domain error. to compute complex results from real x, use 'log(complex(x))'

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farid
farid 2023-7-9
评论： Walter Roberson 2023-7-10
hello, I'm having trouble with the domain error. to compute complex results from real x, use 'log(complex(x))' on my project fuel cell. how to handle it?

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Walter Roberson
Walter Roberson 2023-7-9
At some point your x becomes negative. MATLAB proper would handle the situation by creating a complex result, but Simulink generates an error message because such situations in Simulink often result from an incorrect model or omission in thinking about the model
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Walter Roberson
Walter Roberson 2023-7-10
When your x goes negative what results would you want from the log()? If you want the log of the absolute value of x then code the log of the absolute value of x.

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