I have a function that gives two outputs, what is the easiest way to use fzero on only the second output

I have a function [a,b] = fun(x) when I don't want to change the function. I want to find the value of x for which b returns zero. What is the simplest way to get fzero to work here? Currently my best option is to write a second function

function [b] = fun2(x)

[~,b] = fun(x); return

but there must be a better way.

[David H]

As others have commented, there is no good way of doing this within fzero.

Answer 1

[David H]

No good way of doing this within Fzero, people have made that clear.

Answer 2

[Matt J]

but there must be a better way.

Nope.

[Matt J]

However, your wrapper function fun2 doesn't need to reside in its own .m fle. It can be a nested function or a local function.

[Simona Giglioli]

how?

[Matt J]

How? Like any nested or anonymous function.

[Simona Giglioli]

But then if I use fzero in the main code, it doesn't recognise the function