diff -r a057dc4457fc -r 87b9e3e2c1a7 testing1/drumb.scala
--- a/testing1/drumb.scala	Tue Oct 29 11:11:44 2019 +0000
+++ b/testing1/drumb.scala	Tue Oct 29 14:12:24 2019 +0000
@@ -1,7 +1,7 @@
-// Part 2 and 3 about a really dumb investment strategy
+// Main Part about a really dumb investment strategy
 //======================================================
 
-//object CW6b { // for purposes of generating a jar
+object CW6b {
 
 
 //two test portfolios
@@ -73,16 +73,13 @@
 
 
 //test cases
-//val p_fb = get_prices(List("FB"), 2012 to 2014)
-//val p = get_prices(List("GOOG", "AAPL"), 2010 to 2012)
-
-//val tt = get_prices(List("BIDU"), 2004 to 2008)
 
+//println("Task 3 data from Google and Apple in 2010 to 2012")
+//val goog_aapl_prices = get_prices(List("GOOG", "AAPL"), 2010 to 2012)
+//println(goog_aapl_prices.toString ++ "\n")
 
-//==============================================
-// Do not change anything below, unless you want 
-// to submit the file for the advanced part 3!
-//==============================================
+//val p_fb = get_prices(List("FB"), 2012 to 2014)
+//val tt = get_prices(List("BIDU"), 2004 to 2008)
 
 
 // (4) The function below calculates the change factor (delta) between
@@ -105,8 +102,13 @@
     for (j <- (0 until (data(0).length)).toList) yield get_delta(data(i)(j), data(i + 1)(j))
 
 
+
 // test case using the prices calculated above
-//val d = get_deltas(p)
+
+//println("Task 5 change prices from Google and Apple in 2010 and 2011")
+//val goog_aapl_deltas = get_deltas(goog_aapl_prices)
+//println(goog_aapl_deltas.toString ++ "\n")
+
 //val ttd = get_deltas(tt)
 
 
@@ -124,6 +126,21 @@
   }
 }
 
+// test case using the deltas calculated above
+//println("Task 6 yield from Google and Apple in 2010 with  balance 100")
+
+//val d0 = goog_aapl_deltas(0)(0)
+//val d1 = goog_aapl_deltas(0)(1)
+//println(s"50 * ${d0.get} + 50 * ${d1.get} = ${50.toDouble * d0.get + 50.toDouble * d1.get}")
+
+
+//val goog_aapl_yield = yearly_yield(goog_aapl_deltas, 100, 0)
+//println("Rounded yield: " ++ goog_aapl_yield.toString ++ "\n")
+
+
+//yearly_yield(get_prices(rstate_portfolio, 2016 to 2018), 100, 2) 
+//get_prices(rstate_portfolio, 2016 to 2018)(2).flatten.sum
+
 
 // (7) Write a function compound_yield that calculates the overall balance for a 
 //     range of years where in each year the yearly profit is compounded to the new 
@@ -147,21 +164,10 @@
 
 //test cases for the two portfolios given above
 
-//println("Real data: " + investment(rstate_portfolio, 1978 to 2018, 100))
-//println("Blue data: " + investment(blchip_portfolio, 1978 to 2018, 100))
+//println("Real data: " + investment(rstate_portfolio, 1978 to 2019, 100))
+//println("Blue data: " + investment(blchip_portfolio, 1978 to 2019, 100))
 
-//}
+}
 
 
-//val ds = get_deltas(get_prices(List("GOOG", "AAPL"), 2010 to 2012))
-//yearly_yield(ds, 100, 0)  => 125
-//yearly_yield(ds, 100, 1)  => 117
 
-//investment(List("GOOG", "AAPL", "BIDU"), 2000 to 2000, 100) // => 100
-//investment(List("GOOG", "AAPL", "BIDU"), 2000 to 2001, 100) // => 27
-//investment(List("GOOG", "AAPL", "BIDU"), 2000 to 2002, 100) // => 42
-//investment(List("GOOG", "AAPL", "BIDU"), 2000 to 2003, 100) // => 27
-//investment(List("GOOG", "AAPL", "BIDU"), 2000 to 2004, 100) // => 38
-//investment(List("GOOG", "AAPL", "BIDU"), 2000 to 2005, 100) // => 113
-//investment(List("GOOG", "AAPL", "BIDU"), 2000 to 2006, 100) // => 254
-//investment(List("GOOG", "AAPL", "BIDU"), 2000 to 2007, 100) // => 349