[java-dev] working with JitterObjects in mxj that don't output jitter matrices

hi,
i'm trying to write a class for mxj that incorporates a JitterObject.

from the examples this seems to be straight forward for objects that  
process and output jitter matrices, like in the  
"javajitterfirsttest.pat" example, where jit.sobel and jit.brcosa are  
used with the "matrixcalc" message:

mybrcosa.matrixcalc(inname,mymatrix2);
etc.

but what about using a jitter object, which doesn't output a jitter  
matrix?

i'd like to find the mean value of a 2d 1 plane matrix using jit.3m e.g.

JitterObject my3m = new JitterObject("jit.3m");
my3m.matrixcalc(myInputMatrix, ???);


thanks for any pointers.
volker.