Trapezoidal numerical integration using for loops

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SGer
SGer 2022-9-30
编辑： James Tursa 2022-9-30
Hi there,
I'm trying to create a for loop that calcuates the trapezoidal rule for a arrray of x and fx values without using the trapz function at different x points.
e.g.
x = 0, 0.25, 0.5, 0.75, 1
y = 0, 0.03, 0.006, 0.001, 0.06
Can someone please provide some guidance

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回答（1 个）

James Tursa
James Tursa 2022-9-30
编辑：James Tursa 2022-9-30
See the Trapezoidal Method section here for the fomula:
https://www.mathworks.com/help/matlab/ref/trapz.html?searchHighlight=trapz&s_tid=srchtitle_trapz_1
or here:
https://en.wikipedia.org/wiki/Trapezoidal_rule
Just write a for-loop to calculate the sum shown.

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