Why do I receive an error with FZERO on a vector-valued function in MATLAB?

I am trying to use FZERO on a vector valued function and I receive the following error:

ERROR: ??? Operands to the || and && operators must be convertible to logical scalar
values.

Error in ==> fzero at 449
while fb ~= 0 && a ~= b

Answer 1

[MathWorks Support Team]

This is not a bug in MATLAB with the FZERO function, but the expected behavior. Acoording to the documentation, FZERO only accepts handle to a scalar-valued function and finds its root.

One of the ways to find roots of a vector valued function is to pose it as a multi-objective optimization problem. Please refer to the following webpage for more information about minimizing multiple objective functions in MATLAB:

https://www.mathworks.com/discovery/multiobjective-optimization.html