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Performance result: Training vs Test

HeikoeWin786HeikoeWin786 Member Posts: 30 Contributor II
Dear all,

I am new to rapidMiner and I wanted to perform NBC on airline dataset. I have a airline dataset with labelled data of sentiment (pos, neg, and netural).  I had divided the dataset 75/25 data split and perform the text processing (i.e. nominal to text, data to document, preprocess document with tokenization, stopwords). However, when the result out in word from preprocess document operator, I found the neg,pos and netural data columns have all zero value. Then, after I implemented the NBC, I receive accuracy of 87% for training but 0.00% accuracy for the test dataset. 

Can you please kindly help me to understand what I am missing here?

Thanks a lot in advance!


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