"Richard" == Richard Beare <Richard.Beare@cmis.csiro.au> writes:
Richard> 2) garbage collection. It is now easy to lose track of
Richard> memory, and this is likely to be significant because
Richard> images are usually quite big. There is a delete function
Richard> in the library, so it is possible to dispose of images
Richard> manually, but an automated method would be nice. One
Richard> option is to keep a global list of all pointers returned
Richard> from C function calls, generate a list of all image class
Richard> objects visible in R and compare the two. Any pointers
Richard> not on the image class list can be disposed. Does anyone
Richard> have any other ideas?
I'd look to embed a JVM into R and use all the power of Java for image
processing and garbage collection. I've done it with xlispstat but not
with R.
________________________________________________________________ B. Narasimhan naras@stat.stanford.edu
My guess is that that would involve rewriting the existing library written in C. Similarly, embedding the JVM still requires some communication with the Java classes, etc. and conversion between the R and Java data structures. This is where the meat of the interface lies. However, on a more positive note, the embedding of the JVM into R and S4/Splus5, John Chambers and I have been playing with, is getting very close to being finished. I have been putting some of the final details to it over the weekend. So the dynamic communication with Java (i.e. dynamic method lookup and invocation) would not be that hard. D.
_______________________________________________________________
Duncan Temple Lang duncan@research.bell-labs.com
Bell Labs, Lucent Technologies office: (908)582-3217
700 Mountain Avenue, Room 2C-259 fax: (908)582-3340
Murray Hill, NJ 07974-2070
http://cm.bell-labs.com/stat/duncan
Languages shape the way we think, and determine what
we can think about -- Benjamin Whorf
-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-
r-devel mailing list -- Read http://www.ci.tuwien.ac.at/~hornik/R/R-FAQ.html
Send "info", "help", or "[un]subscribe"
(in the "body", not the subject !) To: r-devel-request@stat.math.ethz.ch
_._._._._._._._._._._._._._._._._._._._._._._._._._._._._._._._._._._._._._._._