Search Results for author: Toby Dylan Hocking

Found 11 papers, 10 papers with code

Cross-Validation for Training and Testing Co-occurrence Network Inference Algorithms

no code implementations26 Sep 2023 Daniel Agyapong, Jeffrey Ryan Propster, Jane Marks, Toby Dylan Hocking

Previous methods for evaluating the quality of the inferred network include using external data, and network consistency across sub-samples, both which have several drawbacks that limit their applicability in real microbiome composition data sets.

Optimizing ROC Curves with a Sort-Based Surrogate Loss Function for Binary Classification and Changepoint Detection

2 code implementations2 Jul 2021 Jonathan Hillman, Toby Dylan Hocking

ROC curves can also be used in other problems that have false positive and true positive rates such as changepoint detection.

Binary Classification

Increased peak detection accuracy in over-dispersed ChIP-seq data with supervised segmentation models

1 code implementation12 Dec 2020 Arnaud Liehrmann, Guillem Rigaill, Toby Dylan Hocking

We show that the unconstrained multiple changepoint detection model, with alternative noise assumptions and a suitable setup, reduces the over-dispersion exhibited by count data and turns out to detect peaks more accurately than algorithms which rely on these natural assumptions.

Labeled Optimal Partitioning

2 code implementations24 Jun 2020 Toby Dylan Hocking, Anuraag Srivastava

In partially labeled data, it is important to correctly predict presence/absence of changes in positive/negative labeled regions, in both the train and test sets.

Survival regression with accelerated failure time model in XGBoost

2 code implementations8 Jun 2020 Avinash Barnwal, Hyunsu Cho, Toby Dylan Hocking

In this work, we implement loss functions for learning accelerated failure time (AFT) models in XGBoost, to increase the support for survival modeling for different kinds of label censoring.

Management Marketing +1

Generalized Functional Pruning Optimal Partitioning (GFPOP) for Constrained Changepoint Detection in Genomic Data

4 code implementations29 Sep 2018 Toby Dylan Hocking, Guillem Rigaill, Paul Fearnhead, Guillaume Bourque

We describe a new algorithm and R package for peak detection in genomic data sets using constrained changepoint algorithms.

Computation

Fast Nonconvex Deconvolution of Calcium Imaging Data

1 code implementation21 Feb 2018 Sean Jewell, Toby Dylan Hocking, Paul Fearnhead, Daniela Witten

Calcium imaging data promises to transform the field of neuroscience by making it possible to record from large populations of neurons simultaneously.

Methodology Neurons and Cognition Applications

Maximum Margin Interval Trees

1 code implementation NeurIPS 2017 Alexandre Drouin, Toby Dylan Hocking, François Laviolette

Learning a regression function using censored or interval-valued output data is an important problem in fields such as genomics and medicine.

regression

A log-linear time algorithm for constrained changepoint detection

7 code implementations9 Mar 2017 Toby Dylan Hocking, Guillem Rigaill, Paul Fearnhead, Guillaume Bourque

This leads to a new algorithm which can solve problems with arbitrary affine constraints on adjacent segment means, and which has empirical time complexity that is log-linear in the amount of data.

Time Series Time Series Analysis

PeakSegJoint: fast supervised peak detection via joint segmentation of multiple count data samples

1 code implementation3 Jun 2015 Toby Dylan Hocking, Guillaume Bourque

To select the number of peaks in the segmentation, we propose a supervised penalty learning model.

Segmentation

Support vector comparison machines

3 code implementations30 Jan 2014 David Venuto, Toby Dylan Hocking, Lakjaree Sphanurattana, Masashi Sugiyama

In ranking problems, the goal is to learn a ranking function from labeled pairs of input points.

Learning-To-Rank

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