有没有人成功地使用 JRI 和 rJava?我想在我的 Java 应用程序中放入一些用 R 制作的图表,但没有成功。任何人都可以提供工作示例。这是我发现的,但它不起作用。
import org.rosuda.JRI.REXP;
import org.rosuda.JRI.Rengine;
/**
* @author Nero
*In this file, I will try to plot a simple example, only to test how it?s possible to plot through java
*Attention: Nothing will work if you have not included the JRI.jar as library ( through properties)*/
public class TryPlot {
public static void main(String[] args) {
// TODO Auto-generated method stub
//start the Rengine (JRI)
Rengine re = new Rengine(null, false, null);
//in R: >a<- c(1.2,2.3,4.5) :
double da[] = {1.2, 2.3, 4.5};
long xp3 = re.rniPutDoubleArray(da);
re.rniAssign("a", xp3, 0);
//look up for a:
REXP x;
x = re.eval("a");
System.out.println(x);
//THE PROBLEM: The window opens, but nothing happens???
re.eval(" plot(a)");
}
}