The information-retrieval tag has no wiki summary.
2
votes
0answers
61 views
Software library for Hidden Markov Modeling of a large text database
Given
we have a large database of texts (e.g. product descriptions)
and we want to extract multiple types of information (e.g. brand, release date, features, price, etc.)
what's a good library to ...
2
votes
0answers
232 views
Similarity calculations for arrays
First of all, my apologies if I mess up the terminology. I've been out of math for several years, so I'm certain I'm going to use terms incorrectly. Also, though I concentrated mathematics in college, ...
2
votes
0answers
122 views
How to to calculate the topic distribution of a document
I have a simple (may be stupid) question. I want to calculate Kullback–Leibler divergence on two documents. It requires probability distribution of each document.
I do not know how to calculate ...
1
vote
0answers
32 views
MAE/MSE with or without square root
I read some papers about recommender systems and information retrieval, where Mean Absolut Error and Mean Squared Error are mentioned. But I've found some differences between the formal definition of ...
1
vote
0answers
40 views
Is that overfitting?
Given a document-term matrix $X$, where $$X(d, t) = \textit{occurrences of 't' in 'd'}$$, it's possible to compute it's Truncated Singular Value Decomposition:$$X_k = U_k \Sigma_k V_k^T$$
Then, for a ...
1
vote
0answers
51 views
Using sentiment lexicons or all words processing for sentiment analysis?
I am learning sentiment analysis to apply it to twitter real time data to predict user's mood. I ponder about using which alternative way to do that data mining job.
Use all words to process and ...
1
vote
0answers
24 views
Evaluation and Testsets for NNMF
I am trying to evaluate my recommender system which uses Non-negative Matrix Factorization. Some things that I evaluate are
How does the size of the feature matrix affect the recommendations
How ...
0
votes
0answers
30 views
Inferring user rating from play counts
I am interested in converting user play counts in some sort of rating. Building an artist recommendation system and I have access to user play counts. I can't use them directly in a user-based ...
