Inscribed n-gon of unit circle.

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Jim Oste
Jim Oste 2015-2-10
回答： Image Analyst 2015-2-10
I was given the following code to determine the length of a polygonal curve
function [ len ] = ost_len( x,y )
%Length of polygonal curve.
% This function computes the length of the polygonal curve whos ith
% ith vertex has Cartesian coordinates x(i) and y(i)
x = rand(1, 5);
y = rand(1, 5);
dx = abs([diff(x), x(end)-x(1)]);
dy = abs([diff(y), y(end)-y(1)]);
dist = sqrt(dx.^2 + dy.^2);
len = sum(dist);
disp(len)
end
I am now somehow supposed to calculate the length of an inscribed n-gon for a unit circle for n=2^i, where i = 2,3,...,8.
Would the function given help me or do I need to alter it?

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Image Analyst
Image Analyst 2015-2-10
Well obviously for an inscribed n-gon, you wouldn't want to use random x and y so get rid of those lines. Those were just sample data that were created. You have to replace it with points on the unit circle. I assume you know how to use sin() and cos() so this will be no problem for you.

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