String Class for Confusion Matrix
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Hi, my code is like below :
predictors = [apple apple watermelon watermelon orange orange];
validationPredictions = [apple apple apple apple orange apple];
confuseMatrix = confusionmat(predictors, validationPredictions);
Where :
- predictors = Class names (string data type) of data training.
- validationPredictions = Class names (string data type) as a result of classification.
What i know is, confusionmat need for integer value type for both of True Class and Predict Class.
I got error for running my code above, it seems the data must a integer but my classes is string. How to solve this?
If possible, i need a Confusion Matrix like this (taken from Classification Learner App Toolbox) :

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Tom Lane
2016년 5월 19일
If I run this right before your code:
apple = {'apple'}; watermelon = {'watermelon'}; orange = {'orange'};
then I get a matrix result with no error. How did you define these variables? What release of MATLAB are you using?
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