[Rd] Using multicore with an open pdf device results in corrupt pdf (PR#14186)

From: <kollerma_at_stat.math.ethz.ch>
Date: Fri, 15 Jan 2010 15:15:13 +0100 (CET)


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



R-devel_at_r-project.org mailing list
https://stat.ethz.ch/mailman/listinfo/r-devel Received on Fri 15 Jan 2010 - 14:21:49 GMT

Archive maintained by Robert King, hosted by the discipline of statistics at the University of Newcastle, Australia.
Archive generated by hypermail 2.2.0, at Fri 15 Jan 2010 - 18:30:14 GMT.

Mailing list information is available at https://stat.ethz.ch/mailman/listinfo/r-devel. Please read the posting guide before posting to the list.

list of date sections of archive