Evaluating a function, variable not defined
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hello, I am trying to evaluate a function but I receive an error. Will someone please help? My error is
y = feval(minusF,x)
Undefined function or variable 'x'.
thanks.
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Stephen23
2015년 9월 8일
편집: Stephen23
2015년 9월 8일
You have not defined any variable named x.
It is like you call this:
sin(x)
but have not specified x anywhere. MATLAB does not invent values to use, it uses the values that you have defined, or else it throws an error. In this case, because you have not defined any variable x, it throws an error.
But really you should avoid using feval and use function handles instead. These are more robust, are much neater, and allow you to use the standard editor code hinting and debugging tools.
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