how to divise an image on 2d to 6 segments with matrix rotation ?

heyy, i want to divise an image with matrix rotation to 6 segments (theta=60degrees),the point is to incrimente a new segment with the last segment (by theta=theta+pi/3).can u help me please

x = 1:5;
y = 1:5;

v = [x;y];

x_center = x(3);
y_center = y(3);

center = repmat([x_center; y_center], 1, length(x));

theta = pi/3;   
mod(theta,360)
R = [cos(theta) -sin(theta); sin(theta) cos(theta)];

s = v - center;     
so = R*s;           
vo = so + center;   

x_rotated = vo(1,:);
y_rotated = vo(2,:);

plot(x, y, 'k-', x_rotated, y_rotated, 'r-', x_center, y_center, 'bo');
axis equal
x_rotated = 1:5;
y_rotated = 1:5;

v1 = [x_rotated;y_rotated];

x1_center = x_rotated(3);
y1_center = y_rotated(3);

center1 = repmat([x1_center; y1_center], 1, length(x_rotated));
theta1=theta+pi/3;
R1 = [cos(theta1) -sin(theta1); sin(theta1) cos(theta1)];
s1 = v1 - center1;     
so1 = R1*s1;           
vo1 = so1 + center1;   

   x1_rotated = vo1(1,:);
   y1_rotated = vo1(2,:);

plot(x_rotated, y_rotated, 'k-', x1_rotated, y1_rotated, 'b-', x1_center, y1_center, 'bo');
axis equal

the problem in my code that he couldn't show the first segment with 60degrees,it shows only the last one with 120degrees

[DGM]

See also:

https://www.mathworks.com/matlabcentral/answers/411306-how-to-divise-an-image-with-matrix-rotation-same-angle

Answer 1

[Guillaume]

Use hold on after your first plot to stop new plots overwriting previous ones.

Note that you should isolate your rotating matrix code into its own function or use a for loop instead of duplicating it.

Also note that since R2016b, you don't need to repmat your centre vector and prior to R2016b bsxfun is faster than repmat.

[Asma Rahmani]

thank you sir,i want to divise the image in 6segments(theta=60degrees) with the code which i have recently sent,i didn't how it works,how i can i read my image and enter my last code