Hello,
There something obviously wrong with finance.TimeSeries. Here is the
relevant Sage session, using the online interface at http://www.sagenb.org/
:
a = finance.TimeSeries ([1, 2, 3])
a.correlation (a)
0.6666666666666666
a.covariance (a)
0.6666666666666666
Cheers, Pasha
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