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Multitask Modeling with Confidence Using Matrix Factorization and Conformal Prediction
Stockholm University, Faculty of Social Sciences, Department of Computer and Systems Sciences. Karolinska Institutet, Sweden.ORCID iD: 0000-0003-3107-331X
Number of Authors: 22019 (English)In: Journal of Chemical Information and Modeling, ISSN 1549-9596, E-ISSN 1549-960X, Vol. 59, no 4, p. 1598-1604Article in journal (Refereed) Published
Abstract [en]

Multitask prediction of bioactivities is often faced with challenges relating to the sparsity of data and imbalance between different labels. We propose class conditional (Mondrian) conformal predictors using underlying Macau models as a novel approach for large scale bioactivity prediction. This approach handles both high degrees of missing data and label imbalances while still producing high quality predictive models. When applied to ten assay end points from PubChem, the models generated valid models with an efficiency of 74.0-80.1% at the 80% confidence level with similar performance both for the minority and majority class. Also when deleting progressively larger portions of the available data (0-80%) the performance of the models remained robust with only minor deterioration (reduction in efficiency between 5 and 10%). Compared to using Macau without conformal prediction the method presented here significantly improves the performance on imbalanced data sets.

Place, publisher, year, edition, pages
2019. Vol. 59, no 4, p. 1598-1604
National Category
Chemical Sciences Pharmacology and Toxicology Bioinformatics and Systems Biology Computer Sciences
Identifiers
URN: urn:nbn:se:su:diva-169059DOI: 10.1021/acs.jcim.9b00027ISI: 000465644500030PubMedID: 30908915OAI: oai:DiVA.org:su-169059DiVA, id: diva2:1318345
Available from: 2019-05-27 Created: 2019-05-27 Last updated: 2019-05-27Bibliographically approved

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Norinder, UlfSvensson, Fredrik
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