we are currently making questions in Stack for students of mechanical engineering.
We let the students type the system equations for static mechanical problems into matrix cells. (6x6 for 3D Problems).
A lot of those cells need to be zero tho. to make it easyier to type, we’d like to fill all empty cells with zeros or at least fill all the cells with zeros from the beginning.
i cant seem to find the answer for this problem. we tried to substitute the „empty“ cell with zeros. but we cannot get the variable of the empty cell to tell maxima to substitute it with zero.
can anyone help with that?