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Evaluating the angle between two vectors in space | Matlab Examples

Posted on November 2, 2018February 20, 2019 by Yılmaz Cemalettin

Matlab Tutorials | Examples

Practice 1:

Write a MATLAB program that will evaluate the angle between two given input vectors in space.

Solution:

Evaluating the angle between two vectors in space
MATLAB
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% Start to inputs from keyboard
 
Px = input('Enter P(x)');
Py = input('Enter P(y)');
Pz = input('Enter P(z)');
Qx = input('Enter Q(x)');
Qy = input('Enter Q(y)');
Qz = input('Enter Q(z)');
%End of the inputs
 
%Calculate lengths of vectors
 
Plenght = ((Px^2)+(Py^2)+(Pz^2))^(1/2);
Qlenght = ((Qx^2)+(Qy^2)+(Qz^2))^(1/2);
%Calculate dot scalar of the vectors
 
PQ = (Px*Qx) + (Py*Qy) + (Pz*Qz);
%Calculate the angle of two vectors
 
Radian = acos(PQ/(Plenght*Qlenght));
%Convert angle to degrees
 
Angle = Radian*180/pi;
%Print angle with specific fraction
 
fprintf('The angle between P and Q is %.4f degrees.\n',Angle);
%More smaller code in bellow comments
 
%-----------------------------------------------%
 
% fprintf('The angle between P and Q is %.4f degrees.\n',acos(((Px*Qx) + (Py*Qy) + (Pz*Qz))/(((Px^2)+(Py^2)+(Pz^2))^(1/2)*((Qx^2)+(Qy^2)+(Qz^2))^(1/2)))*180/pi);

 

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