I have run into some surprising behaviour when plotting data in a 3x2 grid: random parts of the data on my graphs aren't rendered. Not on screen, not on file, and not when I send the plot to a printer. I don't get any error messages either. When I do the individual plots (not in a grid) they are each rendered correctly.
My questions are: - Has anyone encountered something like this, or is it particular to my installation? - Have I hit one of R's limits, and can I increase that limit? - Would there be any workarounds that will allow me to get those 6 graphs in one single plot without thinning the data? The circumstances of the problem are: The data I am plotting consists of 4 dataframes and 4 strings: d1 - d4 are dataframes of dimension 308160 x 21 that contain a column named "det_ok_num". BPS1 - BPS4 are strings I'm running R 1.51 under Windows XP and I have 2 Gb of core memory, 800 Mb free, and 5 Gb swappable. All variables are in memory; the total amount of memory used by the Rgui process is slightly less than 400Mb. The plot command I use is Fplot6_Det_OK (d1, d2, d3, d4, d1, d2, BPS1, BPS2, BPS3, BPS4, BPS1, BPS2) I am using the following two small plot functions: Fplot6_Det_OK = function(d1, d2, d3, d4, d5, d6, BPS1, BPS2, BPS3, BPS4, BPS5, BPS6) { # Purpose: Plot detector status for MONICA loops # make 3x2 subplot window and plot 6 loops # # op <- par(no.readonly = TRUE) par_plot6 <- par(mfrow = c(3, 2)) FplotDetOK (d1, BPS1) FplotDetOK (d2, BPS2) FplotDetOK (d3, BPS3) FplotDetOK (d4, BPS4) FplotDetOK (d5, BPS5) FplotDetOK (d6, BPS6) par(op) } FplotDetOK = function(d, BPS) { # Purpose: Plot detector status for MONICA loops # # subtitleStr = paste ("BPS = ", BPS) plot(d$det_ok_num, pch=".", col="blue", sub = subtitleStr) } Charles Lindveld Centre for Transport Studies Imperial College London [[alternative HTML version deleted]] ______________________________________________ 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.