Could you guys explain me how to get a value back in a case like this...?

    I Have a line in a program

    P0=fzero(@(P0) estimateSurfacePressure(P0,false,extPar), [1 25]);

and inside estimateSurfacePressure I have 

function [Ps,Rs]=estimateSurfacePressure(P0,isCompressed,extPar)

but inside this file I modify extPar... (extPar is a structure). 

I thought that putting extPar in function [Ps,Rs,extPar] = ....Pressure(P0,isCompressed,extPar)
and modifying P0 to [P0,~,~,~,extPar] = fzero(.........) would give me extPar modified the way I want it to. But it doesn`t! How should I set this up so it gives me extPar not how it came in but how it should be after being modified in estimateSurfacePressure.m

Thank you!

Answer 1

[Dishant Arora]

Make use of global variables or see assignin