the acos funtion will not accept negagive numbers (e.g. -075) . WHY?

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Timothy Goldsmith
Timothy Goldsmith on 6 Mar 2017
Commented: Timothy Goldsmith on 7 Mar 2017
>> x = -1:.05:1;
plot(x,acos(x))
grid on
Subscript indices must either be real positive integers or logicals.

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Accepted Answer

Walter Roberson
Walter Roberson on 6 Mar 2017
You have either defined a variable named "acos" or a variable named "plot"

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