Hello, Is there are an R command to refresh the graphical output?
On a linux system I'm sending commands to R through a named pipe. The R server is an infinite loop that listens on the pipe and executes received R code. But I am having a problem refreshing the graphics output. If I send a plot command down the pipe the graphical output appears. However, if a window briefly obscures the graphical output, the x11 device won't refresh the display. It would appear there is no refresh because R is busy interpreting infinite loop. Is there a way of "manually" refreshing the display? Or is there another way to get around the refresh problem? Thanks in advance, PJ The R server: # based on http://tolstoy.newcastle.edu.au/R/help/01c/2886.html stream <- fifo("R_pipe", "r", blocking=FALSE,) repeat { a <- readLines(stream) if(length(a) != 0) { if (inherits(e, "try-error")) { # error handling code here cat("Error", "\n") } } } The R client: $ mkfifo R_pipe $ cat>> R_pipe Now, I can send R commands down the pipe: Client side: x <- seq(1,10) x Server side: > x <- seq(1:10) > x [1] 1 2 3 4 5 6 7 8 9 10 So far so good. Now send a plot, e.g. plot(1:100) and obscure the resulting plot so that it needs a refresh. Voila, no refresh. ______________________________________________ R-devel@r-project.org mailing list https://stat.ethz.ch/mailman/listinfo/r-devel
