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How to draw in MATLAB

I used the function ‘getline’ to get the points from the user. Using plot function the lines are drawn.

MATLAB CODE:
scz=get(0,'ScreenSize');

fig=figure('Position',[round(scz(1,3)/4) round(scz(1,4)/8) 700 500],'MenuBar','None','NumberTitle','off','Name','Draw Lines','Resize','off');



[x, y] = getline(fig);
plot(x,y);
axis([0 1 0 1]);

Draw lines
                    
To draw a rectangle:

x=zeros([1 5]);
y=zeros([1 5]);

r=getrect(fig);
x(:)=r(1);
y(:)=r(2);
x(2:3)=r(1)+r(3);
y(3:4)=r(2)+r(4);



plot(x,y);
axis([0 1 0 1]);

Draw Rectangle

The function ‘getrect’ returns the [xmin ymin width height].
We need 4 points to draw a rectangle.
The first point is (x,y) , here it is (xmin,ymin).
The second point is(x+width,y)
Third point is (x+width, y+height)
Fourth point is (x,y+height)
Since I am using the plot function I need to connect the 1st and the fourth point.
So I need a fifth point i.e (x,y) which completes the rectangle.
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