find the inflection point of a curve 3D (set of nodes) in matlab

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Alberto Acri
Alberto Acri 2024-6-3
编辑： Matt J 2024-6-4
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How can I determine the inflection point of a set of nodes generating a curve in 3D space?
load curve_1.mat
curve_x = curve_1;
figure
plot3(curve_x(:,1),curve_x(:,2),curve_x(:,3),'k.','Markersize',10)
hold on
plot3(curve_x(:,1),curve_x(:,2),curve_x(:,3),'-r','LineWidth',2)
hold off
grid off
axis equal
Before determining the inflection points, is it possible to make the curve ‘curve_x’ smoother (more like a curve) since the nodes are not placed at a certain distance from each other?

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采纳的回答

Matt J
Matt J 2024-6-3
You can use csaps to fit a smoothing spline to the points and then fnder to differentiate the curve and observe curvature changes.
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Alberto Acri
Alberto Acri 2024-6-4
Thank you but I could not find a solution. Isn't there a code I can try to use for this case?

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