How is this a bug in R? First, multicore is not R. Second, you're
running multicore with GUI code loaded which it explicitly tells you
that it won't work. Third, the code you provided does produce correct
PDFs (tested on the same platform you provided) in a clean session
(unsurprisingly).
Cheers,
Simon
On Jan 15, 2010, at 9:15 , kolle...@stat.math.ethz.ch wrote:
The attached code produces corrupted pdfs (test2.pdf, test4.pdf and
test5.pdf). The resulting pdf depends on how many cores are
available on
the machine.
I don't see why there should be any difference between the pdfs
(exept for
the timestamp). Doing many operations involving mclapply can
increase the
size of the resulting pdf by ten times!
Thank you for checking this.
require(multicore)
pdf('test.pdf')
y <- unlist(lapply(1:50, identity))
plot(y)
print(y)
dev.off()
options(cores = 3)
pdf('test2.pdf')
y <- unlist(mclapply(1:50, identity))
plot(y)
print(y)
dev.off()
pdf('test3.pdf')
y <- unlist(lapply(1:50, identity))
plot(y)
print(y)
dev.off()
options(cores = 2)
pdf('test4.pdf')
y <- unlist(mclapply(1:50, identity))
plot(y)
print(y)
dev.off()
options(cores = 8)
pdf('test5.pdf')
y <- unlist(mclapply(1:50, identity))
plot(y)
print(y)
dev.off()
--please do not edit the information below--
Version:
platform = x86_64-unknown-linux-gnu
arch = x86_64
os = linux-gnu
system = x86_64, linux-gnu
status =
major = 2
minor = 10.1
year = 2009
month = 12
day = 14
svn rev = 50720
language = R
version.string = R version 2.10.1 (2009-12-14)
Locale:
LC_CTYPE
=
de_CH
.UTF
-8
;LC_NUMERIC
=
C
;LC_TIME
=
en_US
.UTF
-8
;LC_COLLATE
=
de_CH
.UTF
-8
;LC_MONETARY
=
C
;LC_MESSAGES
=
de_CH
.UTF
-8
;LC_PAPER
=
de_CH
.UTF
-8
;LC_NAME
=
C
;LC_ADDRESS
=C;LC_TELEPHONE=C;LC_MEASUREMENT=de_CH.UTF-8;LC_IDENTIFICATION=C
Search Path:
.GlobalEnv, package:skewt, package:rgl, package:ggplot2,
package:reshape, package:plyr, package:proto, package:VGAM,
package:stats4, package:splines, package:latticeExtra,
package:RColorBrewer, package:doMC, package:multicore,
package:foreach, package:codetools, package:iterators,
package:abind, package:seqinr, package:mvbutils, mvb.session.info,
package:tools, package:robust, package:rrcov, package:pcaPP,
package:mvtnorm, package:robustbase, package:MASS, package:glmmML,
package:playwith, package:grid, package:gWidgetsRGtk2,
package:cairoDevice, package:lattice, package:gWidgets,
package:graphics, package:grDevices, package:datasets,
package:fortunes, package:sfsmisc, package:stats, package:utils,
package:methods, Autoloads, package:base
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