Hi,

i have a problem with png device
that is my error log
"> png(file="figure1.png");plot(significant,type="scatter");dev.off()
Error in X11(paste("png::", filename, sep = ""), width, height, pointsize,
:
        unable to start device PNG
In addition: Warning message:
unable to open connection to X11 display '' "
i searched the mailing list,someone said because no libpng installed
but i had installed the libpng and libpng-devel
and i use Fedora Core4
my R version is 2.4.0 and i use RPMs to install

any solution?

Thanks

Li
-- 
DaoFeng,Li
Box A1053 China Agriculture University,
No.2 Yuanmingyuan Rd.West Haidian District
Beijing,100094
P.R.China
Tel:+86-10-62814726
Cell:+8613121987798

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