Hello, I'm trying to determine the width of a plotting point (in inches) in the grid package. I naively thought I could create a pointsGrob with only one point and get the width (as tried below), but this results in an object with a size of 0inches (changing cex has no effect). Does anyone have a better approach? Of course, it would be dependent upon the graphics parameters and viewport...
Thanks, Randy > library(grid) > pushViewport(viewport()) > convertX(grobWidth(pointsGrob(1, 1)), 'inches') [1] 0inches # I think we're measuring the size of the point here... # changing cex has no effect. > convertX(grobWidth(pointsGrob(1, 1, gp = gpar(cex = 3))), 'inches') [1] 0inches # If I add a second point, the size should increase... # how big is the plotting point though??? > convertX(grobWidth(pointsGrob(1:2, 1:2)), 'inches') [1] 11.1929133858268inches > sessionInfo() R version 2.4.1 (2006-12-18) i386-apple-darwin8.8.2 locale: C attached base packages: [1] "grid" "stats" "graphics" "grDevices" "utils" "datasets" [7] "methods" "base" ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ Randall C Johnson Bioinformatics Analyst SAIC-Frederick, Inc (Contractor) Laboratory of Genomic Diversity NCI-Frederick, P.O. Box B Bldg 560, Rm 11-85 Frederick, MD 21702 Phone: (301) 846-1304 Fax: (301) 846-1686 ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ ______________________________________________ R-help@stat.math.ethz.ch 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.
