Friday

Yesterday I did a number of experiments with NNs. I couldn't get a score of more than 51% for any network topography despite adjusting training cycles etc. The performance of many of the networks was remarkably similar.

I identified those cases which gave false +ve and -ve results and added them to the training sets but performance deteriorated. The data is ambiguous. Some patients have virtually the same sets of data but different outcomes. There are not enough data items to improve the performance - no ER/PR results etc.

Preprocessed the training set for the KBS. I couldn't get excel to output a .csv file so I had to produce it manually. I then copied these into word so that I could paste who strings into the console window of flex.

Today I have been running these and have noticed that rule 8c is not working properly as it is replacing the certainty from the previous rules and replaces it.

C.F. : TRY : r9c
C.F. : LOOKUP : (location is central) = -1
C.F. : LOOKUP : (grade is '1') = 1
C.F. : AND : -1 + 1 -> -1
C.F. : IMPLIES : cf(-0.5) @ -1 -> 0.5
C.F. : LOOKUP : (prognosis is reccurence) = 0.1
C.F. : CONFIRMS : 0.1 + 0.5 -> 0.55
C.F. : UPDATE : (prognosis is reccurence) = 0.55
C.F. : FIRED : r9c

C.F. : TRY : r8c
C.F. : LOOKUP : (grade is '3') = -1
C.F. : IMPLIES : cf(0.35) @ -1 -> -0.35
C.F. : UPDATE : (prognosis is recurrence) = -0.35
C.F. : FIRED : r8c

C.F. : TRY : r7c
C.F. : LOOKUP : (grade is '2') = -1
C.F. : IMPLIES : cf(0.1) @ -1 -> -0.1
C.F. : LOOKUP : (prognosis is recurrence) = -0.35
C.F. : CONFIRMS : -0.35 + -0.1 -> -0.415
C.F. : UPDATE : (prognosis is recurrence) = -0.415
C.F. : FIRED : r7c

I need to sort this before continuing.

Also if the CF.:CONFIRMS lines are supposed to be adding the numbers together they are wrong.

C.F. : TRY : r11c
C.F. : LOOKUP : (size is less_than_15) = 1
C.F. : IMPLIES : cf(-0.25) @ 1 -> -0.25
C.F. : LOOKUP : (prognosis is reccurence) = -0.5
C.F. : CONFIRMS : -0.5 + -0.25 -> -0.625 [-0.5+ -0.25 = -0.75]
C.F. : UPDATE : (prognosis is reccurence) = -0.625
C.F. : FIRED : r11c