Speaker "Yang Wang" Details Back



Manifold: A Model-Agnostic Framework for Interpretation and Diagnosis of Machine Learning Models


Interpretation and diagnosis of machine learning models have gained renewed interest in recent years with breakthroughs in new approaches. We present Manifold, a framework that utilizes visual analysis techniques to support interpretation, debugging, and comparison of machine learning models in a more transparent and interactive manner. Conventional techniques usually focus on visualizing the internal logic of a specific model type (i.e., deep neural networks), lacking the ability to extend to a more complex scenario where different model types are integrated. To this end, Manifold is designed as a generic framework that does not rely on or access the internal logic of the model and solely observes the input (i.e., instances or features) and the output (i.e., the predicted result and probability distribution). We describe the workflow of Manifold as an iterative process consisting of three major phases that are commonly involved in the model development and diagnosis process: inspection (hypothesis), explanation (reasoning), and refinement (verification). The visual components supporting these tasks include a scatterplot-based visual summary that overviews the models' outcome and a customizable tabular view that reveals feature discrimination. We demonstrate current applications of the framework on the classification and regression tasks and discuss other potential machine learning use scenarios where Manifold can be applied.


Yang Wang is a Sr. Research Engineer leading the Machine Learning Visualization team at Uber. His research interests lie in Human-Computer Interaction and High-Performance Computing, specifically, methodologies and systems to model the Interpretability and Actionability of AI-aided decision-making processes. At Uber, Yang and team build ML infrastructures, publish & tech-transfer research papers, and work across business units to help Data Scientists, Engineers, and City-Ops accelerate their model iteration process. Besides his industrial job, Yang also provides academic services to multiple HCI and Machine Learning venues.