It is the classical Trapezoidal method in numerically integrating a given function. It asks the user the number of (equally-spaced) segments on which the function would be evaluated. a 1-segment evaluation is a single application of the Trapezoidal rule.
Robby Ching (2020). Trapezoidal rule-function (https://www.mathworks.com/matlabcentral/fileexchange/77654-trapezoidal-rule-function), MATLAB Central File Exchange. Retrieved .
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