Search Results for author: James G. Scott

Found 15 papers, 7 papers with code

Functional response regression with funBART: an analysis of patient-specific stillbirth risk

1 code implementation19 May 2018 Jennifer E. Starling, Jared S. Murray, Carlos M. Carvalho, Radek Bukowski, James G. Scott

This article introduces functional BART, a new approach for functional response regression--that is, estimating a functional mean response f(t) that depends upon a set of scalar covariates x. Functional BART, or funBART, is based on the successful Bayesian Additive Regression Trees (BART) model.

Methodology

Interpretable Low-Dimensional Regression via Data-Adaptive Smoothing

no code implementations6 Aug 2017 Wesley Tansey, Jesse Thomason, James G. Scott

We consider the problem of estimating a regression function in the common situation where the number of features is small, where interpretability of the model is a high priority, and where simple linear or additive models fail to provide adequate performance.

Additive models Denoising +1

GapTV: Accurate and Interpretable Low-Dimensional Regression and Classification

no code implementations23 Feb 2017 Wesley Tansey, James G. Scott

We consider the problem of estimating a regression function in the common situation where the number of features is small, where interpretability of the model is a high priority, and where simple linear or additive models fail to provide adequate performance.

Additive models Classification +2

Deep Nonparametric Estimation of Discrete Conditional Distributions via Smoothed Dyadic Partitioning

1 code implementation23 Feb 2017 Wesley Tansey, Karl Pichotta, James G. Scott

We present an approach to deep estimation of discrete conditional probability distributions.

Diet2Vec: Multi-scale analysis of massive dietary data

no code implementations1 Dec 2016 Wesley Tansey, Edward W. Lowe Jr., James G. Scott

Smart phone apps that enable users to easily track their diets have become widespread in the last decade.

Nutrition

Better Conditional Density Estimation for Neural Networks

no code implementations7 Jun 2016 Wesley Tansey, Karl Pichotta, James G. Scott

CDE Trend Filtering applies a k-th order graph trend filtering penalty to the unnormalized logits of a multinomial classifier network, with each edge in the graph corresponding to a neighboring point on a discretized version of the density.

Density Estimation

A Fast and Flexible Algorithm for the Graph-Fused Lasso

1 code implementation24 May 2015 Wesley Tansey, James G. Scott

We propose a new algorithm for solving the graph-fused lasso (GFL), a method for parameter estimation that operates under the assumption that the signal tends to be locally constant over a predefined graph structure.

Tensor decomposition with generalized lasso penalties

no code implementations24 Feb 2015 Oscar Hernan Madrid Padilla, James G. Scott

We present an approach for penalized tensor decomposition (PTD) that estimates smoothly varying latent factors in multi-way data.

regression Tensor Decomposition

Proximal Algorithms in Statistics and Machine Learning

no code implementations11 Feb 2015 Nicholas G. Polson, James G. Scott, Brandon T. Willard

We provide a discussion of convergence of non-descent algorithms with acceleration and for non-convex functions.

BIG-bench Machine Learning regression

False discovery rate smoothing

1 code implementation22 Nov 2014 Wesley Tansey, Oluwasanmi Koyejo, Russell A. Poldrack, James G. Scott

We also apply the method to a data set from an fMRI experiment on spatial working memory, where it detects patterns that are much more biologically plausible than those detected by standard FDR-controlling methods.

Methodology Applications Computation

Sampling Polya-Gamma random variates: alternate and approximate techniques

2 code implementations2 May 2014 Jesse Windle, Nicholas G. Polson, James G. Scott

Efficiently sampling from the P\'olya-Gamma distribution, ${PG}(b, z)$, is an essential element of P\'olya-Gamma data augmentation.

Computation

Priors for Random Count Matrices Derived from a Family of Negative Binomial Processes

no code implementations12 Apr 2014 Mingyuan Zhou, Oscar Hernan Madrid Padilla, James G. Scott

We define a family of probability distributions for random count matrices with a potentially unbounded number of rows and columns.

feature selection text-classification +1

False discovery rate regression: an application to neural synchrony detection in primary visual cortex

1 code implementation12 Jul 2013 James G. Scott, Ryan C. Kelly, Matthew A. Smith, Pengcheng Zhou, Robert E. Kass

But this may be inappropriate for many of today's large-scale screening problems, where auxiliary information about each test is often available, and where a combined analysis can lead to poorly calibrated error rates within different subsets of the experiment.

Methodology Applications

Expectation-maximization for logistic regression

no code implementations31 May 2013 James G. Scott, Liang Sun

We present a family of expectation-maximization (EM) algorithms for binary and negative-binomial logistic regression, drawing a sharp connection with the variational-Bayes algorithm of Jaakkola and Jordan (2000).

regression

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