Drawing a trapezium in matlab

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Darren Koh
Darren Koh 2018-2-23
评论： Thomas Di Dio 2023-8-19
Is there a quick way, apart from using vertices, to draw an isosceles trapezium given the height and the length of both parallel sides? Thank you.

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KSSV
KSSV 2018-2-23
编辑：KSSV 2018-2-23
h = 1 ; % height
a = 2 ; % top side
b = 4 ; % base
%%Frame vertices
A = [0 0] ;
B = [b 0] ;
C = [0.5*(b-a)+a h] ;
D = [0.5*(b-a) h] ;
coor = [A ; B; C; D] ;
patch(coor(:,1), coor(:,2),'r')
Refer here how the coordinates are formed: http://mathworld.wolfram.com/IsoscelesTrapezoid.html
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DGM
DGM 2023-8-17
See patch().
The argument list are x-coordinates, y-coordinates, and the line color.
A,B,C,D are [x y] pairs. They're simply concatenated to form the 4x2 matrix coor, from which the x,y vectors are taken in the call to patch().

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