Intersection point of x axis

How do i plot intersection point of a curve with x axis?

Answer 1

[Star Strider]

It depends on the curve and how you define it.

Example —

x = linspace(-5, 5);
y = x.^2-2;

zx = find(diff(sign(y)));
for k = 1:numel(zx)
    xint(k) = interp1(y(zx(k)+[-1 1]), x(zx(k)+[-1 1]), 0);
end

figure
plot(x, y)
hold on
plot(xint, zeros(size(xint)), 'p')
hold off
grid

.

[Steven]

This worked perfectly for my equation thank you

[Star Strider]

My pleasure!