Tagged Questions
0
votes
1answer
125 views
understanding of libsvm output
I applied libsvm to build a text classifier. The output looks like as follows:
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0
votes
0answers
56 views
LIBSVM-based classifier assign very low score to positive validation files
Recently, I have been applying the LIBSVM to build a classifier based on a set of documents. The positive set has about 20000 files and negative set has about 50000 files. The built classifier is then ...
0
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0answers
53 views
the effects of feature matrix format on the training time of LIBSVM
I am using Libsvm to perform text classification tasks. I normally uses binary occurrence, TF/IDF to build feature set for the input documents. It normally takes quite longer for Libsvm to finish ...
1
vote
1answer
107 views
The general approaches for improving a SVM-based classifier which is low precision and high recall
I built a SVM-based classifier against a data set, the precision is about 66% and the recall is about 88%. Generally, what are the options to tune the parameter that can increase the precision?
5
votes
3answers
424 views
Support vector machine for text classification
I am currently having a data set, class 1 with about 8000 short text files and class 2 with about 3000 short text files. I applied LibSVM and tried a couple of parameter combinations in the ...
