similar to: yajb - java-ruby bridge

Hi, I''d be interested to hear from people who have used either JRuby or one of the Java-Ruby bridges like jrb or yajb to call out to Java classes from Rails. Which bridge did you use, how did it work out? Which one do you recommend? Is anybody running Rails on JRuby on a production server, or is Rails on JRuby still to experimental for that? Thanking you in advance, Elmar

ok, i want to be able to send some data from my rails app to a CRM. The library that defines the API for talking to the CRM is written in java. I got JRuby working, which is pretty cool, but to my understanding i would have to convert my ruby on rails app to a jruby on rails app which, as far as i''ve understood, is different deal altogether and would be set up more like a java server

I don't know R absolutely, but I have to do this work for my diploma. So I'm sorry for strange message below. Please, help me anybody decides this issue. If you need any information, I'll show you all what you need. **error**:<br> > #save > #csv >file.create("C:\\Users\\Sapl\\Desktop\\NATA\\code\\Results\\Created by R\\ab_ret_banks_short_form_10.05.2006.csv")

On Wed, 20 Mar 2002, John Chambers wrote: > It wasn't entirely clear what your design goals were, but the general > question of comparing functional method languages (S, CLOS, Dylan) and > OOP languages (Java, etc) is of much interest to me, so here are some > general comments. Maybe we can then iterate on your example, with or > without r-devel. I'll keep it on r-devel

-----Original Message----- From: Patrick Connolly Sent: Friday, 9 November 2012 11:29 a.m. To: Peter Alspach Subject: Interfacing R and Weka > version _ platform x86_64-unknown-linux-gnu arch x86_64 os linux-gnu system x86_64, linux-gnu status major 2 minor 15.2 year 2012 month 10 day 26 svn rev

Hello list, I seem to have a problem with the openNLP package, I'm actually stuck in the very beginning. Here's what I did: > install.packages("openNLP") > install.packages("openNLPmodels.de", repos = "http://datacube.wu.ac.at/", type = "source") > library(openNLPmodels.de) > library(openNLP) So I installed the main package as

This SystemStackError is driving me crazy. It only takes place when testing with WEBrick - I can''t reproduce it with any tests. It is caused by calling the "missing" id method (base.rb:2435) on my ActiveRecord class. WEBrick and my tests are running as the same user, with a `ulimit -s` of 10240. Plus the query works sometimes so I don''t think this matters.

Hello, I''m having some problems when try to install rjb i get this message C:\Users\PC1090\Documents\RJB\rjb-1.3.8>ruby setup.rb config ---> bin <--- bin ---> lib <--- lib ---> ext C:/Ruby187/Ruby1.8.7/bin/ruby "C:/Users/PC1090/Documents/RJB/rjb-1.3.8/ext/extconf.rb" checking for jni.h... no *** C:/Users/PC1090/Documents/RJB/rjb-1.3.8/ext/extconf.rb failed

I am trying to call a r file named es.r which have lotes of R functions. These R functions are internally calling java functions by using ".jnew()" and ".jcall()". I have added necessary jar's to the Classpath and I am able to run es.r from command prompt . But when I tried to call it from anoter r file using source() getting Exception Error in

Hi everyone, I have trouble to use RWeka, I tried: (w=weather dataset, all preditors are nominal) > m<-J48(play~., data=w) > e<-evaluate_Weka_classifier(m,cost = matrix(c(0,2,1,0), + ncol = 2),numFolds = 10, complexity = TRUE,seed = 123, + class = TRUE) it gives me exactly what I want, but when I tried the same classifier on the other published data: (iris dataset has all numeric

Dear all I am now going to do some text analysis using R. However, the data is very noisy that I need to clean it first. I don't have much experience in the text cleaning process. Is anyone would provide help on this? If you are able to provide some similar code which was done before would be greatly appreciated. May content is mainly the Feedback data through *Phone call record*:

I''m trying to interact with a java library (Aspose Slides) inside of my Rails 3 app. I''m trying to get the rjb gem installed but I keep running into the same error when I try to start the app: [BUG] cross-thread violation on rb_gc() (null) Abort trap I''m on OSX 10.6.6, running ruby 1.8.7-p174 (via RVM) and Rails 3.0.4. I tried a couple of methods for getting this

Hi, I thought I'd like to try out JGR, but after installing the package (and dependencies) I receive the following when I try to load it: > library(JGR) Loading required package: rJava Loading required package: JavaGD Loading required package: iplots Note: On Mac OS X we strongly recommend using iplots from within JGR. Proceed at your own risk as iplots cannot resolve potential ev.loop

Hello: I´m trying to execute Apriori(file.arff) command of RWeka package. I´m working with: Operating System: Windows XP home R-2.4.0 RWeka_0.2-11 rJava_0.4-11 classpath= .;C:\Archivos de programa\Java\jdk1.5.0\lib;C:\Archivos de programa\R\R- 2.4.0\library\RWeka\jar An error occurs when .jnew command is executed, on class "weka/core/Instances" :

I am currently working on a code which clusters attributes from a data set, then uses a linear regression model to predict NA values in the data set. The code works for almost all cases, but then errors out on a case that seems like it should work the same. This is the line of code that is giving me the problem: NewClusterData[j,att] <- predict(cl,newdata =

Full_Name: Erik Lukac Version: R version 2.8.1 (2008-12-22) OS: Mac OS 10.5 Submission from: (NULL) (141.84.28.167) I tried to install JGR, but somehow it doesnt work. > install.packages("JGR") Warning in install.packages("JGR") : argument 'lib' is missing: using '/Users/erikl/R/i386-apple-darwin9.6.0-library/2.8' trying URL

Hi all - For those in the northern Virginia/DC area, there''s a Ruby user''s group meeting on Wednesday. Paul Stadig will give a presentation on connecting Ruby to Java with YAJB and Devin Mullins will present on the cross-platform GUI toolkit WxRuby. More details are here: http://novarug.org/ See you there! Yours, Tom

Hi, For those who might not be aware, rjb is a killer gem for using java classes inside your rails app (or any ruby code). Check it out at: http://rubyforge.org/projects/rjb/ I was able to successfully use it in one of my apps that required some code that is only available in java. And it''s much nicer than having to compile a java app, then shell out using backticks, get back the return

Folks, I'm a bit puzzled by the fact that if I generate 100,000 standard normal variates using rnorm() and perform the Jarque-Bera on the resulting vector, I get p-values that vary drastically from run to run. Is this expected? Surely the p-val should be close to 1 for each test? Are 100,000 variates sufficient for this test? Or is it that rnorm() is not a robust random number generator?

Heya all -- I recently downloaded the RJB 1.1.1 gem, and the install seemed to go fine. However, when I try to require ''rjb'' I get the following error: no such file to load -- rjb Has anyone seen this before? Any thoughts what it could be? Thanks so much! -Lucas -- Posted via http://www.ruby-forum.com/. --~--~---------~--~----~------------~-------~--~----~ You received this