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Issues implementing quad function to a definite integral using element by element calculations

1 次查看（过去 30 天）
Adriel Martinez-Alvarez
关闭： MATLAB Answer Bot 2021-8-20
Hello, I am having issues with element by element math when trying to implement the quad function to calculate a definite integral. I keep receiving an error from the compiler, however, my other functions are working. Could someone please guide me in fixing my last function (y5)?
y2 = quad('(.5*x.^3)./(1+2*sqrt(x))', 2, 10)
y3 = quad('.5 + ((cos(1.2*x))./((x+2).^2))', 0, 9)
y4 = quad('(exp(x))./(x.^3)', 1, 8)
y5 = quad('((cos(x)). * (exp^(sqrt(x)))', 0, pi*4)

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回答（2 个）

Star Strider
Star Strider 2017-4-7
Instead of the single-quote syntax that is probably not permitted, use Anonymous Function syntax.
Example —
y2 = quad(@(x) (.5*x.^3)./(1+2*sqrt(x)), 2, 10)
y2 =
190.2484
See the documentation on Anonymous Functions for more informaiton on them and how to use them.
Torsten
Torsten 2017-4-10
y5=quad('cos(x).*exp.^sqrt(x)',0,pi*4)
Best wishes
Torsten.

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