Loop to calculate area under curve using rectangle methode
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Hello everyone I have a graph plotted in Matlab (no function), as data was imported via Excel, I am looking for a loop to calculate the area under the curve of each interval and then add them to get the entire area
Here's how my graph look like
2 个评论
Akira Agata
2018-4-18
How about using trapz function, instead of trying rectangle method. Or, do you have to try rectangle method for some reason?
Andre
2018-4-19
回答（1 个）
Akira Agata
2018-4-23
Sorry for my late response. Here is an simple example.
% Sample data
dx = pi/10;
x = 0:dx:2*pi;
y = 1+sin(x);
% integral of y = f(x) via trapezoidal method (S1) and rectangle method (S2)
S1 = trapz(x,y);
S2 = sum(y*dx);
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2018-4-23
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