Shade area under two lines

x1 and x2 are restricted to positive values only. Need to shade the area under two intersecting lines. Only want the area that is included under the intersection of both lines. x1 + 2*x2=4 and 3*x1 + 2*x2=6

Answer 1

[KSSV]

x = linspace(0,5) ; 
y1 = (4-x)/2 ; 
y2 = (6-3*x)/2  ;


x = [x  flip(x)] ;
y = [y1  flip(y2)] ; 

patch(x,y,'r')

[Jeffrey Meisner]

Looking for the area below where both lines intersect

[Image Analyst]

Just take the min

bottomLine = min([y1; y2]); % Assuming y1 and y2 are row vectors.
area = sum(bottomLine);

Or you can use trapz() depending on what method you want to use for finding the sum of areas under the bottomLine elements.

Answer 2

[Image Analyst]

See the FAQ:

https://matlab.fandom.com/wiki/FAQ#How_do_I_shade_the_region_between_two_curves.3F