The algorithm to calculate the fractional power in MATLAB?

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Choszit Lee
Choszit Lee il 15 Apr 2017
Commentato: Choszit Lee il 19 Apr 2017
>> (-1).^(2/3)
ans =
-0.5000 + 0.8660i
>> ((-1).^2).^(1/3)
ans =
1
I tried to calculate the fractional power 2/3 of the negative -1, then I found the results above...Orz...Could anyone help me to understand this issue? THX.

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the cyclist
the cyclist il 15 Apr 2017
Modificato: the cyclist il 15 Apr 2017
This is explained in the documentation for power (especially the "Find Roots of Number" section) and nthroot.

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