1 //val urban_deltas = get_deltas(get_prices(List("GOOG", "AAPL"), 2010 to 2012))

     2 /*

     3 def myassert(cond : => Boolean) = {

     4   try {

     5     assert(cond)

     6   } catch { 

     7     case _ : Throwable => System.exit(1)

     8   }

     9 }

    10 */

    11 

    12 val ds_urban = List(List(Some(-0.03573991804411003), Some(0.539974575389325)), 

    13                     List(Some(0.10103414222249969), Some(0.24777764141006836)))

    14 

    15 

    16 

    17 assert(CW6b.yearly_yield(ds_urban, 100, 0) == 125)

    18 assert(CW6b.yearly_yield(ds_urban, 100, 1) == 117)