similar to: rJava and matrices

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,

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, 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 <-

Hello all, I'm having trouble creating an adjacency matrix. Basically, I need to turn the following distance matrix into an adjacency matrix based on whether values are >1.5 or not. If they are >1.5, then the returned value should be 0. If they are =<1.5, then the returned value should be 1. DistanceMatrix: A B C D E [1,]

Dear Dr.Goslee and anyone may intrested in matrix manipulate, I am using your ecodist to do mantel and partial mantel test, I have locality data and shape variation data, and the two distance matrixs are given as belowings. When I run the analysis, it is always report that the matrix is not square, but I didn't know what's wrong with my data. Would you please help me on this. I am quite

Hola. En mi caso, no he podido resolver los problemas con el Java para usar XLConnect, que en los papeles me parece el mejor. Supongo que algo de la arquitectura del sistema o bien de la relación entre el Java, el R y el RStudio. Así que utilizo library(openxlsx) write.xlsx(datos, file = "EDA1.xlsx") #donde datos es el objeto que quiero guardar. Requiere instalar el RTools, según tipo y

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

Hello all, I am brand new to R and doing an exercise for a class. I need to find the nearest neighbour for points in the following matrix: > DistanceMatrix x1 x2 x3 x4 x5 [1,] 0.000000 2.828427 1.581139 2.236068 2.000000 [2,] 2.828427 0.000000 1.581139 4.123106 2.000000 [3,] 1.581139 1.581139 0.000000 2.549510 2.121320 [4,] 2.236068 4.123106 2.549510

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

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 =

Hello I am trying to import the attached file Curva LIBOR to R. I am trying to use the following commands and obtaining the following errors > res <- read.xlsx("C:\\Users\\FELIPE PARRA\\Documents\\Quantil\\Federacion\\Curva LIBOR.xlsx", 4) Error en .jcall(rowCells[[ic]], "I", "getColumnIndex") : RcallMethod: invalid object parameter > res <-

Hi all! I recently tried to install the rJava package on my notebook (Debian Etch / Kernel 2.6.15 / jdk 1.5.0-5 / R 2.2.1 / rJava ?? the repo one, have a look below). I compiled R myself with "--with-readline=no" and "--enable-R-shlib flags". Now, each time loading the library rJava I encouter the same error. I reinstalled several times (as root), always the same problem:

Dear Rxperts, Through Windows OS, I created shortcuts (paste as shortcut) to excel spreadsheets ( with "xlsx" as the file extension). I wasn't able to read the shortcuts through R and using "read" functions of "xlsx" package. exf <- "a1.xlsx.lnk" > read.xlsx(exf,1) Error in .jcall("RJavaTools", "Ljava/lang/Object;",

I am trying to invoke an in house developed java program from R and am running into some confusing issues. I've written this function: DoNormalSkew <- function() { .jaddClassPath("U:/development/software/untilities/ELVeSkew/dist/ELVeSkew.jar") .jpackage("U:/development/software/utilities/ELVeS/dist/ELVeSkew.jar") .jcall("java/lang/System", "V",

Dear R useRs, I have a problem with nls.lm function of minpackl.lm package. I need to fit the Van Genuchten Model to a set of data of Theta and hydraulic conductivity with nls.lm function of minpack.lm package. For the first fit, the parameter estimates keep changing even after 1000 iterations (Th) and I have a following error message for fit of hydraulic conductivity (k); Reason for

Buenos días a todos! Estoy trabajando con una base de datos que directamente he descargado de internet y después de prepararla un poco necesito exportarla a Excel he intentando con las dos opciones que mencionaré al final pero ninguna funciona, de qué otra manera puedo exportar esos datos a Excel... muchas gracias por su ayuda y pronta respuesta! 1) library(xlsx) library(rJava)

Hi, I have 'R' code in file. saved it as exmaple.r here is the code....... library("hopach") GSE <- read.table("gene_expression_data",sep="\t",header=TRUE,row.names=TRUE) gene.dist <- distancematrix(t(GSE),d="euclid") gene.hobj <- hopach(t(GSE), dmat=gene.dist, mss="med") labelstosil(gene.hobj$cluster$label,gene.dist) I dont

Hi All, I have written a Java MapReduce code that runs on Hadoop. My intention is to create an R package which will call the Java code and execute the job. Hence, I have written a similar R function. But when I call this function from R terminal, the Hadoop job is not running. Its just printing few lines of warning messages and does nothing further. Here is the execution scenario: *>

Hello there, I want to create a string from strings and numbers, here is my code: str <- "name" & toString(20) but it returns me this error: Error in toString(20) : could not find function ".jcall" what did I do wrong? I couldn't find this error anywhere... -- View this message in context: http://n4.nabble.com/Error-with-toString-tp1290327p1290327.html Sent from