diff -r 663c2a9108d1 -r 4de31fdc0d67 main_testing1/drumb_test6.scala
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/main_testing1/drumb_test6.scala	Mon Nov 02 02:31:44 2020 +0000
@@ -0,0 +1,18 @@
+//val urban_deltas = get_deltas(get_prices(List("GOOG", "AAPL"), 2010 to 2012))
+/*
+def myassert(cond : => Boolean) = {
+  try {
+    assert(cond)
+  } catch { 
+    case _ : Throwable => System.exit(1)
+  }
+}
+*/
+
+val ds_urban = List(List(Some(-0.03573991804411003), Some(0.539974575389325)), 
+                    List(Some(0.10103414222249969), Some(0.24777764141006836)))
+
+
+
+assert(CW6b.yearly_yield(ds_urban, 100, 0) == 125)
+assert(CW6b.yearly_yield(ds_urban, 100, 1) == 117)