how do i make this function accept vector values ?

hi , i have this function of the quadratic formula and i have had trouble getting it to accept vector values ?

function [ Root] = Quadratic( a, b ,c , plusOrMinus )
%UNTITLED6 Summary of this function goes here
%   inputs coeffecients
  if ((b^2)-4.*(a).*(c)) > 0
Num = -b +(plusOrMinus)* sqrt((b.^2)-(4.* a.* c));
denom = 2.*(a);
Root = Num/denom;
else 
    error(' the coeffecients yield a complex root')

end

Answer 1

[James Tursa]

Assuming you want to yield an error if any of the values yield complex roots, e.g.,

function [ Root] = Quadratic( a, b ,c , plusOrMinus )
%UNTITLED6 Summary of this function goes here
%   inputs coeffecients
% Khaled Almutairi, u1055414, ME EN 1010, HW2
if all( (b.^2)-4.*(a).*(c)) >= 0 )
    Num = -b +(plusOrMinus).* sqrt((b.^2)-(4.* a.* c));
    denom = 2.*(a);
    Root = Num./denom;
else 
    error(' the coeffecients yield a complex root')
end

However, it is not clear to me what plusOrMinus is and whether that will work with vectors or not. Maybe you could clarify what this is. Simply a +1 or -1 input?

[khaled almutairi]

yes , it is a +1 or -1 input in order to calculate either the negative or positive root