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How to find the definite integral?

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Jiyeon Jang
Jiyeon Jang 2021-5-22
评论： Nagasai Bharat 2021-5-24
Here is the code I have..
X = zeros(1,length(data));
Y = zeros(1,length(data));
for i = 1:101
temp = strsplit(data{i},',');
X(i) = str2double(temp{3}); Y(i) = str2double(temp{4});
end
for i = 102:length(data)
temp = strsplit(data{i},',');
X(i) = str2double(temp{2}); Y(i) = str2double(temp{3});
end
In this code the length(data) is 10, and What should I do if I want to find the absolute value of Y(i) from 0 to 1200?
like this.
  2 个评论
Torsten
Torsten 2021-5-22
1/X(end)*trapz(X,abs(Y))
Why do you repeat your question ? It was already answered in another thread.
Nagasai Bharat
Nagasai Bharat 2021-5-24
Hi,
The following documentation would help you in finding the the definite intergral value you need.
Definite and indefinite integrals - MATLAB int (mathworks.com)
Trapezoidal numerical integration - MATLAB trapz (mathworks.com)
As already suggested, many answered questions related to yours can be found in the community.

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