[R] hist densities
Hi there, I was wondering why x-rnorm(n=5000,mean=1.5,sd=0.25) h-hist(x) sum(h$density) [1] 10 I thought the integral of the histogram should be one? These seems strange to me, or am I being silly... Regards Luke Spadavecchia PS. I'm using R 2.5.1 on Mac OSX __ R-help@r-project.org mailing list https://stat.ethz.ch/mailman/listinfo/r-help PLEASE do read the posting guide http://www.R-project.org/posting-guide.html and provide commented, minimal, self-contained, reproducible code.
Re: [R] question on image() function?
You could try using levelplot from the lattice package: library(lattice) levelplot(mcpvalue~x+y) failing that, interpolate them to a grid using akima or fields then display with image L On 8 Nov 2007, at 18:13, Duncan Murdoch wrote: On 11/8/2007 11:51 AM, zhijie zhang wrote: Dear friends, My dataset is like the following: xy mcpvalue 0.4603578 0.6247629 1.001 0.4603715 0.62477881.001 0.4603852 0.6247948 1.001 0.4110561 0.5664841 0.995 The x and y variables are unsorted. I use the function image(x,y,mcpvalue) to generate a plot, but the error is that increasing 'x' and 'y' values are expected. So i use image(x=seq(min(x),max(x)), y=seq(min(y),max(y)),z=as.matrix (result$mcpvalue)) to do it again, but there is still an error dimensions of z are not length(x)(-1) times length(y)(-1). Anybody can show me how to use the image() correctly with the original x/y unsorted? You can't, it doesn't know how to handle that kind of data. image() is designed to display a matrix of values. The x and y values tell it where to put the rows and columns of the matrix. You have a set of points. You need to fit a surface to them, evaluate the surface on a grid, and pass that to image(). There are many ways to do that; the akima package has the interp() function for instance. Duncan Murdoch __ R-help@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. __ R-help@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.
[R] Polygon shading line colors
Hi there, I'm having trouble working out how to change the colors of polygon shading lines. If I plot a polygon with polygon(poly,density=30,borders=gray(0.5)) I get gray borders but black shading lines; I have tried adding col=gray(0.5), bg=gray(0.5) and fg=gray(0.5), but no luck. How can I change the colors of the shading? The help file doesn't seem to detail this, so any suggestions would be greatly appreciated. Many thanks Luke Spadavecchia __ R-help@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.
[R] x11 window queston
Hi all, Sorry for reposting, but I think my last request was a little confusing. I am trying to keep my x windows open after I exit the R session, so when I have produced a series of plots from R I would like to retain the graphics as x windows after exiting with q(). This would be particularly useful for batch mode execution of R scripts; at the moment when I run scripts with R CMD BATCH myscript.R my graphics flash up in the x window momentarily, but disappear as R exits (providing x11 is running and I use Sys.setenv(DISPLAY=:0.0) before opening x with x11()). Is it possible to retain these (as it is in GNUPLOT using the persist option), both in interactive and batch mode? I am able to keep the plot open for examination by adding a long serial loop to the end of the script, but this is not a particularly good solution. I am able to save the contents of the x windows as pdf, bmp etc with dev.print(), but I would rather retain the graphics in an open x window, so I could keep the plots on screen after a system call to R from other programs. Many thanks Luke Spadavecchia PS. I am running R-2.4.1 on Mac OS X (intel processor), and Windows XP with the same results on both systems __ R-help@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.
Re: [R] X11 graphics windows under CMD BATCH
Hi Dirk, Thanks for your useful advice, although I am not sure I fully understand your response. I am able to open x11 windows from R CMD BATCH both in windows XP,MAC OS X and Linux (on various machines I use), providing the relevant Sys.setenv() commands are in the script I call prior to plotting commands. My problem is that the X11 windows only persist as long as the script is running, and disappear when R exits - which is very rapid for most plots (it is only when the script imports a shapefile using maptools or something like that that the window is open long enough to really examine the plot). Is there a way when running R (from batch mode or otherwise) of 'saving' X11 windows, and keeping them open after the R session is complete? I don't really want to write the graphics to file, because the repeated calls from the Fortran code would overwrite each other, and the idea is to do rapid appraisal of the simulated annealing schedule, to check that mixing/cooling are progressing in an efficient and useful manner. Would using cairo (which I can't seem to get to work at the moment) allow me to do this? I'm not sure it's an x11 problem, but rather something to do with the way that R and X11 communicate? Many thanks Luke Spadavecchia __ R-help@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.
[R] X11 graphics windows under CMD BATCH
Hi there, I am trying to plot some output from a FORTRAN (ifort) program using R (2.5.1) under batch mode. In the FORTRAN code, I call R in batch mode to execute a script called fig1.R using something like PROGRAM test USE IFPORT IMPLICIT NONE DO !Some function which makes an output file called ~/fortran_output.txt CALL myfunc() !System call to R plotting routine CALL SYSTEM (open -a x11) CALL SYSTEM (R CMD BATCH ~/fig1.R) END DO END PROGRAM test The system call goes through fine, and R fires up and processes the contents of fig1.R which are something like: Sys.setenv(DISPLAY=:0.0) Data-read.table(~/fortran_output.txt) x11(width=12) plot(Data$var1,Data$var2) My problem is that I want the x11 window which the plot appears in to persist after R exits; currently the figure flashes up momentarily, then disappears as R exits. One option is to try and stall the exit of R, by sticking a big loop at the end of the code, but this means my FORTRAN program is hanging about waiting for the loop to finish, and my plot still disappears. Is there any equivalent to -persist in GNUPLOT to allow the x11 window to stay open after R exits, so I can examine the results while the program continues? To put all this in context, I want to examine the results of a simulated annealing process at each temperature reduction stage of the annealing schedule. I am not doing the annealing in R for reasons of speed: I only want to use R as a graphics engine. Many thanks Luke Spadavecchia __ R-help@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.
