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rconfusion-matrix
Avi
Avi

Reputation: 2283

Extracting table from Confusion Matrix

I have the following confusion matrix (received from summary of model summary (model) ):

=== Confusion Matrix ===

   a   b   c   <-- classified as
 344  12   4 |   a = 1
  28  43   4 |   b = 2
   9   1  32 |   c = 3

I would like to extract into df1 just the matrix content as followed:

  a   b   c 
 344  12   4
  28  43   4
   9   1  32

We should take into consideration that the size of the matrix can be changed. I need a general solution. Is there a way to extract it straightforward from the model and from txt file as well?

Upvotes: 0

Views: 891

Answers (1)

Avi
Avi

Reputation: 2283

My source model is from J48 model:

> class(summary (model) ) 
[1] "Weka_classifier_evaluation"

In order to get the confusion matrix:

> summary (model)$confusionMatrix
   predicted
      1  2  3
  1 344  12   4
  2  28  43   4
  3   9   1  32

Upvotes: 1

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