jri

I am very new to R, so please pardon me if this is a very very basic question. I have written an R script, which does some calculations and at the end plots Box Plot. If I run this script from the R console, it runs fine and graph is plotted. If I run the script from the Java program (the sample rtest.java program which is given on the JRI site), the calculations are done fine. But there is some problem with plotting the graph. The frame window opens and remains busy and hangs. (If I try to click on the window, it shows 'Not Responding'.) I am using JRI. This is how I am plotting the graph in

I have followed guides on the web and looked at questions on stackoverflow but I am still not able to set up JRI on Windows. Here are the steps I have taken: 1) Install R 2) Execute install.packages("rJava") in R to install rJava 3) Create a R_HOME system variable with value C:\Program Files\R\R-3.1.2 4) Add the following to my PATH variable: C:\Program Files\R\R-3.1.2\bin\x64;C:\Users\USERNAME\Documents\R\win-library\3.1\rJava\jri\x64 5) Added the JRI.jar (located in C:\Users\USERNAME\Documents\R\win-library\3.1\rJava\jri ) as a dependency in IntelliJ 6) Set the VM options in IntelliJ to

I'm using JRI to generate ggplot2 plots from Java. Currently I have to write plots to disk. How do I do this without going through files, i.e. just rendering the plots in memory? I tried using the Cairo package to plot to a textConnection, but that doesn't work without the "R Connections Patch," which after some Googling turns out to be ancient history. Mostly from https://stat.ethz.ch/pipermail/r-devel/2010-August/058253.html . library(Cairo) library(png) library(ggplot2) Cairo(file='/dev/null') qplot(rnorm(5000)) # your plot # hidden stuff in Cairo i = Cairo:::.image(dev.cur()) r = Cairo:::

I am trying to setup the Java/R interface (bundled in the R "rJava" package), but I am having some trouble (despite trying many suggestions here and on other forums). I am running Windows 7, jdk1.7.0_05, Eclipse, R 2.15.2. These are all 64 bit installations. The steps I have followed to attempt to get the example running are as follows: Install rJava within the R GUI: install.packages('rJava') - installs to C:\Users\USERNAME\Documents\R\win-library\2.15\rJava\ Setup environment variables: R_HOME = "C:\Program Files\R\R-2.15.2", additions to PATH = "C:\Program Files\Java\jdk1.7.0_05\bin";"C:

0 前言 R是一种非常方便易用的绘图、统计分析、ML算法设计方面的脚本语言。实际中有这样一种场景：算法工程师用R搭建了机器学习算法模型，想用于javaweb之中但是又不想重新用java写一遍算法模型，那么可以考虑java程序中直接调用R的脚本。JAVA负责系统的构建，R用来做运算引擎，从而实现应用型和分析性相结合的系统。 本文将搞清楚如下几个问题： 1）java调用R的方式有哪些及每种方式如何使用？ 2）这些调用方式的有哪些优缺点？ 下面开始。 1 java调用R的两种方式 1.1 远程调用模式（使用Rserve） Rserve是一个基于TCP/IP的服务器，通过二进制协议传输数据，可以提供远程连接，使得客户端语言能够调用R。 　　Rserve作为一个package发布在CRAN上，在服务端计算机安装R之后可以直接使用install.packages(“Rserve”)进行安装。需要使用时在R控制台下加载该包，然后输入命令Rserve()，开启服务器就可以供客户端调用。 　　首先建立一个新的连接，然后就可以使用eval之类的方法将R中的表达式传到服务器端，通过R求值后传回JAVA中REXP类型的变量，然后打印出来，整个过程非常简单。由于不需要对R进行初始化，因此速度会比较快。在linux等其他系统下可以同时建立多个连接，但是在Windows下只允许同时打开一个连接