bug in the function

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yonatan friedman 2021-1-14

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评论： Cris LaPierre 2021-1-15

What do I need to write in f2 (u1, u2) so that I do not have the error :

Undefined function or variable 'ETA'.

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Cris LaPierre 2021-1-14

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https://ww2.mathworks.cn/matlabcentral/answers/717293-bug-in-the-function#answer_598228

What is ETA?

You cannot use a variable you have not defined. Perhaps you think this variable is loaded by data.mat, but apparently not.

The problem is when your for loop counter is 7, the value of d in f4 is a single number. However, in computing ETA, you use d(end-1). Since there is only a single value, end-1=0, which causes the error that you see.

Cris LaPierre 2021-1-15

These types of errors are difficult if not impossible to spot by just inspecting your code. The best way to track down the issue is to learn how to use the debugger.

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