help using fzero to find the intersection

i basically want to use fzero in order to find the coordinates of intersection between 2 graphs plotted together on the same figure can someone please explain how this is carried out

Answer 1

[KSSV]

Try this:

https://in.mathworks.com/matlabcentral/fileexchange/22441-curve-intersections?focused=5165138&tab=function

[Ziad Badreldeen]

the question requires we use the fzero function for the problem

[KSSV]

so attach your data..to find out whether fzero helps.

Answer 2

[Star Strider]

At the intersections, the difference between the functions is 0, and since fzero is a root-finding algorithm, choose and appropriate starting poiint and use it to find the intersections:

f = @(x) x.^2 - 2;
g = @(x) sin(2*pi*x/10);

for k = 1:2
    xint(k) = fzero(@(x)f(x)-g(x), 5*(-1)^k);       % Calculate ‘x’ At The Intersections
end

x = linspace(-2, 2);
figure
plot(x, f(x),    x, g(x))
hold on
plot(xint, f(xint), 'gp')                           % Choose Either Function To Plot The Intersections
hold off
grid

Also, see the documentation on Anonymous Functions to understand how this code works.