Evaluate the following triple integral using single applications of Simpson’s 1/3 rule.

3 views (last 30 days)
Evaluate the following triple integral using single applications of Simpson’s 1/3 rule. I have all the code for this question but I am getting error: Undefined function or variable 'simpson'. How to fix this error or add the 'simpson' function.
x1 = [-3:0.01:1];
fx1 = (x1).^2;
a= simpson(x1,fx1 , [],'1/3');
y1 = [0:0.01:2];
fy1 = ones(length(y1),1);
b= simpson(y1,fy1 , [],'1/3');
z1 = [-2:0.01:2];
fz1 = ones(length(z1),1);
c= simpson(z1,fz1 , [],'1/3');
I1 =a*b*c;
x2 = [-3:0.01:1];
fx2 = ones(length(x2),1);
aa= simpson(x2,fx2 , [],'1/3');
y2= [0:0.01:2];
fy2 = y2;
bb= simpson(y2,fy2 , [],'1/3');
z2 = [-2:0.01:2];
fz2 = z2;
cc= simpson(z2,fz2 , [],'1/3');
I2=aa*bb*cc;

Answers (2)

KSSV
KSSV on 29 Nov 2016
There is no inbuilt function named simpson in matlab. You may check quad inbuilt function or download the file from the exchange.
  2 Comments
Moon Shadow
Moon Shadow on 29 Nov 2016
Here Simpson function https://www.mathworks.com/matlabcentral/fileexchange/28726-simpson-s-rule-integration/content/simpsons.m

Sign in to comment.


Moon Shadow
Moon Shadow on 29 Nov 2016
How to use file from the exchange in the matlab? I want to use simps function.
  1 Comment
KSSV
KSSV on 29 Nov 2016
Download the file, copy in a folder, read the documentation part of the file, see how to input and then use. Mostly they give an example on how to run. First run the code for example case.

Sign in to comment.

Categories

Find more on Numerical Integration and Differential Equations in Help Center and File Exchange

Community Treasure Hunt

Find the treasures in MATLAB Central and discover how the community can help you!

Start Hunting!