ConfusionMatrix

mksaad
mksaad New Altair Community Member
edited November 5 in Community Q&A
hello,

I applied classification process with Xvalidation (10 folds cross validation with stratified sampling) But I got strange confusion matrix ! (for example Class A14 has neither correctly nor incorrectly instances !)

is there any problem with my process ?


ConfusionMatrix:														
True:	A1	A2	A3	A4	A5	A6	A7	A8	A9	A10	A11	A12	A13	A14
A1	20	1	0	0	1	0	0	0	0	0	0	0	0	0
A2	0	0	0	0	0	0	0	0	0	0	0	0	0	0
A3	0	0	7	0	0	0	0	0	0	0	0	0	0	0
A4	0	0	0	0	0	0	0	0	0	0	0	0	0	0
A5	9	2	0	2	55	1	3	4	1	18	3	7	5	9
A6	0	0	0	0	0	4	0	0	0	0	0	0	0	0
A7	0	7	11	2	1	5	69	0	21	0	1	0	14	0
A8	0	0	0	0	0	0	0	27	0	0	2	0	0	0
A9	0	0	1	0	3	0	0	0	6	0	1	0	3	0
A10	0	0	0	0	0	0	0	0	0	8	0	1	0	0
A11	0	0	0	0	0	0	1	1	2	0	38	0	1	0
A12	0	0	0	0	0	0	0	0	0	1	0	23	0	0
A13	0	0	0	0	0	0	0	0	0	0	0	0	0	0
A14	0	0	0	0	0	0	0	0	0	0	0	0	0	0


Thanks,
--
Motaz K. Saad
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Answers

  • haddock
    haddock New Altair Community Member
    Hi,

    This matrix says that the label A14 was never predicted in validation ( as shown the last row ), even though it was the correct answer in 9 cases ( as shown in the last column ).

    The confusion matrix lives up to its name again  :-\
  • MUNISHVIRANG
    MUNISHVIRANG New Altair Community Member
    Hi

    According to the confusion matrix all that belong to A 14 class (9) ,have been misclassified in A5 category.


    Munish 
  • mksaad
    mksaad New Altair Community Member
    ummmm

    Oh yes, I was confused because I am familiar with weka Confusion Matrix.

    in last column, we have 9 instances of class A14, and all of them have been incorrectly classified as A5 class.


    Thanks,
    --
    Motaz K. Saad

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