A new LDA formulation with covariates
A new LDA formulation with covariates
复制标题
一种新的带有协变量的 LDA 公式
DOI:
10.1080/03610918.2023.2171059
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发表时间:
2023
期刊:
影响因子:
--
通讯作者:
Valle, Denis
中科院分区:
文献类型:
--
作者:
Shimizu, Gilson Y.;Izbicki, Rafael;Valle, Denis
The Latent Dirichlet Location (LDA) model is a popular method for creating mixed-membership clusters. Despite having been originally developed for text analysis, LDA has been used for a wide range of other applications. We propose a new formulation for the LDA model which incorporates covariates. In this model, a negative binomial regression is embedded within LDA, enabling straight-forward interpretation of the regression coefficients and the analysis of the quantity of cluster-specific elements in each sampling units (instead of the analysis being focused on modeling the proportion of each cluster, as in Structural Topic Models). We use slice sampling within a Gibbs sampling algorithm to estimate model parameters. We rely on simulations to show how our algorithm is able to successfully retrieve the true parameter values and the ability to make predictions for the abundance matrix using the information given by the covariates. The model is illustrated using real data sets from three different areas: text-mining of Coronavirus articles, analysis of grocery shopping baskets, and ecology of tree species on Barro Colorado Island (Panama). This model allows the identification of mixed-membership clusters in discrete data and provides inference on the relationship between covariates and the abundance of these clusters.
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影响因子:
3.3
作者:
J. K. Pritchard;Matthew Stephens;Peter Donnelly
通讯作者:
J. K. Pritchard;Matthew Stephens;Peter Donnelly
DOI:
10.18653/v1/2020.nlpcovid19-2.12
发表时间:
2020
期刊:
Proceedings of the 1st Workshop on NLP for COVID-19 (Part 2) at EMNLP 2020
影响因子:
--
作者:
Yulia Otmakhova;K. Verspoor;Timothy Baldwin;Simon Suster;Jey Han Lau
通讯作者:
Jey Han Lau
影响因子:
4
作者:
Liu, Nan;Chee, Marcel Lucas;Ong, Marcus Eng Hock
通讯作者:
Ong, Marcus Eng Hock
影响因子:
8.8
作者:
Albuquerque, Pedro H. M.;do Valle, Denis Ribeiro;Li, Daijiang
通讯作者:
Li, Daijiang
DOI:
10.1109/tpami.1984.4767596
发表时间:
1984-01-01
影响因子:
23.6
作者:
GEMAN, S;GEMAN, D
通讯作者:
GEMAN, D