Plot a polygon without intersection

Hi everyone I have the matrix below and 1st row refers x-coordinates and 2nd row refers y-coordinates. When I plot it, I get the polygon that I do not want with several intersections due to array of the elements in the out matrix. You can see in the figure below. So, How can I arrange of the elements' array of this matrix to get smooth polygon. For example, the points should be in this aray (1,4) , (2,4) , (3,4) , (3,5) , (2,5) , (1,5). of course, the first point can be changed.

out = [  1     1     2     2     3     3;
         4     5     4     5     4     5]
pgon = polyshape([out(1,:)], [out(2,:)]);
plot(pgon)
grid on

Answer 1

[Walter Roberson]

k = boundary(out.');
plot(out(1,k), out(2,k))

... but it will just look like a square.

[skinny pete]

Thank you for your interest. Your answer inspired me to use boundary elements of the matrix. So I changed my code like below.

pgon = polyshape([max(out(1,:)),max(out(1,:)),min(out(1,:)),min(out(1,:))], [min(out(2,:)),max(out(2,:)),max(out(2,:)),min(out(2,:))]);
plot(pgon)
grid on