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We are working on a complex statistical project on Java. We did the original code in the R programming language. Is there a way to convert this code to Java code (converter) or otherwise how can we use R in a Java project?
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R is one of the most commonly used software packages for statistical computing and graphics and Java is the most commonly used programming language. 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.
Using it from Java is as simple as: Context context = Context. newBuilder("R"). allowAllAccess(true).
'\r' is the representation of the special character CR (carriage return), it moves the cursor to the beginning of the line. '\n'(line feed) moves the cursor to the next line . On windows both are combined as \r\n to indicate an end of line (ie, move the cursor to the beginning of the next line).
R packages are a collection of R functions, complied code and sample data. They are stored under a directory called "library" in the R environment. By default, R installs a set of packages during installation.
While I'm unaware of a 'converter', there is an interface called rJava which will allow you to run R code directly from Java.
http://www.rforge.net/rJava/
rJava is a simple R-to-Java interface. It is comparable to the .C/.Call C interface. 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.
In a sense the inverse of rJava is JRI (Java/R Interface) which provides the opposite direction - calling R from Java. JRI is now shipped as a part of the rJava package, although it still can be used as a separate entity (especially for development). Currently rJava is used as a part of JGR, iPlots and JavaGD software/packages.
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