Plotting Area of a function
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Rodrigo Toledo
on 30 Mar 2021
Commented: Star Strider
on 30 Mar 2021
Hello,
I have this function:
fun = @(x) (x^2 + 2)
q=int(fun,x,[-1,2])
q=9
How do i plot this fun function with the shaddes are betweeen -1, 2 of the integral?
Thanks
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Accepted Answer
Star Strider
on 30 Mar 2021
I am not sure what you want.
Try this:
fun = @(x) (x.^2 + 2)
q = integral(fun,-1,2)
xv = linspace(-2,3);
xseg = xv(xv>=-1 & xv<=2);
figure
plot(xv, fun(xv))
hold on
patch([xseg fliplr(xseg)], [fun(xseg) zeros(size(xseg))], 'b', 'FaceAlpha',0.25)
hold off
text(mean(xseg), q*0.1, sprintf('$\\int_{%d}^{%d}x^2+2 dx = %d$',-1,2,q), 'Horiz','center', 'Vert','middle', 'Interpreter','latex')
.
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