[R] R.matlab questions Hello: 	  Two questions about R.matlab: 	  1.  How to break a hung R-Matlab connection? 	  2.  How to execute R.matlab commands from within a function? 	 BREAKING AN R-Matlab CONNECTION 	  Sometimes an attempted R.matlab command locks up my computer.  The  standard R break process interrupts the R command.  However, when I do  that, the command to Matlab is still pending, and I don't know an easy  way to interrupt that.  A simple, self-contained example appears below. 	  The easiest way I've found so far to interrupt Matlab is to quit R.  This will finally release Matlab. CALLING R.matlab FUNCTIONS FROM WITHIN A FUNCTION 	  An R.matlab function call that works as a direct R command hangs for  me when executed within an R function.  A simple, self-contained example  appears below. How can I work around this? 	  Thanks, 	  Spencer Graves Using Matlab 7.3.0 (R2006b) under Windows XP Pro. > sessionInfo() R version 2.5.0 (2007-04-23) i386-pc-mingw32 locale: LC_COLLATE=English_United States.1252;LC_CTYPE=English_United States.1252;LC_MONETARY=English_United States.1252;LC_NUMERIC=C;LC_TIME=English_United States.1252 attached base packages: [1] "splines"   "stats"     "graphics"  "grDevices" "utils"     "datasets" [7] "methods"   "base" other attached packages: R.matlab     R.oo      fda      zoo   "1.1.3"  "1.2.7"  "1.2.1"  "1.3-1" ################### #EXAMPLE:  CALLING R.matlab FROM WITHIN A FUCTION? # 1.  library(R.matlab) library(R.matlab) # 2.  Create a Matlab client object to support communications (matlab <- Matlab()) #     Optionally set setVerbose(..., -2) to get max info setVerbose(matlab, -2) # 3.  Start Matlab # 4.  Ask Matlab to become a slave #Matlab>> MatlabServer # 5.  Open the connection from R to MatlabServer (isOpenMatlab <- open(matlab)) # NOTE:  If Matlab is not frozen: #R> close(matlab) # returns local control to Matlab. # Control of Matlab can be returned to R at any time # by repeating steps 4 & 5. # 6.  matlab.compute.a compute <- evaluate(matlab, "a = 1+2") (a0 <- getVariable(matlab, "a")) # The above works fine for me. # 7.  R.matlab.compute.a function R.matlab.compute.a <- function(text="a=1+2", matlabClient=matlab){ # text = a Matlab expression that stores 'a'    ev0 <- evaluate(matlabClient, text)    getVariable(matlabClient, "a") } # The following locks up both R and Matlab for me: R.matlab.compute.a() ______________________________________________ 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.