2d 32 30 2e 38 33 36 2c 31
[33] 35 35 2e 39 2c 30 30 2e 37 36 2c 31 31 35 36 0d 0a 30 32 3a 33
35 3a 33 35 2c 20 34 34 33 32 2c
[65] 20 33 37 2e 31 31 34 2c 2d 32 30 2e 38 33 36 2c 31 35 35 2e 38
2c 1a 30 2e 38 31 2c 31 31 35 37
[97] 0d 0a 30 32 3a 33 35 3a 33 39 2c 20 34 34 36 37 2c 20 33 37 2e
31 31 34 2c 2d 32 30 2e 38 33 36
[129] 2c 31 35 35 2e 38 2c 30 30 2e 38 31 2c 31 31 35 38
tmp[87]
[1] 1a
I got a different "interpretation" of that character when I let R look
at it. And I cannot figure out why \032 should be causing problems??? :
Hex 1a and octal 032 both correspond to Ctrl-Z, which is the MSDOS EOF
marker. I forget whether R's text reading routines pay attention to
that, or whether it's the C runtime, but it makes sense that it would
cause problems on Windows.
Duncan Murdoch
> tmporg <- readLines(con="/Users/davidwinsemius/Library/Mail
Downloads/new.dat")
Warning message:
In readLines(con = "/Users/davidwinsemius/Library/Mail Downloads/
new.dat") :
incomplete final line found on '/Users/davidwinsemius/Library/Mail
Downloads/new.dat'
> tmporg
[1] "02:35:32, 4403, 37.114,-20.836,155.9,00.76,1156"
[2] "02:35:35, 4432, 37.114,-20.836,155.8,\0320.81,1157"
[3] "02:35:39, 4467, 37.114,-20.836,155.8,00.81,1158"
> gsub("\\\032", ' ', tmporg)
[1] "02:35:32, 4403, 37.114,-20.836,155.9,00.76,1156" "02:35:35, 4432,
37.114,-20.836,155.8, 0.81,1157"
[3] "02:35:39, 4467, 37.114,-20.836,155.8,00.81,1158"
> read.table(textConnection(gsub("\\\032", ' ', tmporg) ) ,sep=",")
V1 V2 V3 V4 V5 V6 V7
1 02:35:32 4403 37.114 -20.836 155.9 0.76 1156
2 02:35:35 4432 37.114 -20.836 155.8 0.81 1157
3 02:35:39 4467 37.114 -20.836 155.8 0.81 1158
Looks like gsub might work well .... as long as you can get agreement
on what the character really is.
> sessionInfo()
R version 2.10.1 RC (2009-12-09 r50695)
x86_64-apple-darwin9.8.0
locale:
[1] en_US.UTF-8/en_US.UTF-8/C/C/en_US.UTF-8/en_US.UTF-8
attached base packages:
[1] splines stats graphics grDevices utils datasets
methods base
other attached packages:
[1] Design_2.3-0 Hmisc_3.7-0 survival_2.35-7
loaded via a namespace (and not attached):
[1] cluster_1.12.1 grid_2.10.1 lattice_0.17-26 tools_2.10.1
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