MATLAB Answers

# Integrating a function with one of the limits a matrix

4 views (last 30 days)
Alyssa Pope on 3 Apr 2021
Commented: darova on 4 Apr 2021
Hi, just needing some help on integrating this function. I have a function that I'm trying to integrate in terms of y, and one of the bounds on the integral is a matrix that I also calculate within the code. Here is my current code:
r = 350;
S = 0.001;
T = 2400;
t = [1:1:100];
u = ((r^2)*S)./(4*T.*t);
syms y
f = exp(-y)./(y);
integralCalculated = integral(@(y)exp(-y)./(y),u,inf);
So the idea is that I'm integrating from u to infinity where u has 100 components, so that I'll get an output of a matrix that also has 100 values. I get the error that A and B must be floating point scalars, and I've seen some threads that use arrayfun but wasn't clear on how it applies to the function I'm using. Thanks for any help.
##### 0 CommentsShowHide -1 older comments

Sign in to comment.

### Accepted Answer

darova on 4 Apr 2021
Why don't just use for loop?
integralCalculated = zeros(size(u));
for i = 1:length(u)
integralCalculated(i) = integral(@(y)exp(-y)./(y),u(i),inf);
end
##### 2 CommentsShowHide 1 older comment
darova on 4 Apr 2021
my pleasure

Sign in to comment.

### Community Treasure Hunt

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

Start Hunting!