How do I create a matrix of symbolic function elements and also able to access the element in the matrix using row and column index?

I'd like to conduct matrix operation to symbolic functions. For instance, a row vector of symbolic functions times a column symbolic functions is the sum of product of symbolic functions. Also, I'd like yo access any element in this matrix and gets the corresponding symbolic element, how can I do this?

Answer 1

[Walter Roberson]

You will probably need to feval(symengine) to do this, so that you can slip into a programming language (MuPAD) which has a syntax that distinguishes between indexing and function evaluation.

Or you could compromise a little and invoke the functions to get symbolic expressions that can be multiplied, then symfun() the expressions back into symbolic functions. The results would differ if the functions have side effects, and you would lose the ability to use feval(symengine, 'op', ...) to probe the structure of the component expression.

[Shawn Miller]

If i don't want to go into MuPAD, do you mean I can use symbolic expressions and hence an array of symbolic expressions and conduct operations like numeric array and then use symfun(expression,var) to get back to function if I'd like to calculate for certain var values?

[Shawn Miller]

Seems I can use index to access the elements in a matrix of symbolic expressions.

[Walter Roberson]

Yup. Algebraic matrix multiplication "*" works fine on arrays of symbolic expressions, and you can index the array without difficulty.