Using lib Rstreams and gzfile()

Tue, Dec 11, 2001 3:02 AM

Rstreams has been withdrawn (as has been presaged for several months).
You don't need it any longer.

On Tue, 11 Dec 2001, Sven Garbade wrote:

Hi all,

in the last time I've intensively used Rstreams to read and write from
binary files. Now I'm wondering if it is possible to use Rsteams
functions with gzipped files. But I haven't found the trick:

p1c.gzip <- gzfile("daten/p1c_all.mea.gz", open="rb")
readBin(p1c.gzip, integer(), n=64,size=2)

 [1]    84     1   400     1   749     0     0     0     0     0
0     0
[13]     0     0     0     0     0     0     0     0     0     0
0     0
[25]     0     0     0     0     0     0     0     0 11884 25888 25977
11552
[37] 22560     0     0     0     0     0     0     0     0     0
0     0
[49]     0     0     0     0     0     0     0     0     0     0
0     0
[61]     0     0     0     0

this is ok, but then with readint from Rstreams:

seek(p1c.gzip, 0, "start")

[1] 128

readint(p1c.gzip, 64,2)

 [1] -25620 -17287  21838 -16137  -8489   3835  13806 -28067 -30452
-24244
[11]  11464  18547   5320 -24287 -13180 -14761  13486  -2902  18582
8798
[21]  29513  21369 -27830  10578  29509 -13015 -23255 -13784  25643
11960
[31]  -4233  -8515  -2123  -6311  -4455  28531  -1163  -2077   -775
-25282
[41]  -6161  -2242 -12679  -2128  27610 -16977  24278 -25369     61
11268
[51]    532 -27778 -21424 -17619 -29359 -19503 -10426  22632  28771
-20751
[61] -23825 -25437 -24301  -4469

Is it impossilble to use Rsteams function with the connection functions
from the base package or have I missed something? System R 1.3.1 on
Debian Linux.

Thanks, Sven
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Brian D. Ripley,                  ripley at stats.ox.ac.uk
Professor of Applied Statistics,  http://www.stats.ox.ac.uk/~ripley/
University of Oxford,             Tel:  +44 1865 272861 (self)
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Using lib Rstreams and gzfile()

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