rJava | R to Java interface

by s-u Java Version: Current License: No License

X-Ray Key Features Code Snippets Community Discussions(10)Vulnerabilities Install Support

kandi X-RAY | rJava Summary

rJava is a Java library typically used in Utilities, JavaFX applications. rJava has no bugs, it has no vulnerabilities and it has low support. However rJava build file is not available. You can download it from GitHub.

R/Java interface allowing the use of Java from R as well as embedding R into Java (via JRI). Please visit the main rJava project page on RForge.net for details.

Support

Quality

Security

License

Reuse

Support

rJava has a low active ecosystem.

It has 217 star(s) with 79 fork(s). There are 23 watchers for this library.

It had no major release in the last 6 months.

There are 8 open issues and 260 have been closed. On average issues are closed in 274 days. There are 7 open pull requests and 0 closed requests.

It has a neutral sentiment in the developer community.

The latest version of rJava is current.

Quality

rJava has 0 bugs and 0 code smells.

Security

rJava has no vulnerabilities reported, and its dependent libraries have no vulnerabilities reported.

rJava code analysis shows 0 unresolved vulnerabilities.

There are 0 security hotspots that need review.

License

rJava does not have a standard license declared.

Check the repository for any license declaration and review the terms closely.

Without a license, all rights are reserved, and you cannot use the library in your applications.

Reuse

rJava releases are not available. You will need to build from source code and install.

rJava has no build file. You will be need to create the build yourself to build the component from source.

Installation instructions, examples and code snippets are available.

rJava saves you 3517 person hours of effort in developing the same functionality from scratch.

It has 7923 lines of code, 668 functions and 43 files.

It has high code complexity. Code complexity directly impacts maintainability of the code.

Top functions reviewed by kandi - BETA

kandi has reviewed rJava and discovered the below as its top functions. This is intended to give you an instant insight into rJava implemented functionality, and help decide if they suit your requirements.

Returns a string representation of this Xiterator .
Bootstrap JRI .
Finds the native library with the given filename .
Get a Constructor from an Object class
Lookup a class .
The main loop .
Returns a range of an array .
Returns an array that contains only unique values in the given array .
Get next element .
only called once

Get all kandi verified functions for this library.

rJava Key Features

No Key Features are available at this moment for rJava.

rJava Examples and Code Snippets

No Code Snippets are available at this moment for rJava.

Community Discussions

Trending Discussions on rJava

Unable to install XML R package in Docker image due to missing R_HOME var

Defining plugin goal at phase

Using parallel alongside rJava and xlsx

Save dplyr query to different schema in dbplyr

R: command not found

Venn Diagrams with `venneuler` in `R`: delete the name of the set from the plot and add elements name

rJava "EXTPR_PTR" procedure entry point not found in library

Cannot install rJava on Big Sur

R to SQL Server Connection via JDBC - wrong version of driver

How do I install rJava properly on MX Linux

QUESTION

Unable to install XML R package in Docker image due to missing R_HOME var

Asked 2022-Jan-19 at 02:44

I had a docker image that was building successfully for months. However, since Dec 17th I've run into the error shown in the Jenkins console output below. Nothing has changed in the dockerfile so it's clearly something to do with the underlying environment, I have a Jenkins server running on AWS EC2. The strange thing is all the other packages are installing fine without any reference to R_HOME, it's just the XML package install that's failing

I've tried explicitly setting R_HOME in the dockerfile as per this thread but no luck.

...

ANSWER

Answered 2022-Jan-19 at 02:44

In my case I tracked the issue down to test -x not working. The /usr/bin/R script uses that to check if the /usr/lib/R folder exists.

Searching for solutions to this sent me to various bug reports in Ubuntu but I managed to resolve the issue by upgrading docker version. My Docker host is Centos not Ubuntu like in most bug reports, however my container is based on Ubuntu.

Things worked again after upgrading Docker to the following packages:

Source https://stackoverflow.com/questions/70432911

QUESTION

Defining plugin goal at phase

Asked 2021-Nov-14 at 16:40

I am trying to define a plugin goal so that it can automatically be executed at a particular phase; say for example the test phase. But I am unable to achieve that. For example I coded the following pom.xml. Notice in my XML element, I have a sub-element which is "test". I can execute my goal using the command "mvn antrun:run@ant-echo"; but "mvn test" does not execute that goal. I am using Maven version 3.8.3 and my JDK version is 16.

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ANSWER

Answered 2021-Nov-14 at 16:40

In order to have your plugin executed during the configured lifecycle phase, you have to specify the plugin goal binding and configuration within the section:

Source https://stackoverflow.com/questions/69960488

QUESTION

Using parallel alongside rJava and xlsx

Asked 2021-Jul-12 at 18:34

I have a huge excel file to manipulate. I need to read colors and styles of a big number of cells and thought to speed up calculations by parallelising tasks. I'm relying on the xlsx package and its function getCellStyle to grab the style cell by cell. That package, in turn, relies on rJava. It looks like that, for some reason, tasks involving java objects can not be parallelised. Here a reproducible example:

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ANSWER

Answered 2021-Jul-07 at 14:00

TLDR: I think initializing the wb inside the foreach loop should solve your problem.

The parallel package in R handles parallel processing in a rather simplistic way: it launches several instances of R, copies the necessary data into each instance, runs your code and then returns your result.

The problem I suspect you are running into is that R doesn't really know how to copy rJava objects into a new instance of R.

Source https://stackoverflow.com/questions/68256836

QUESTION

Save dplyr query to different schema in dbplyr

Asked 2021-May-17 at 21:36

I have a JDBC connection and would like to query data from one schema and save to another

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ANSWER

Answered 2021-May-17 at 21:36

I do this using dbExecute from the DBI package.

The key idea is to extract the query that defines the current remote table and make this a sub-query in a larger SQL query that writes the table. This requires that (1) the schema exists, (2) you have permission to write new tables, and (3) you know the correct SQL syntax.

Doing this directly might look like:

Source https://stackoverflow.com/questions/67575456

QUESTION

R: command not found

Asked 2021-May-09 at 02:29

I want to install rJava but this fails with the following suggestion:

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ANSWER

Answered 2021-May-07 at 12:38

Find the location of R and Rscript on your disk by running R.home() on Rstudio's R console. Then, follow this guide and copy the returned location from R.home() and paste on a new line on /etc/paths.

Then, restart the terminal and run R CMD javareconf

Source https://stackoverflow.com/questions/67324807

QUESTION

Venn Diagrams with `venneuler` in `R`: delete the name of the set from the plot and add elements name

Asked 2021-Feb-03 at 16:46

For the past few days I have been trying to figure out how to draw a Venn diagram from an arbitrary number of sets and came across the R package venneuler. This code:

...

ANSWER

Answered 2021-Feb-03 at 16:46

You could directly modify v$labels:

Source https://stackoverflow.com/questions/65994218

QUESTION

rJava "EXTPR_PTR" procedure entry point not found in library

Asked 2020-Dec-17 at 16:45

I'm attempting to install rJava as to use the package tabulizer. My steps so far has been to rund install.packages("rJava"), run Sys.setenv(JAVA_HOME="C:/Program Files/Java/jdk-15.0.1"), and then run library(rJava). When running the last command I first get a pop-up showing EXTPTR_PTR Entry Point for procedure not found (based on my hopeful translation), and then in console:

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ANSWER

Answered 2020-Dec-17 at 16:45

There was accidental breakage introduced by R 4.0.0 or R 4.0.1 which was fixed in R 4.0.2 and R 4.0.3. Are you by chance running 4.0.1? Upgrading would help.

The official word from one R Core member is to not use EXTPTR_PTR (see e.g. this list email). The current CRAN version of rJava should also be fine.

So in short: 'current' rJava with 'current' R should be fine.

Source https://stackoverflow.com/questions/65332183

QUESTION

Cannot install rJava on Big Sur

Asked 2020-Dec-14 at 22:01

In the following environment:

Mac OS: Big Sur
R: version 4.0.3
Java: java version "1.8.0_271"

I am trying to run:

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ANSWER

Answered 2020-Dec-14 at 22:01

JRI is currently not supported on Big Sur, because Apple has removed the last traces of Java support - here the JavaVM framework, so you have two options:

use --disable-jri when installing rJava from sources (e.g. via install.packages("rJava", configure.args="--disable-jri"))
use rJava from CRAN (i.e., install the binary version of rJava - not source)

The issue tracking this is #248

Source https://stackoverflow.com/questions/65278552

QUESTION

R to SQL Server Connection via JDBC - wrong version of driver

Asked 2020-Nov-04 at 20:12

I'm trying to connect to SQL Server via JDBC (yes, I know ODBC is better, but I'd need to make changes to the server security do to that).

...

ANSWER

Answered 2020-Nov-04 at 20:12

The problem is that you have Java 8 installed on your machine, but Driver was build for java 14 (class file version 58.0 tells that).

You can either install java 14 on your machine or get a JDBC driver for Java 8.

A link for SQL Server JDBC driver for java 8

Source https://stackoverflow.com/questions/64686848

QUESTION

How do I install rJava properly on MX Linux

Asked 2020-Sep-18 at 21:13

I am trying to install rJava, as it's a dependency of OpenStreetMap (I want to create some maps).

However, when trying to install, I get the following error:

...

ANSWER

Answered 2020-Sep-18 at 21:13

apt install   libpcre2-8-0 libpcre2-dev

Source https://stackoverflow.com/questions/63962021

Community Discussions, Code Snippets contain sources that include Stack Exchange Network

Vulnerabilities

No vulnerabilities reported

Install rJava

Recommended installation of the CRAN version is via. in R. If you have all tools (and knowledge) necessary to compile R packages from sources, you can install the latest development version with. The RForge.net repository is updated automatically on each commit. On macOS/Windows you may need to add type='source'. IMPORTANT: You must have Java installed and it must be of the same architecture as the R you are using. See below for some troubleshooting help.

Support

Rule #1: do not set JAVA_HOME unless you are an expert. rJava attempts to find the correct settings automatically on most platforms, so setting JAVA_HOME incorrecty will just break things.

Find more information at: