Hello,

I have a series of x,y,z data points and would like to create a 3d curve (quadratic) plot
then calculate the curvature of this whole curve.

Can anyone offer some assistance with this.

Thanks

Sumon

As far as displaying a parametric curve in 3D, probably plot3 is your best bet.

Here is an expression for local curvature in 3D:

http://en.wikipedia.org/wiki/Curvature#Local_expressions_2

You can compute this numerically with finite differences or if you know x(t),y(t),z(t) exactly, then you can write a closed form expression for kappa(t).

hth,

Greg

"Mr. Sumon" wrote in message <ifrn2h$ip4$1@fred.mathworks.com>...
> Hello,
> 
> I have a series of x,y,z data points and would like to create a 3d curve (quadratic) plot
> then calculate the curvature of this whole curve.
> 
> Can anyone offer some assistance with this.
> 
> Thanks
> 
> Sumon