Determining the length of a 3D spiral

I made a program to create a spiral but I don't know how to determine the length of it.

clear all
clc
dh=0.5; %step depth 
a=45;   %angle of inclination of cone 
h=30;   %depth of the cone 
R1=50;  %largest radius of the cone
D=R1*tand(a);
N=h/dh; %Number of loops or contour 
m=1;
for n=0:1:360*N %dividing a loop into 360 angles 
    Z(m)=0-((dh/360)*n);
    R=R1-(((dh/360)*n)/tand(a)); %radius at any depth
    X(m)=R*cosd(n);
    Y(m)=R*sind(n);
    m=m+1;
end
plot3(Y,X,Z,'y') %3d visualization of helix

Answer 1

[Image Analyst]

Did you try the Euclidean distance? Something like

deltaX = diff(X);
deltaY = diff(Y);
deltaZ = diff(Z);
distance = sum(sqrt(deltaX.^2 + deltaY.^2 + deltaZ.^2))

[Hassan Moheb Abdulrahman Yousef]

Thank you. Is the solution in [mm]? Because so far i have counted in mm.

[Image Analyst]

It's in whatever units your x, y, and z are in.

[Hassan Moheb Abdulrahman Yousef]

I am very grateful for your help.

[Image Analyst]

Did it solve it? If so, could you click the "Accept this answer" link? 🙂