How to shade area of Integral

Hi I have a simple function y(z) = -1*z^3+4*z^2+-5*z+2 I have the integral in range of x= 0-5. I have the plot of the graph. I would like to shade this area on the graph.

What do I do? THANKS!

Answer 1

[Star Strider]

I’m not quite certain what you want. This shades the area between the x-axis and the value of the integral over the interval (0,5):

y = @(z) -1*z.^3+4*z.^2+-5*z+2;
x = linspace(0, 5);

inty = cumtrapz(x,y(x));

figure(1)
plot(x, inty, '-k', 'LineWidth',1)
hold on
patch([x fliplr(x)], [zeros(size(x)) fliplr(inty)], 'g')
hold off
grid

[Muthu Annamalai]

Nice!

[Star Strider]

Thank you, Muthu!

[Pratik P]

Exactly what I was trying to do. You sir are good thanks, I owe you a Coffey or beer what ever your flavor is.

[Star Strider]

My pleasure!

The sincerest expression of appreciation here on MATLAB Answers is what you have already done, that being your Accepting my Answer. If we ever meet, a coffee or beer together would be nice!

Answer 2

[WAT]

It sounds like you want the area() function.

http://www.mathworks.com/help/matlab/ref/area.html