![rJava & Java/R interface
Integrate
Two way native interface
- JNI: libjri
- or TCP to RServe
Rengine re = new Rengine(new String[] {}, false, null);
// wait until engine is ready
if (!re.waitForR()) {
throw new IllegalStateException(“Can’t load R engine”);
}
re.eval("data(cars)", false);
REXP cars = re.eval("cars");
RVector carsVector = cars.asVector();
// dissect carsVector...](https://image.slidesharecdn.com/datasciencewithrforjavadevs-130924151737-phpapp01/85/data-science-with-r-for-java-developers-35-320.jpg?cb=1380035959)
![Reimplementation of R on JVM
Share data:
Integer[] data = {1, 2, 3};
engine.put("data", data);
engine.eval("print(sum(data))");
Assimilate](https://image.slidesharecdn.com/datasciencewithrforjavadevs-130924151737-phpapp01/85/data-science-with-r-for-java-developers-38-320.jpg?cb=1380035959)
![Reimplementation of R on JVM
Share data:
import(com.foo.User)
# instantiate Java beans
tim <- User$new(name='Tim', age=23)
tom <- User$new(name='Tom', age=45)
# invoke setter
tim$name <- "Timmy"
Use Java from Renjin:
Integer[] data = {1, 2, 3};
engine.put("data", data);
engine.eval("print(sum(data))");
Assimilate](https://image.slidesharecdn.com/datasciencewithrforjavadevs-130924151737-phpapp01/85/data-science-with-r-for-java-developers-39-320.jpg?cb=1380035959)
Data Science with R for Java developers
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- 33. Agenda Data Science The R language Gimme some Java! 1 1 1 1 11 1 1 0 0 0 0 0 0
- 34. Bridging R and Java Integrate Assimilate Replace
- 35. rJava & Java/R interface Integrate Two way native interface - JNI: libjri - or TCP to RServe Rengine re = new Rengine(new String[] {}, false, null); // wait until engine is ready if (!re.waitForR()) { throw new IllegalStateException(“Can’t load R engine”); } re.eval("data(cars)", false); REXP cars = re.eval("cars"); RVector carsVector = cars.asVector(); // dissect carsVector...
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- 38. Reimplementation of R on JVM Share data: Integer[] data = {1, 2, 3}; engine.put("data", data); engine.eval("print(sum(data))"); Assimilate
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