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Problem with non-integer order of polylog

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In the MATLAB documentation for the polylog function, there is an example with non-integer order (first argument):
Li = polylog(-0.2i,2.5)
Li =
-2.5030 + 0.3958i
However, when I try to reproduce this example, I get the following error message:
"Error using symengine
First argument must be an integer."
Does this mean that I don't have a version of MATLAB updated enough to use the function in this context? I have a MATLAB 2018a.
Also, does anyone know how to find a function's update history in the MATLAB documentation? I couldn't do this alone.

Accepted Answer

Walter Roberson
Walter Roberson on 7 Mar 2021
r2019a is the first release to support non-integer orders

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