Intersection point of x axis
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How do i plot intersection point of a curve with x axis?
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Answers (1)
Star Strider
on 22 Nov 2020
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
.
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