plotting line function in 3D

t = linspace(0, 4*pi);
x = @(t)(4+sin(a*t))*cos(3*t);
y = @(t) (4+sin(a*t))*sin(3*t);
z = @(t) cos(3*t);

How is it possible to plot this function?

Answer 1

[Star Strider]

I had to supply a value for ‘a’, assuming it is a scalar.

This works:

t = linspace(0, 4*pi);
a = 1;                                                      % Guess The Value Of ‘a’
x = @(t)(4+sin(a*t)).*cos(3*t);
y = @(t) (4+sin(a*t)).*sin(3*t);
z = @(t) cos(3*t);

figure(1)
plot3(x(t), y(t), z(t))
grid on

You need to vectorize your functions to do element-wise operations (replacing ‘*’ with ‘.*’). See the documentation on Array vs. Matrix Operations for details.

[Jente Marien]

Forgot to mention a = 62

Thanks!

[Star Strider]

Since ‘a’ is a scalar, this will work.

My pleasure!