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.