Search Results for author: Peter J. Bickel

Found 13 papers, 2 papers with code

Sparse Canonical Correlation Analysis via Concave Minimization

no code implementations17 Sep 2019 Omid S. Solari, James B. Brown, Peter J. Bickel

We also introduceDirected Sparse CCA, which is able to find associations which are aligned with a specified experiment design, andMulti-View sCCA which is used to discover associations between multiple sets of covariates.

Computational Efficiency

Hierarchical community detection by recursive partitioning

no code implementations2 Oct 2018 Tianxi Li, Lihua Lei, Sharmodeep Bhattacharyya, Koen Van den Berge, Purnamrita Sarkar, Peter J. Bickel, Elizaveta Levina

This can be done with a simple top-down recursive partitioning algorithm, starting with a single community and separating the nodes into two communities by spectral clustering repeatedly, until a stopping rule suggests there are no further communities.

Clustering Community Detection +1

Network modelling of topological domains using Hi-C data

2 code implementations30 Jul 2017 Y. X. Rachel Wang, Purnamrita Sarkar, Oana Ursu, Anshul Kundaje, Peter J. Bickel

However, one of the drawbacks of community detection is that most methods take exchangeability of the nodes in the network for granted; whereas the nodes in this case, i. e. the positions on the chromosomes, are not exchangeable.

Applications Genomics

Meta-learners for Estimating Heterogeneous Treatment Effects using Machine Learning

6 code implementations12 Jun 2017 Sören R. Künzel, Jasjeet S. Sekhon, Peter J. Bickel, Bin Yu

There is growing interest in estimating and analyzing heterogeneous treatment effects in experimental and observational studies.

Statistics Theory Methodology Statistics Theory

Spectral Clustering and Block Models: A Review And A New Algorithm

no code implementations7 Aug 2015 Sharmodeep Bhattacharyya, Peter J. Bickel

We focus on spectral clustering of unlabeled graphs and review some results on clustering methods which achieve weak or strong consistent identification in data generated by such models.

Clustering Image Clustering

Hypothesis Testing for Automated Community Detection in Networks

no code implementations12 Nov 2013 Peter J. Bickel, Purnamrita Sarkar

Community detection in networks is a key exploratory tool with applications in a diverse set of areas, ranging from finding communities in social and biological networks to identifying link farms in the World Wide Web.

Clustering Community Detection +1

Role of normalization in spectral clustering for stochastic blockmodels

no code implementations5 Oct 2013 Purnamrita Sarkar, Peter J. Bickel

The quality of spectral clustering is closely tied to the convergence properties of these principal eigenvectors.

Clustering

Pseudo-likelihood methods for community detection in large sparse networks

no code implementations10 Jul 2012 Arash A. Amini, Aiyou Chen, Peter J. Bickel, Elizaveta Levina

Many algorithms have been proposed for fitting network models with communities, but most of them do not scale well to large networks, and often fail on sparse networks.

Clustering Community Detection +1

The method of moments and degree distributions for network models

no code implementations23 Feb 2012 Peter J. Bickel, Aiyou Chen, Elizaveta Levina

Probability models on graphs are becoming increasingly important in many applications, but statistical tools for fitting such models are not yet well developed.

Statistics Theory Statistics Theory

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