News
2022-05-04 - Time to Vote: Temporal Clustering of User Activity on Stack Overflow
A new paper of mine (coauthors: Agnieszka Geras, Grzesiek Siudem) will appear in the Journal of the Association for Information Science and Technology.
2022-04-12 - Minimalist Data Wrangling with Python
I’ve made a first draft of my new textbook on data wrangling with Python publicly available today.
2022-03-15 - Ockham’s Index of Scientific Impact
A new paper of mine (co-authored by Basia Żogała-Siudem, Grzesiek Siudem, and Ania Cena) will appear in Scientometrics (doi:10.1007/s11192-022-04345-2)
2022-02-26 - Validating Citation Models by Proxy Indices
Accepted for publication in Journal of Informetrics: a new paper by Ania Cena, Basia Żogała-Siudem, Grzesiek Siudem, and yours truly (doi:10.1016/j.joi.2022.101267).
2022-02-19 - Ministry of Education and Science Award
Together with a number of excellent colleagues, I have received the Ministry of Education and Science, Poland, award for significant achievements in teaching, for the design and implementation of a new innovative course of study – Master of Data Science – at the Faculty of Mathematics and Information Science, Warsaw University of Technology.
2022-02-04 - Invited Lecture at FSTA 2022
I’m giving (online…) an invited lecture at FSTA 2022 today entitled Clustering and aggregation, where we will examine a few scenarios where aggregation methods can aid in the construction, analysis, and evaluation of tools related to data clustering, including linkage criteria, partition similarity measures, and cluster validity indices. We’ll also indicate some noteworthy challenges for both theoretical and practical future research endeavours.
2021-10-08 - Homepage Rewrite
My website is now generated with Sphinx.
2021-10-06 - Are Cluster Validity Measures (In)valid?
To appear in Information Sciences — a paper coauthored by Maciek Bartoszuk and Ania Cena (doi:10.1016/j.ins.2021.10.004).
2021-09-27 - Paper on stringi
A paper on my stringi package has been accepted for publication in Journal of Statistical Software (preprint).
2021-08-26 - T-norms or t-conorms? How to aggregate similarity degrees for plagiarism detection
A new paper by Maciek Bartoszuk and me is to appear in Knowledge-Based Systems (doi:10.1016/j.knosys.2021.107427).
2021-07-29 - stringx: Drop-in replacements for base R string functions powered by stringi
English is the native language for only 5% of the World population. Also, only 17% of us can understand this text. Moreover, the Latin alphabet is the main one for merely 36% of the total. The early computer era, now a very long time ago, was dominated by the US. Due to the proliferation of the internet, smartphones, social media, and other technologies and communication platforms, this is no longer the case. The stringx package replaces base R string functions (such as
grep(),tolower(), andsprintf()) with ones that fully support the Unicode standards related to natural language processing, fixes some long-standing inconsistencies, and introduces some new, useful features. Thanks to ICU (International Components for Unicode) and stringi, they are fast, reliable, and portable across different platforms. Now available from CRAN.2021-07-14 - stringi 1.7.2
Another major update of stringi brings a rewritten version of
stri_sprintf, support for custom rule-based transliteration, extraction of named regex capture groups, and many other enhancements.2021-06-17 - realtest 0.2.1 on CRAN
An update to realtest is now available.
2021-06-04 - realtest: When Expectations Meet Reality: Realistic Unit Testing in R
realtest is a framework for unit testing for realistic minimalists, where we distinguish between expected, acceptable, current, fallback, ideal, or regressive behaviour. It can also be used for monitoring other software projects for changes. Now available on CRAN.
2021-05-27 - Paper on the genieclust Python+R package
genieclust: Fast and robust hierarchical clustering was accepted for publication in SoftwareX (doi:10.1016/j.softx.2021.100722).