How to calculate a natural logarithm of a function handle?

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Max
Max 2016-2-10
编辑： Matt J 2016-2-10
Hello,
I would like to calculate the ln of the function Inum which is an integral of a symbolic function y(t). For that I converted y(t) into a function handle.
ynum=matlabFunction(y);
Inum=@(x)integral(ynum,0,tfail(i));
f = log(Inum);
Does anybody know why the code above is not working?

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回答（1 个）

Matt J
Matt J 2016-2-10
编辑：Matt J 2016-2-10
You define Inum as an anonymous function of x, but 'x' appears nowhere in the expression
integral(ynum,0,tfail(i))
Also, since Inum is a function, then its log should also be a function
f=@(x) log(Inum(x));

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