Call R from JAVA to get Chi-squared statistic and p-value

Question

I have two 4*4 matrices in JAVA, where one matrix holds observed counts and the other expected counts.

I need an automated way to calculate the p-value from the chi

Answer 1

I recommend to simply use a Java library that does a ChiSquare test for you. There are enough of them:

• Apache commons math: http://commons.apache.org/proper/commons-math/
• JSC: http://www.jsc.nildram.co.uk/
• JDistlib: http://jdistlib.sourceforge.net/

This is not a complete list, but what I found in 5 minutes searching.