similar to: rJava garbage collect

On 6 February 2018 at 04:34, Benjamin Tyner <btyner at gmail.com> wrote: > Hi > > Does rJava offer a way to instruct the JVM to perform a garbage collection? Do you really, really need to run the garbage collector? Consider reading: https://stackoverflow.com/questions/5086800/java-garbage-collection Regards Martin

rJava offers a mechanism to call arbitrary methods in Java. Wouldn't you use that mechanism to call whatever you would call if you were programming in Java (e.g. System.gc)? -- Sent from my phone. Please excuse my brevity. On February 5, 2018 7:34:17 PM PST, Benjamin Tyner <btyner at gmail.com> wrote: >Hi > >Does rJava offer a way to instruct the JVM to perform a garbage

After some trial and error I figured out how to pass matrices from R to java and back using rJava, but this method is not documented and I wonder if there is a better way? Anyway, here is what I found works: (m = matrix(as.double(1:12),3,4)) [shows m as you would expect] jtest <- .jnew("JTest") (v <- .jcall(jtest, '[[D], 'myfunc', .jarray(m), evalArray=FALSE)) [shows

Hi list, I'm wanting to use a matrix as input to some java code, but I seem to be unable to do this (See code below). When searching online for a solution I found that rJava 0.5-2 (the version under development not yet in CRAN) is adding "direct support for raw vectors as method parameters". Is this related? I also tried to use .jarray / .jcast in various combinations to no avail.

I have been experiencing issues with an R script hanging when connecting to an Oracle database. To help debug, I found a function here in the nabble forum and made a small test script: #!/usr/bin/Rscript --no-restore --no-save --no-init-file library("RJDBC") drv<-JDBC("oracle.jdbc.OracleDriver","/home/oracle/lib/ojdbc6.jar", "'") dbCheck =

Dear All, I'd like to use Weka functions that are not implemented (do not have interface) in RWeka, like the Remove function and others in the future! The .java() functionality is for that purpose but I haven't seen any example with Weka functions. Could anyone give me hand in how to do it? For instace if I want to use the weka.filters.unsupervised.attribute.Remove? 1. in the R console,

Hi, I am trying to integrate my Java program with R using rJava package. I want to execute the whole Java program from R. The main() method in my Java code calls all the other defined methods. So, I guess I have to call the main() method in .jcall. An example Java code: *class A { public static int mySum(int x, int y) { return x+y; } public static void

I am desperate for help. I am trying to get the RJDBC and rJava .5to work on both my windows xp and linux Redhat EL5 Server. On both I get a ava.lang.ClassNotFoundException when calling JDBC(). My example is require(RJDBC) classPath='C:\\libraries\\mysql-connector-java-5.1.3-rc\\mysql-connector-java-5.1.3-rc-bin.jar' driverClass=c("com.mysql.jdbc.Driver") drv <-

I haven't had time to try using R for over a year, but have a colleage who wants to. We work with time series and our current version of our calendar-time subroutines in java converts both directions between linear time and calendar. We have used calendar time since year 1965 starting out then with Fortran. Calendar time can be CnYrMoDa | CnYrMoDaHr | CnYrMoDaHrMn | CnYrMoDaHrMnSc |

I'm writing a package that successfully calls Java from R using rJava. When R sends my Java function bad data (through .jcall()), I get the error message details (when I run it on a console) and then: Java requested System.exit(1), closing R. Is there a way to call .jcall so that when Java receives bad data, the Java function will exit, but won't take down R with it? Thanks, Sigal

Hi, I have a MapReduce Java code, which I am calling from R using rJava. I have prepared the R package and tested that successfully. But when I deployed the package in a cluster and executed it, I am getting ClassNotFoundException. If I run the same job directly without integrating with R, it runs perfectly. Here is my R code: library(rJava) muMstSpark <- function(mesosMaster = NULL, input =

I have been futzing around for days tying to get rJava to install on my freshly build Debian Lenny installation. I have R-2.9.1 installed from source in my R_HOME directory and R-2.7.1 installed via apt-get install r-recommended. I was tried many different things, but by accident started up R-2.7.1 as root and viola, successful install. I immediately exited out of R-2.7.1 and started R-2.9.1 as

Basically, I?m trying to install rJava on my windows XP machine. I think I have succeeded in doing so as it appears in the list when i type library() in R. However, when i type ?library(rJava)? I get an error dialog box saying: 'This application has failed to start because jvm.dll was not found. Re-installing the application may fix this problem' When I press 'OK' on the dialog

Hi, Dirk Eddelbuettel advised me to write here. Here is my original letter to him: I would like to enquire about package r-cran-rjava on Debian jesse. It seems that if default-jre package is not installed, but openjdk-7-jre is installed, then library(rJava) in R fails. I?ve been bitten by this today and I wonder whether this an issue of mine, or is this a possible bug. My server admin used

Hi, > Le 17 mai 2017 ? 00:42, Dirk Eddelbuettel <edd at debian.org> a ?crit : > > > On 8 May 2017 at 15:39, Vaidotas Zemlys wrote: > | Hi, > | > | Dirk Eddelbuettel advised me to write here. Here is my original letter to him: > | > | I would like to enquire about package r-cran-rjava on Debian jesse. It seems that if default-jre package is not installed, but

Dear R-developers, I am having trouble installing rJava on R 2.8.0 / debian etch. What goes wrong? I am happy for every advice. Best, Christian > install.packages("rJava") Warning in install.packages("rJava") : argument 'lib' is missing: using '/nfs/compdiag/package/R/lib/bioconductor/release_2.3/x86_64' --- Please select a CRAN mirror for use in

Hi, I was trying install rJava package but failed to install with below error: *trying URL 'https://cloud.r-project.org/src/contrib/rJava_0.9-11.tar.gz <https://cloud.r-project.org/src/contrib/rJava_0.9-11.tar.gz>'* *Content type 'application/x-gzip' length 675188 bytes (659 KB)* *==================================================* *downloaded 659 KB* ** installing

Hi, I would like to test the new package RGG (R Gui Generator). This package requires the installation of several other package. One of them is rJava. I installed sun-java6-jdk and run the R CMD javareconf but the installation still fails ! Do you have any ideas ? * Installing *source* package ‘rJava’ ... checking for gcc... gcc -std=gnu99 checking for C compiler default output file

Bare test code: My simple Java test class source and R test code follow: public class RJavTest { public static void main(String[]args) { RJavTest rJavTest=new RJavTest(); } public final static String conStg="testString"; public final static double con0dbl=10000001; public final static double[]con1Arr=new double[] { 10001,10002,10003,10004,10005,10006 }; public final static

Esteemed useRs and Devs, Attempts to update package:rJava to the latest version have failed. See my code and output below. Notably, as suggested here http://stackoverflow.com/questions/3311940/r-rjava-package-install-failing $ sudo apt-get install r-cran-rjava ran successfully without error or warning, but my rJava package is not updated, and remains un-updatable... Greatly appreciate any