This function is not yet fully documented. This is a transcript of the text-formatted help.

bbprod  Form a product of black-box matrices and scalars.
   BB=bbprod(A1,A2,...) creates a black-box operator
   equivalent to the product A1*A2*...

   If the matrices are normal matrices they will
   be converted to blackbox operators.

   To multiply operators already in blackbox form you
   may simply use A1*A2*... instead.