Question about using quad function
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Hello, I've been trying to integrate a function (5+log(x))/(x.^2+1) using the quad function, so I input
quad('(5+log(x))/(x.^2+1)',1,4)
However, I keep getting the error
Error using quad (line 79) The integrand function must return an output vector of the same length as the input vector.
Can someone help with with this?
采纳的回答
the cyclist
2011-10-22
Notice the one additional period I added:
quad('(5+log(x))./(x.^2+1)',1,4)
更多回答（1 个）
Wayne King
2011-10-22
You need a ./ in your division.
For example:
x = 1:.01:4;
quad(@(x) (5+log(x))./(x.^2+1),1,4)
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