Yihui Xie 2/10/2026

R.I.P., Fritz Leisch

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Yihui Xie, creator of knitr, reflects on the passing of Fritz Leisch, the creator of Sweave. The article discusses Leisch's pioneering work in reproducible research with R, its influence on Xie's career and the development of knitr, and includes a personal apology for past criticisms. It is a technical reflection on a key figure in statistical computing.

R.I.P., Fritz Leisch

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