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嗨,大家好 我想問一下,是否有人成功與JRI和rJava合作?我想把一些圖形,R中的圖形放到我的Java應用程序中,但沒有成功。任何人都可以提供工作示例。這是我發現的,但它不起作用。謝謝從R調用到Java應用程序
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)");
}
}