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When I type require(xlsx) in order to load the package xlsx in R, the following messages is shown:
> require(xlsx) Loading required package: xlsx Loading required package: xlsxjars Loading required package: rJava Error : .onLoad failed in loadNamespace() for 'rJava', details: call: fun(libname, pkgname) error: JAVA_HOME cannot be determined from the Registry Failed with error: ‘package ‘rJava’ could not be loaded’ I've also tried to load the rJava package manually but got this error message:
require(rJava) Loading required package: rJava Error : .onLoad failed in loadNamespace() for 'rJava', details: call: fun(libname, pkgname) error: No CurrentVersion entry in Software/JavaSoft registry! Try re-installing Java and make sure R and Java have matching architectures. Do you have any suggestion on how to solve the problem?
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rJava provides a low-level bridge between R and Java (via JNI). It allows to create objects, call methods and access fields of Java objects from R. rJava release versions can be obtained from CRAN - usually install. packages("rJava") in R will do the trick.
rJava is a JNI (Java Native Interface)-based, R-to-Java interface with which Java objects may be created and Java methods called and Java fields accessed from R. In this tutorial, we shall get started with using the rJava R package to use Java from R. This tutorial has the following sections: Setting the Environment.
The reason is probably linked to the fact you are using a 64-bit OS and R version but do not have Java installed with the same architecture. What you have to do is to download Java 64-bit from this page: https://www.java.com/en/download/manual.jsp
After that just try to reload the xlsx package. You shouldn't need to re-start R.
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