# Leland Wilkinson

> American statistician

**Wikidata**: [Q6520814](https://www.wikidata.org/wiki/Q6520814)  
**Wikipedia**: [English](https://en.wikipedia.org/wiki/Leland_Wilkinson)  
**Source**: https://4ort.xyz/entity/leland-wilkinson

## Summary
Leland Wilkinson was an American statistician and computer scientist best known for developing the SYSTAT statistical software and authoring *The Grammar of Graphics*, a foundational work in data visualization. A Fellow of the American Statistical Association and the American Association for the Advancement of Science, he shaped modern statistical graphics and influenced tools like Tableau and ggplot2.

## Biography
- **Born**: November 5, 1944, in New York City  
- **Died**: December 10, 2021, in Lake Forest  
- **Nationality**: United States  
- **Education**: PhD in Psychology (Yale University, 1975), Harvard University, Harvard Divinity School, Trinity-Pawling School  
- **Known for**: Creating SYSTAT and *The Grammar of Graphics*  
- **Employer(s)**: University of Illinois Chicago, Tableau Software, H2O.ai  
- **Field(s)**: Statistics, computer graphics  

## Contributions
Leland Wilkinson developed **SYSTAT**, a widely used statistics and statistical graphics software package, in the 1970s. His 1999 book *The Grammar of Graphics* established a systematic framework for data visualization, influencing tools such as ggplot2 and Tableau. At Tableau Software, he contributed to advancing interactive data visualization, and at H2O.ai, he worked on machine learning interpretability. His work bridged statistics, computer science, and graphic design, emphasizing clarity and rigor in visual communication. The Grammar of Graphics remains a cornerstone of data visualization theory, enabling standardized and reproducible graphical methods.

## FAQs
### Q: What is Leland Wilkinson best known for?  
A: He created the SYSTAT statistical software and authored *The Grammar of Graphics*, a seminal book that systematized data visualization principles.  

### Q: When did Leland Wilkinson die?  
A: He died on December 10, 2021, in Lake Forest.  

### Q: What companies did Leland Wilkinson work for?  
A: He was employed by the University of Illinois Chicago, Tableau Software, and H2O.ai.  

## Why They Matter
Leland Wilkinson’s work revolutionized how data is visualized and analyzed. *The Grammar of Graphics* provided a universal language for constructing graphics, democratizing complex statistical concepts for broader application. His development of SYSTAT empowered researchers with accessible statistical tools, while his contributions to Tableau and H2O.ai advanced interactive visualization and machine learning. Without Wilkinson, the field of data science would lack critical foundational frameworks, and tools like ggplot2 and Tableau might not exist in their current form. His interdisciplinary approach continues to influence academia, industry, and open-source communities.

## Notable For
- Creator of the SYSTAT statistical software.  
- Author of *The Grammar of Graphics* (1999).  
- Fellow of the American Statistical Association (1998) and the American Association for the Advancement of Science (2008).  
- Contributed to Tableau Software and H2O.ai.  

## Body
### Early Life and Education  
Wilkinson was born on November 5, 1944, in New York City. He earned a PhD in Psychology from Yale University in 1975 and studied at Harvard University and Harvard Divinity School.  

### Career  
- **Academia**: Taught at the University of Illinois Chicago.  
- **Industry**: Worked at Tableau Software and H2O.ai, focusing on visualization and machine learning.  
- **Advisors**: His doctoral advisor was Robert P. Abelson.  

### Major Works  
- **SYSTAT**: Developed in the 1970s, this software became a standard tool for statistical analysis and graphics.  
- ***The Grammar of Graphics*** (1999): Introduced a structured approach to visualization, defining rules for creating graphs from data.  
- **Patents and Tools**: Contributed to patents and systems for interactive visualization and statistical modeling.  

### Death and Legacy  
Wilkinson died on December 10, 2021, in Lake Forest. His legacy includes the widespread adoption of SYSTAT, the enduring influence of *The Grammar of Graphics*, and advancements in interactive data tools. His work remains essential in statistics, computer science, and data journalism.

## References

1. Virtual International Authority File
2. [Source](https://psychology.yale.edu/graduate/history/psychology-dept-phd-graduates)
3. Czech National Authority Database
4. [Source](https://web.archive.org/web/20210117180942/https://www.cs.uic.edu/~wilkinson/)
5. [Source](https://h2o.ai/leland/)
6. Fellows of the American Statistical Association database
7. [Source](https://www.aaas.org/fellows/historic?field_last_name_value=All&field_year_elected=2008&page=18)
8. Mathematics Genealogy Project
9. International Standard Name Identifier
10. CiNii Research
11. SNAC
12. [Source](https://flowingdata.com/2021/12/13/leland-wilkinson-creator-of-the-grammar-of-graphics-passed-away/)
13. IdRef