Alright,
Here's a simple explanation and then a solution :
1. The (a,b) is the center co-ordinate of the circle.
2. The (x,y) is any point on the circumference of the circle.
3. r is the radius of the circle.
4. Each Point on Circle = r*cos(angle), r*sin(angle)
Now, the MATAB code is here :
%define a, b, x and y
a = 3;
b = 4;
x = 6;
y = 7;
% Now we will find radius
r = (x-a)^2 + (y-b)^2;
% Now we will create a vector of angle range from 0 to 2*pi
theta = 0 : 0.01 : 2*pi;
% Now we will find x-points and y-points
xp = r * cos (theta);
yp = r * sin (theta);
% now we will plot the circle
axis 'square'
plot (xp + a, yp + b)
And you are done :
Hope that this explanation is satisfactory. Please do rate my answer and accept as answer if it solved your problem :)
With Regards
Tushar Srivastava