What does this function actually do/use to get the outputs? rowfun wiith the table is probably the tool to use; in general the result of an operation with MATLAB on numeric NaN inputs is NaN output; you'll get that automagically without even trying. Similarly for char() data although I'd strongly recommend the cellstr or convert to categorical and then the <missing> indicator will also come along.
If there are cases where one variable is missing but not all in the given row and it's needed to have all inputs, then the all function will let you test for an array or logical tests for any of the needed variables will let you know about which are/are not valid records.
Just give 'er a go...come back with specific Q? when you run into a roadblock -- but then show us the code itself; we can't do anything with just the function definition line.
