how do I shade area under graph with specific x interval?

a=10;

t=0:0.1:200;

c_L=0.2.*(1-exp(1).^(-1/a.*t))

plot(t,c_L)

this is my graph and I just want to shade area between t=60:0.1:200;

what function should I use?

Answer 1

[Ameer Hamza]

Try something like this

a=10;
t=0:0.1:200;
c_L=0.2.*(1-exp(1).^(-1/a.*t));

t_shade = 60:0.1:200;
c_L_shade = 0.2.*(1-exp(1).^(-1/a.*t_shade));

plot(t,c_L)
hold on
patch([t_shade fliplr(t_shade)], [c_L_shade zeros(size(c_L_shade))], ...
    'r', ...
    'FaceAlpha', 0.2)

[Jong Hyun Lee]

Thank you for good answer, may I ask what does "patch" command do?

[Ameer Hamza]

It is used to draw a polygon, given the x and y coordinates.

Answer 2

[Image Analyst]

For a more general solution, see the FAQ:

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