help using fzero to find the intersection
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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
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Answers (2)
Star Strider
on 29 May 2020
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
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