Toots for datavisFriendly@vis.social account

Written by Michael Friendly on 2025-01-20 at 03:39

[#]TodayinHistory #dataviz #Onthisday #OTD 📊

💀Jan 18, 1873 Baron Pierre Charles Dupin died in Paris, France 🇫🇷

1826: Choropleth map with shadings from black to white (distribution and intensity of illiteracy in France), the first (unclassed) choropleth map, and perhaps the first modern statistical map

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Written by Michael Friendly on 2025-01-15 at 03:29

[#]TodayinHistory #dataviz #Onthisday #OTD 📊

💀 Jan 14, 1742 Edmond Halley died in Greenwich, England 🏴󠁧󠁢󠁥󠁮󠁧󠁿

1701: Contour maps showing curves of equal value (an isogonic map, lines of equal magnetic declination for the world)

1715: Prediction of the path of a solar eclipse on May 3, 1715

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Written by Michael Friendly on 2024-10-23 at 22:33

Hi #rstats folks. I know many of you have moved here from the shitshow of X, but I still find the UI here and multiple federations either confusing or awkward to post (tiny box) or search.

I'll post here occasionally, but you can mostly find me at @datavisfriendly.bsky.social

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Written by Michael Friendly on 2024-10-11 at 01:03

[#]TodayinHistory #dataviz #Onthisday #OTD 📊

💀Oct 10, 1687 Johann Heinrich Schulze died in Germany 🇩🇪

1727: Experiments paving the way to the development of photography: 🎞️Images obtained by action of light on a mixture of chalk, nitric acid, and silver salts

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Written by Michael Friendly on 2024-10-10 at 00:57

⚾ Hey #rstats #baseball fans, the {Lahman} 📦now has a pkgdown documentation web site, https://cdalzell.github.io/Lahman 📊 💽

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Written by Michael Friendly on 2024-08-30 at 20:59

[#]rstats The matlib pkg implementation of LaTeX matrix operations and equations (in symbols or numbers)

is now getting to be full-featured: matrix arithmetic, transpose, inverse, partitioned matrices,

kronecker products, rbind/cbind, etc.

See the vignette, https://bit.ly/3yWluZf

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