MATLAB: How to calculate distance between two ginput

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hai friends i have to calculate distance between two ginput points and also how to calculate angle between 4 ginput.

how to calculate its length?

And how to calculate angle for this ?

Best Answer

%%distance  
[x,y]=ginput(2)
  len=sqrt((y(2)-y(1))^2+(x(2)-x(1))^2)
%%angle
[x,y]=ginput(4);angle=zeros(1,floor(length(x)/2));
for i=1:floor(length(x)/2)
    angle(i)=atan((y(i+2)-y(i+1))/(x(i+2)-x(i+1)));
end

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See my spatial calibration demo, attached. Let me know if you still have questions after that.

MATLAB: How to calculate integral along the boundary of closed curve

Provided than (x,y) points are very dense you can approximate the area you ask, good enough:

clear; clc;
% generation of input data
t=0:0.01:2*pi-0.01;
x=4*cos(t); 
y=2*sin(t);
z=sqrt(abs(x))+y.^2+exp(0.6*x);
stem3(x,y,z,'-b'); hold on;
plot3(x,y,0*z,'-k.'); hold on;
plot3(x,y,z,'r*');
xlabel('x'); ylabel('y'); zlabel('z');
% calculation of area (approximately)
A=0;
for n=1:length(x)-1
    A= A+ sqrt( (x(n+1)-x(n))^2 + (y(n+1)-y(n))^2 ) * (z(n)+z(n+1))/2 ;
end
fprintf('Area is %f \n', A)

If you run this script, you will receive something like this:

Best Answer

Related Solutions

MATLAB: How to calculate length (y-axis in cm) and width (x-axis in cm) of rectangle in an image

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