Automatic Componentwise Boosting: An Interpretable AutoML System

• URL: http://arxiv.org/abs/2109.05583v1
• Date: Sun, 12 Sep 2021 18:34:33 GMT
• Title: Automatic Componentwise Boosting: An Interpretable AutoML System
• Authors: Stefan Coors and Daniel Schalk and Bernd Bischl and David R\"ugamer
• Abstract summary: We propose an AutoML system that constructs an interpretable additive model that can be fitted using a highly scalable componentwise boosting algorithm. Our system provides tools for easy model interpretation such as visualizing partial effects and pairwise interactions. Despite its restriction to an interpretable model space, our system is competitive in terms of predictive performance on most data sets.
• Score: 1.1709030738577393
• License: http://creativecommons.org/licenses/by/4.0/
• Abstract: In practice, machine learning (ML) workflows require various different steps, from data preprocessing, missing value imputation, model selection, to model tuning as well as model evaluation. Many of these steps rely on human ML experts. AutoML - the field of automating these ML pipelines - tries to help practitioners to apply ML off-the-shelf without any expert knowledge. Most modern AutoML systems like auto-sklearn, H20-AutoML or TPOT aim for high predictive performance, thereby generating ensembles that consist almost exclusively of black-box models. This, in turn, makes the interpretation for the layperson more intricate and adds another layer of opacity for users. We propose an AutoML system that constructs an interpretable additive model that can be fitted using a highly scalable componentwise boosting algorithm. Our system provides tools for easy model interpretation such as visualizing partial effects and pairwise interactions, allows for a straightforward calculation of feature importance, and gives insights into the required model complexity to fit the given task. We introduce the general framework and outline its implementation autocompboost. To demonstrate the frameworks efficacy, we compare autocompboost to other existing systems based on the OpenML AutoML-Benchmark. Despite its restriction to an interpretable model space, our system is competitive in terms of predictive performance on most data sets while being more user-friendly and transparent.

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