I am an assistant professor in the Department of Computer Science at University of Maryland, College Park. I direct the Human-Data Interaction Research Group, whose mission is to support interactive data analysis and visual data communication through human-centered techniques and systems.


Featured Projects

Data Illustrator
augmenting vector drawing tools with lazy data binding to author expressive visualizations
querying big data in real-time through data tile precomputation & parallel processing on GPU
managing ambiguity in natural language interfaces for data visualization
interweaving querying & pattern mining for recursive exploration
mining & visualizing branching patterns in event sequences
Patterns and Sequences
exploring clickstreams at multiple levels of granularity


  • Department of Computer Science
  • Brendan Iribe Center for Computer Science and Engineering
  • University of Maryland
  • 8125 Paint Branch Drive
  • College Park, MD 20742

Email: leozcliu at umd.edu
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  • June '23, EuroVis, Leipzig
  • April '23, Boston