Is there a function to turn ?x2 matrix of coordinates of vertices of a polygon into a ?x4 matrix of coordinates of line segments of that polygon?

Is there a function to turn a matrix of vertices of a polygon like this [2, 4; 5, 6; 6, 6; 8,5] into a matrix of line segments of that polygon like this [2, 4, 5, 6; 5, 6, 6, 6; 6, 6, 8, 5; 8, 5, 2, 4]?

Answer 1

[Stephan]

Yes,

circshift will do the job:

A = [2, 4; 5, 6; 6, 6; 8,5]
B = [2, 4, 5, 6; 5, 6, 6, 6; 6, 6, 8, 5; 8, 5, 2, 4]

% The solution:
C = [A circshift(A,-1)]

% The test:

A =

     2     4
     5     6
     6     6
     8     5


B =

     2     4     5     6
     5     6     6     6
     6     6     8     5
     8     5     2     4


C =

     2     4     5     6
     5     6     6     6
     6     6     8     5
     8     5     2     4

[Bartlomiej Krol]

Thank you. That is what I was looking for!