QUESTO: Interactive Construction of Objective Functions for Classification Tasks

Building effective classifiers requires providing the modeling algorithms with information about the training data and modeling goals in order to create a model that makes proper tradeoffs. Machine learning algorithms allow for flexible specification of such meta‐information through the design of th...

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Bibliographic Details
Published in:Computer graphics forum Vol. 39; no. 3; pp. 153 - 165
Main Authors: Das, Subhajit, Xu, Shenyu, Gleicher, Michael, Chang, Remco, Endert, Alex
Format: Journal Article
Language:English
Published: Oxford Blackwell Publishing Ltd 01.06.2020
Subjects:
Algorithms
CCS Concepts
Classification
Computing methodologies → Model construction and selection
Human‐centered computing → Visual analytics
Machine learning
Machine learning task → Classification
Mathematics of computing → Interactive objective functions
Specifications
User satisfaction
ISSN:0167-7055, 1467-8659
Online Access:Get full text
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Summary:Building effective classifiers requires providing the modeling algorithms with information about the training data and modeling goals in order to create a model that makes proper tradeoffs. Machine learning algorithms allow for flexible specification of such meta‐information through the design of the objective functions that they solve. However, such objective functions are hard for users to specify as they are a specific mathematical formulation of their intents. In this paper, we present an approach that allows users to generate objective functions for classification problems through an interactive visual interface. Our approach adopts a semantic interaction design in that user interactions over data elements in the visualization are translated into objective function terms. The generated objective functions are solved by a machine learning solver that provides candidate models, which can be inspected by the user, and used to suggest refinements to the specifications. We demonstrate a visual analytics system QUESTO for users to manipulate objective functions to define domain‐specific constraints. Through a user study we show that QUESTO helps users create various objective functions that satisfy their goals.
Bibliography:ObjectType-Article-1
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ISSN:0167-7055
1467-8659
DOI:10.1111/cgf.13970