How do I publish my question with the frenet function?

The question says to execute these lines of code, which will then prompt the user for values.

t=linspace(0,4*pi,101); 
x=@(t) cos(t);
y=@(t) sin(t);
z=@(t) t/(2*pi); plot3(x(t),y(t),z(t))
axis equal 
hold on 
frenet(x,y,z)

When I do this, I get the error : "Undefined function 'frenet' for input arguments of type 'function_handle'." Help please!

Answer 1

[Sean de Wolski]

which -all frenet

'frenet' not found.

On a full product install. You need to make sure that frenet.m is on the path and that the above returns a path.

[Sam]

how do i add it to the path?

[Sean de Wolski]

I would recommend using the path tool:

>>pathtool

Add the directory containing it.

[Sam]

what directory?

[Sean de Wolski]

Whatever directory has frenet.m. Like I said, I've never heard of it.

[Walter Roberson]

Is it the one from the file exchange, http://www.mathworks.com/matlabcentral/fileexchange/11169-frenet ? If so then download that, unzip it into a directory, and put that directory onto your MATLAB path.