tf-idf

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find the top words, relative to all documents

I have some 100.000+ text documents. I\'d like to find a way to answer this (somewhat ambiguous) question:[详细]

2023-04-04 08:01 分类：问答
WEKA - Classifying New Data from Java - IDF Transform

We are trying to implement a WEKA classifier from inside a Java program. So far so good, everything works well however when building 开发者_C百科the classifier from the training set in Weka GUI we use[详细]

2023-04-01 11:19 分类：问答
Python and tfidf algorithm, make it faster?

I am implementing the tf-idf algorithm in a web application using Python, however it runs extremely slow. What I basically do i开发者_JS百科s:[详细]

2023-03-30 23:56 分类：问答
N-Gram, tf-idf and Cosine similarity in Perl

I am trying to do some pattern \'mining\' in piece of multi word on each line. I have done the N-gram analysis using the Text::Ngrams module in perl which give me the frequency of each word . I am how[详细]

2023-03-15 21:41 分类：问答
Algorithm for returning similar documents represented in Vector space model

I have a DB containing tf-idf vectors of about 30,000 documents. I would like to return for a given document a set of similar documents - about 4 or so.[详细]

2023-03-14 21:38 分类：问答
How to implement TF_IDF feature weighting with Naive Bayes

I\'m trying to implement the naive Bayes classifier for sentiment analysis. I plan to use the TF-IDF weighting measure. I\'m just a little stuck 开发者_如何转开发now. NB generally uses the word(featur[详细]

2023-03-12 04:18 分类：问答
Cosine similarity and tf-idf

I am confused by the following comment about TF-IDF and Cosine Similarity. I was reading up on both and then on wiki under Cosine Similarity I find this sentence \"In case of of information retrieva[详细]

2023-03-11 15:26 分类：问答
How to extract semantic relatedness from a text corpus

The goal is to assess semantic relatedness between terms in a large text corpus, e.g. \'police\' and \'crime\' should have a stronger semantic relatedness than \'p开发者_StackOverflow中文版olice\' and[详细]

2023-03-08 02:05 分类：问答
Lucene custom scoring for numeric fields

I would like to have, in addition to standard term search with tf-idf similarity over text content field, scoring based on \"similarity\" of numeric fields. This similarity will be depending on distan[详细]

2023-03-04 20:04 分类：问答
How to calculate the frequency for a special term in a document field?

I just wonder how Lucene can make it,and from the source code I know that it opens and loads the segment files when intializing a searcher with a IndexReader,but Is there any kind person tell me how L[详细]

2023-02-26 10:13 分类：问答