trapz or integral which one is more accurate?

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masoud avaznejad
masoud avaznejad 2020-8-23
回答： Alan Stevens 2020-8-23
clc
clear
close all
x = linspace(0,100);
y = x.^cos(x);
plot(x,y);
a = trapz(x,y);
y = @(x)x.^cos(x);
b = integral(y,0,100);
c=a-b;

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采纳的回答

Alan Stevens
Alan Stevens 2020-8-23
integral is more accurate here. Try
x = linspace(0,100,1000);
and you will find the trapz result reduces to get much closer to the integral result.

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