computebiastest computetest1 
254 : .5
250 : .5
result 1.0 (0.5, -2.0, 2.5, 0.0)

computebiastest computetest2
22 : .5
254: .5
result .5 (2.0, -4.5, 3.0, 0.0)

computebiastest computetest3
22 : 1.0
result .3333333 (3.0, -6.0, 3.0, 0.0)

updatebiastest updatetest1
(3.0, -6.0, 3.0, 0.0)
+102 : .75
-22 : .75
result .4514 (.75, -3.0, 2.25, 0.0)