MATLAB: Sum of Euclidean distances

sum

Hi.

There are 5 points in 3D space: xyz=rand(5,3).

How can I quickly calculate a sum of Euclidean distances from the 1st point till the rest of points (2nd-5th)?

Thanks.

Best Answer

diffs = bsxfun(@minus, xyz(2:end,:), xyz(1,:));
distance = sum(sqrt(sum(diffs.^2, 2)))

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sumZ = sum(Z)

MATLAB: Create multiple spheres at given coordinates using a for loop or function and function call

You can use this code:

xyz = [-8.67212090030965	-7.78294481282592	4.19809966191787
4.30363429770975	-6.33796132936349	2.30412196271579
11.4626419696253	3.31049523749869	2.84193335035400
1.28757516363600	6.20802478748340	11.1358580308193]
x1 = xyz(:, 1);
y1 = xyz(:, 2);
z1 = xyz(:, 3); 
SizeXYZ = size(xyz,1);
for i = 1:SizeXYZ
  [x,y,z] = createspheres(x1(i),y1(i),z1(i));
  surf(x,y,z);
  hold on
end
%
function [X,Y,Z] =createspheres(spherex, spherey, spherez)
[x, y, z] = sphere(20);
X= x+ spherex;
Y = y+ spherey;
Z = z+spherez;
%newroot
end

Best Answer

Related Solutions

MATLAB: How to calculate total hamming distance

MATLAB: Create multiple spheres at given coordinates using a for loop or function and function call

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