R gurus, I'm having an issue with the appearance of image plots produced by R-2.13.1. When I plot an image (example code pasted below), thin white lines appear between rows and columns of pixels. The location of the lines seems somewhat random and change as the graphics device is re-sized. This occurs using a range of graphic devices (windows, png, bmp, jpeg, tiff, pdf), on two different machines (windows 7-64 bit and windows XP-32 bit) but not when using 2.13.0 on either machine. Do others have this issue? Any possible solutions? Regards, Alan x <- y <- seq(-4*pi, 4*pi, len=27) r <- sqrt(outer(x^2, y^2, "+")) image(z = z <- cos(r^2)*exp(-r/6), col=gray((0:32)/32))> sessionInfo()R version 2.13.1 (2011-07-08) Platform: x86_64-pc-mingw32/x64 (64-bit) locale: [1] LC_COLLATE=English_United States.1252 [2] LC_CTYPE=English_United States.1252 [3] LC_MONETARY=English_United States.1252 [4] LC_NUMERIC=C [5] LC_TIME=English_United States.1252 attached base packages: [1] stats graphics grDevices utils datasets methods base other attached packages: [1] rj_0.5.5-4 loaded via a namespace (and not attached): [1] tools_2.13.1 [[alternative HTML version deleted]]
Hi Alan, Thank you for the reproducible example. One way to solve it is setting "len" to a bigger number, e.g. len = 500. However, this might slow down the plotting. HTH, Jorge On Aug 16, 2011, at 7:41 PM, Swanson, Alan wrote:> R gurus, > I'm having an issue with the appearance of image plots produced by R-2.13.1. When I plot an image (example code pasted below), thin white lines appear between rows and columns of pixels. The location of the lines seems somewhat random and change as the graphics device is re-sized. This occurs using a range of graphic devices (windows, png, bmp, jpeg, tiff, pdf), on two different machines (windows 7-64 bit and windows XP-32 bit) but not when using 2.13.0 on either machine. Do others have this issue? Any possible solutions? > Regards, > Alan > > x <- y <- seq(-4*pi, 4*pi, len=27) > r <- sqrt(outer(x^2, y^2, "+")) > image(z = z <- cos(r^2)*exp(-r/6), col=gray((0:32)/32)) > >> sessionInfo() > R version 2.13.1 (2011-07-08) > Platform: x86_64-pc-mingw32/x64 (64-bit) > > locale: > [1] LC_COLLATE=English_United States.1252 > [2] LC_CTYPE=English_United States.1252 > [3] LC_MONETARY=English_United States.1252 > [4] LC_NUMERIC=C > [5] LC_TIME=English_United States.1252 > > attached base packages: > [1] stats graphics grDevices utils datasets methods base > > other attached packages: > [1] rj_0.5.5-4 > > loaded via a namespace (and not attached): > [1] tools_2.13.1 > > [[alternative HTML version deleted]] > > ______________________________________________ > R-help at r-project.org mailing list > https://stat.ethz.ch/mailman/listinfo/r-help > PLEASE do read the posting guide http://www.R-project.org/posting-guide.html > and provide commented, minimal, self-contained, reproducible code.
Hi: This has been reported several times in the past several weeks; try upgrading to the patched version of 2.13.1. That seems to have worked for most people who've encountered the problem. HTH, Dennis On Tue, Aug 16, 2011 at 4:41 PM, Swanson, Alan <alan.swanson at umconnect.umt.edu> wrote:> R gurus, > I'm having an issue with the appearance of image plots produced by R-2.13.1. ?When I plot an image (example code pasted below), thin white lines appear between rows and columns of pixels. ?The location of the lines seems somewhat random and change as the graphics device is re-sized. ?This occurs using a range of graphic devices (windows, png, bmp, jpeg, tiff, pdf), on two different machines (windows 7-64 bit and windows XP-32 bit) but not when using 2.13.0 on either machine. ?Do others have this issue? ?Any possible solutions? > Regards, > Alan > > x <- y <- seq(-4*pi, 4*pi, len=27) > r <- sqrt(outer(x^2, y^2, "+")) > image(z = z <- cos(r^2)*exp(-r/6), col=gray((0:32)/32)) > >> sessionInfo() > R version 2.13.1 (2011-07-08) > Platform: x86_64-pc-mingw32/x64 (64-bit) > > locale: > [1] LC_COLLATE=English_United States.1252 > [2] LC_CTYPE=English_United States.1252 > [3] LC_MONETARY=English_United States.1252 > [4] LC_NUMERIC=C > [5] LC_TIME=English_United States.1252 > > attached base packages: > [1] stats ? ? graphics ?grDevices utils ? ? datasets ?methods ? base > > other attached packages: > [1] rj_0.5.5-4 > > loaded via a namespace (and not attached): > [1] tools_2.13.1 > > ? ? ? ?[[alternative HTML version deleted]] > > ______________________________________________ > R-help at r-project.org mailing list > https://stat.ethz.ch/mailman/listinfo/r-help > PLEASE do read the posting guide http://www.R-project.org/posting-guide.html > and provide commented, minimal, self-contained, reproducible code. >