Trapezoidal with Simpson's rule-data

A combination of Trapezoidal and Simpson's rule (1/3 and 3/8) in evaluating a given set of data


Updated 25 Oct 2020

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If two points have unequal segments, the Trapezoidal rule would be applied. If 3 points have equal segments, Simpson's 1/3 rule would be applied. If 4 points have equal segments, Simpson's 3/8 rule would be applied. This method gives better estimates than using the Trapezoidal rule alone.

Cite As

Robby Ching (2023). Trapezoidal with Simpson's rule-data (, MATLAB Central File Exchange. Retrieved .

MATLAB Release Compatibility
Created with R2020a
Compatible with any release
Platform Compatibility
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Version Published Release Notes

Corrected an error wherein if the size of the data is either 2 by 2 or 3 by 3, it would either result in an undefined integral value (I) or will copy the previously calculated I value. That is, it now evaluates data of 2 by 2 and 3 by 3 sizes.