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How to get the length of a spline in Matlab (cscvn)

How to get the length of a spline in Matlab (cscvn)

How to get the length of a spline in Matlab (cscvn)


i'm searching for a method do get the length of a spline in 3D.

I'm refering to a closed thread (thread575-207328: how to measure the length of curve with Matlab?).
The member "cibachrome" wrote:
"The Spline Toolbox contains a function CSCVN that will hand you the total length as the last value of the arc sequence."

Can you tell me which arc sequence have been talked about?
I looked at the "breaks" parameter of the spline-object (created with cscvn) which contains as many values as given points.
But the last value can not be the total length of my spline.

Anbody can help me?


RE: How to get the length of a spline in Matlab (cscvn)

Well, to be honest the help, and a quick experiment, don't agree with cibachrome.

So if you had a matrix of x y and (perhaps) z coordinates how would you find the total length of the vector?



Greg Locock

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RE: How to get the length of a spline in Matlab (cscvn)

Hey Greg,

Thanks for your answer!
I found another approximating solution:
I'm interpolating between the points, for example with square interpolation.
I connect the sampled points and the n interpolated points.
The length of my spline is the accumulated length of the parts.


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