Programing: R, (Python), C++, (Java), C, bash, awk, Perl, sh, (FORTRAN), Modula-2, Pascal, BASIC, Forth.

Text mark up: $\LaTeX$, $\TeX$, Quarto, Rmarkdown, markdown, HTML.

Revision control systems: git, svn, (cvs), rss.

Drafting: Inkscape, OpenSCAD, Adobe Illustrator.

Image/photography: Capture One, Helicon Focus, Lumariver Profile Designer, RawDigger, VueScan, LightRoom, Photoshop.

Video- and interactive tutorials: FlashBack Pro, R shiny.

WinEdt (for $\LaTeX$, $\TeX$, with embedded R code or not), RStudio (for R scripts, Quarto and Rmarkdown), GitKraken (for git).

ORCID profile: https://orcid.org/0000-0003-3385-972X

Web site for the book Learn R: As a Language.

The sources of the R packages I have published are in public Git repositories at GitHub. Out of the packages that I have authored and maintain, 15 are currently available through CRAN. The total number of package submissions (mostly updates) as author and maintainer is 244 since 2016-01-29.

I have published in CRAN one package update roughly every 15 days, or about 1.95 package updates per month, since 2016-01-29.

The most recent of these updates was published in CRAN on 2026-03-23.

plot of chunk cran-packages-plot

Updates under development are published at R-Universe as soon as merged or commited into the main branch in the repositories at GitHub. Two packages that depend on a commercial closed-source driver, but usable with a free runtime of the driver, are published only at R-Universe. Preliminary/experimental incomplete versions of a couple of new packages are already partly usable are also only at R-Universe and here in GitHub.

R-Universe profile: https://aphalo.r-universe.dev.

#> Warning in FUN(X[[i]], ...): incomplete final line found on
#> 'C:\Users\Aphalo\Documents/R-web-blog/r4p-blog/pages/is-this-a-polynomial.qmd'
#> Warning: 10 failed to parse.
#> Warning: 10 failed to parse.

The site R for Photobiology contains 101 posts and pages published since 2016-09-15! I have recently rebuilt the site using Quarto, and I have transferred only some of the posts originally published using WordPress. I am slowly adding more old posts, but only those that remain relevant. The figure below shows original publication date even when posts have been later updated. The source files are in a public repository at GitHub.

I have published one post or page roughly every days, or about 0.9 posts per month, since 2016-09-15.

I published the most recent post or page 25 days ago, and most recently updated a previously published one 13 days ago.

plot of chunk r4p-plot

The Photo Rumblings and Whispers has 35 posts since 2015-10-18! I have recently rebuilt the site using Quarto, and I have transferred most of the posts originally published using WordPress. I may add one or two old posts. The figure below shows original publication date even when posts and pages have been later updated. I have updated several of the posts and pages and I aim to continue updating them as needed. The source files are in a public repository at GitHub.

I have published one post or page roughly every days, or about 0.3 posts per month, since 2015-10-18.

I published the most recent post or page 339 days ago.

plot of chunk photo-plot

Updated 2026-05-07 21:21:16.01705

This README file is based on the blog post by Athanasia Mo Mowinckel and the R code by Martin Henze.