Hi,

The question is more than one year old, but maybe the answer is interesting to others as well. One possible way is:

Matlab(['j41'=J[1,1],'j42'=J[1,2]]);

And so on. The advantage is that you can use a lot more types of expressions if you enclose them in single quotes and Maple does not isue the infamous "Warning, The following variable name replacements were made: ..."

For example:

Matlab(t,resultname="t(1)");       # Does not work

Matlab(['t(1)'=t]);                         # Works

Another option is to generate the Matlab-code using sequencies:

J:=Matrix(2,6);
seq(seq(Matlab(J[i,j], resultname = cat(VarName, convert(i, string),convert(j, string))), j = 1 .. Dimension(J)[2]),i=1 .. Dimension(J)[1]);

Here the output name is constructed by concatenation of strings.