search for: jarray

Dear all, I had a R segmentation fault, and then invoked debug mode and ran step by step. When I reached "terms(Y~X1*X2*...*X16)", I would then have "segmentation" fault. However, if I just ran this under regular "R interactive" mode, it would be fine though taking long time. My questions are: 1. Is there a known limit of terms for a formula? 2. Why does the

Dear all, I had a R segmentation fault, and then invoked debug mode and ran step by step. When I reached "terms(Y~X1*X2*...*X16)", I would then have "segmentation" fault. However, if I just ran this under regular "R interactive" mode, it would be fine though taking long time. My questions are: 1. Is there a known limit of terms for a formula? 2. Why does the

...uál... > > 2016-07-26 13:46 GMT+02:00 Alexa Aristizabal < > alexa.aristizabal06 en gmail.com> > : > > > Hola Javier, de antemano muchas gracias por tu ayuda! :) > > > > He intentado replicar tu script pero sale el siguiente error: > > > > Error in .jarray(v) : > > Java Exception <no description because toString() failed>.jarray(v)<S4 > > object of class "jobjRef"> > > > saveWorkbook(exc) > > Error in .jcheck() : > > Java Exception <no description because toString() > > failed>.jc...

Dear all, thank you for your hints. I would prefer to do not use Rserve as Dirk mentioned. @Simon I have full control over the Java implementation - I can adapt the code that I use for the communication R <-> Java. > You can natively access structures on each side. The fastest way is to > use R representation (column-oriented) in Java - that is much faster > than any kind of

...put 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. The only way I can think of to solve this is to modify the java code to allow me to upload a row of the matrix one at a time. Any other ideas? > require(rJava); Loading required package: rJava > t = rbind(c(1,2,3),c(2,3,4),c(1,2,10)); > .jin...

You can pass the entire df, example: > data(iris) > iris$sp = as.character(iris$Species) > o=.jarray(lapply(iris, .jarray)) > .jcall("C",,"df",o) df, 6 variables [0]: double[150] [1]: double[150] [2]: double[150] [3]: double[150] [4]: int[150] [5]: String[150] Java code: public class C { static void df(Object df[]) { int n; System.out.pr...

...m 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 v = m + 10] Here the JTest class has a method named myfunc that accepts a double[][] and returns a double[][]. It simply adds 10 to every element. The parameter 'evalArray' is confusing because when evalArray=TRUE the result is NOT evaluated (a list is returne...

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 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

...hared -L/usr/local/lib -o rJava.so callJNI.o initJNI.o Rglue.o rJava.o -L -ljvm -L/usr/local/lib/R/lib -lR ** R ** help >>> Building/Updating help pages for package 'rJava' Formats: text html latex example accessOp text html latex example jarray text html latex example jarrayRef-class text html latex jcall text html latex example jcast text html latex example jfloat-class text ht...

...e[1]: Leaving directory `/tmp/R.INSTALL.G32323/rJava/jri' ** R ** inst ** preparing package for lazy loading ** help >>> Building/Updating help pages for package 'rJava' Formats: text html latex example accessOp text html latex example jarray text html latex example jarrayRef-class text html latex jcall text html latex example jcast text html latex example jcastToArray text ht...

...:786: error: ?env? undeclared (first use in this function) Rglue.c:793: error: ?jbyteArray? undeclared (first use in this function) Rglue.c:793: error: expected ?;? before ?a? Rglue.c:794: error: ?a? undeclared (first use in this function) Rglue.c:795: warning: implicit declaration of function ?new_jarrayRef? Rglue.c:795: warning: return makes pointer from integer without a cast Rglue.c:797: error: ?jcharArray? undeclared (first use in this function) Rglue.c:797: error: expected ?;? before ?a? Rglue.c:799: warning: return makes pointer from integer without a cast Rglue.c:801: error: ?jintArray? unde...