testing1/drumb_test6.scala
author Christian Urban <christian dot urban at kcl dot ac dot uk>
Tue, 06 Aug 2019 00:12:34 +0100
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//val urban_deltas = get_deltas(get_prices(List("GOOG", "AAPL"), 2010 to 2012))
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val ds_urban = List(List(Some(-0.03573992567129673), Some(0.539975124774038)), 
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                    List(Some(0.10103412653643493), Some(0.24777709700099845)))
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assert(yearly_yield(ds_urban, 100, 0) == 125)
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assert(yearly_yield(ds_urban, 100, 1) == 117)