How to display arc length of the line created on a line plot based on the input data

8 views (last 30 days)
Christopher Swain-Phipps
Christopher Swain-Phipps on 17 Jan 2022
Answered: _ on 17 Jan 2022
I am currently plotting a series of x and y co-ordinates using the plot(x,y) function in MATLAB which outputs a graph that looks something like this:
How do I go about displaying the arc length of the line created at points along the line assuming my first x and y data point is 0% and my last data point is 100%?
jessupj on 17 Jan 2022
i think you want something along the lines of the cumulative sum of the pythagorean distances between successive points on the curve, normalized by the final term.

Sign in to comment.

Accepted Answer

_ on 17 Jan 2022
% some x and y:
x = [10:-1:2 2:10];
y = [5+sqrt(x(1:end/2)) 5-sqrt(x(end/2+1:end))];
set(gca(),'XLim',[0 12]);
% calculate "normalized arc length":
dx = diff(x);
dy = diff(y);
ds = sqrt(dx.^2+dy.^2);
s = cumsum([0 ds]);
s = s/s(end);
% put a text at each x,y with value of s:
v_a = {'top','bottom'};
nx = numel(x);
for i = 1:nx

More Answers (0)

Community Treasure Hunt

Find the treasures in MATLAB Central and discover how the community can help you!

Start Hunting!