How to plot a rectangle from a single point ?

Is there a way to plot a rectangle from a single point?

Answer 1

[Wan Ji]

Hi,

Use rectangle function

rectangle('Position',[0,0,2,4]); % [x_left_down_corner, y_left_down_corner, length, width]

Use axis function make it look clear

axis([-1,3,-1,5])
axis equal

[Wan Ji]

at least 4 parameters can define a rectangle.

[Salem]

Thank you, I have a point named for ex. 'dot' which has x and y value. Can I recall the name of a point rather than specify in numbers again the position of the rectangle?

[Wan Ji]

It is not enough to have x and y, but still length and width are required.

length = 2;
width = 4;
rectangle('Position',[ex.x, ex.y, length, width]); % [x_left_down_corner, y_left_down_corner, length, width]