[R] Using Java methods in R

hill0093 hill0093 at umn.edu
Mon Apr 25 02:06:51 CEST 2011

I added this R code to the bottom of the previous code and it doesn't work

> ar34Ret <- .jcall(qsLin,returnSig="[[D","arReturnTEST")
> print(ar34Ret,digits=20)
[1] "Java-Array-Object[D:[D at 8813f2"

[1] "Java-Array-Object[D:[D at 1d58aae"

[1] "Java-Array-Object[D:[D at 83cc67"

> for(i in 1:3) for(j in 1:4) print(ar34Ret(i,j),digits=15)
Error in print(ar34Ret(i, j), digits = 15) : 
  could not find function "ar34Ret"

The Java code is:
public final static double[][] arReturnTEST() { 
  double[][]retArr=new double[3][4]; for(int i=0;i<3;i++)for(int
j=0;j<4;j++)retArr[i][j]=i*1000+j; return(retArr); 
R doesn't know how to print the array in the next to final line,
and thinks the array is a function in the final line.

Any suggestions?

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