Installation manual

To use RJDemetra you need Java 8 or higher. If you don't (or if your R session is wrongly configure) you will have an error loading RJDemetra since release 0.1.3.

To check which version Java version is used you can run the following code:

library(rJava)
.jinit()
.jcall("java/lang/System", "S", "getProperty", "java.runtime.version")

If you have Java 7 or lower and you can't update it (for example for security reasons) you can install a portable version of Java. There are several websites where you can download a portable version of Java, for example:

• Zulu JDK

• AdoptOpenJDK

• Amazon Corretto

• Oracle

If you use a 64-bit of R be sure to install a 64-bit version of Java. When the portable version is installed and unzip, you just need to use configure the environment variable JAVA_HOME before loading RJDemetra or rJava. Thus, if you already have loaded RJDemetra or rJava, you have to restart your R session. Suppose Java is installed in D:/Programs/jdk-21, you have several solution:

1. Configure the JAVA_HOME variable in your script (to be done each time you open R):

   Sys.setenv(JAVA_HOME='D:/Programs/jdk-21')
   

   And to check the value of the environment variable:

   Sys.getenv("JAVA_HOME")
   

2. Configure globally the JAVA_HOME variable (to be done once):

   a. Modify the JAVA_HOME in OS environment variables (in Windows, see for example https://confluence.atlassian.com/doc/setting-the-java_home-variable-in-windows-8895.html).

   b. If you use RStudio, modify the .Renviron: from R run the code file.edit("~/.Renviron"), add to the file the path to the portable version of Java as before (JAVA_HOME='D:/Programs/jdk-21'), save and run R again.

If you use a portable version and still have trouble installing the package you can try with the argument INSTALL_opts = "--no-multiarch":

# For CRAN release:
install.packages("RJDemetra", INSTALL_opts = "--no-multiarch")
# For development version:
devtools::install_github("jdemetra/rjdemetra", INSTALL_opts = "--no-multiarch")