Martin Krzywinski / Canada's Michael Smith Genome Sciences Centre / mkweb.bcgsc.ca Martin Krzywinski / Canada's Michael Smith Genome Sciences Centre / mkweb.bcgsc.ca - contact me Martin Krzywinski / Canada's Michael Smith Genome Sciences Centre / mkweb.bcgsc.ca on Twitter Martin Krzywinski / Canada's Michael Smith Genome Sciences Centre / mkweb.bcgsc.ca - Lumondo Photography Martin Krzywinski / Canada's Michael Smith Genome Sciences Centre / mkweb.bcgsc.ca - Pi Art Martin Krzywinski / Canada's Michael Smith Genome Sciences Centre / mkweb.bcgsc.ca - Hilbertonians - Creatures on the Hilbert CurveMartin Krzywinski / Canada's Michael Smith Genome Sciences Centre / mkweb.bcgsc.ca - Pi Day 2020 - Piku
Sun is on my face ...a beautiful day without you.Royskoppbe apartmore quotes

pi day: exciting


Scientific graphical abstracts — design guidelines


visualization + design


`\pi` Day 2021 Art Posters - A forest of Pi (a Lindenmayer system)
 / Martin Krzywinski @MKrzywinski mkweb.bcgsc.ca buy artwork
81 digits of `\pi` as a forest of trees: standard, bat cave and underwater editions. ( BUY ARTWORK )
Martin Krzywinski @MKrzywinski mkweb.bcgsc.ca
The 2021 Pi Day art celebrates the digits of `\pi` with a forest! Visit the bat cave and underwater ecosystems for the full experience.

`\pi` Day 2019 Art Posters - Digits, internationally.


Pi Day 2019 Art Posters  - Digits, internationally.
 / Martin Krzywinski @MKrzywinski mkweb.bcgsc.ca
2021 `\pi` reminds us that good things grow for those who wait.' edition.

Pi Day 2019 Art Posters  - Digits, internationally.
 / Martin Krzywinski @MKrzywinski mkweb.bcgsc.ca
2019 `\pi` has hundreds of digits, hundreds of languages and a special kids' edition.

Pi Day 2019 Art Posters  - Digits, internationally.
 / Martin Krzywinski @MKrzywinski mkweb.bcgsc.ca
2018 `\pi` day stitches street maps into new destinations.

Pi Day 2019 Art Posters  - Digits, internationally.
 / Martin Krzywinski @MKrzywinski mkweb.bcgsc.ca
2017 `\pi` day imagines the sky in a new way.


Pi Day 2019 Art Posters  - Digits, internationally.
 / Martin Krzywinski @MKrzywinski mkweb.bcgsc.ca
2016 `\pi` approximation day wonders what would happen if about right was right.

Pi Day 2019 Art Posters  - Digits, internationally.
 / Martin Krzywinski @MKrzywinski mkweb.bcgsc.ca
2016 `\pi` day sees digits really fall for each other.

Pi Day 2019 Art Posters  - Digits, internationally.
 / Martin Krzywinski @MKrzywinski mkweb.bcgsc.ca
2015 `\pi` day maps transcendentally.

Pi Day 2019 Art Posters  - Digits, internationally.
 / Martin Krzywinski @MKrzywinski mkweb.bcgsc.ca
2014 `\pi` approx day spirals into roughness.


Pi Day 2019 Art Posters  - Digits, internationally.
 / Martin Krzywinski @MKrzywinski mkweb.bcgsc.ca
2014 `\pi` day hypnotizes you into looking.

Pi Day 2019 Art Posters  - Digits, internationally.
 / Martin Krzywinski @MKrzywinski mkweb.bcgsc.ca
2014 `\pi` day

Pi Day 2019 Art Posters  - Digits, internationally.
 / Martin Krzywinski @MKrzywinski mkweb.bcgsc.ca
2013 `\pi` day is where it started

Pi Day 2019 Art Posters  - Digits, internationally.
 / Martin Krzywinski @MKrzywinski mkweb.bcgsc.ca
Circular `\pi` art and other distractions

On March 14th celebrate `\pi` Day. Hug `\pi`—find a way to do it.

For those who favour `\tau=2\pi` will have to postpone celebrations until July 26th. That's what you get for thinking that `\pi` is wrong. I sympathize with this position and have `\tau` day art too!

If you're not into details, you may opt to party on July 22nd, which is `\pi` approximation day (`\pi` ≈ 22/7). It's 20% more accurate that the official `\pi` day!

Finally, if you believe that `\pi = 3`, you should read why `\pi` is not equal to 3.

Martin Krzywinski @MKrzywinski mkweb.bcgsc.ca
Most of the art is available for purchase as framed prints and, yes, even pillows. Sleep's never been more important — I take custom requests.

How many ages hence
Shall this our lofty scene be acted over
In states unborn and accents yet unknown!
—Willian Shakespeare (Julius Caesar, Act III, Scene 1)

Welcome to this year's celebration of `\pi` and mathematics.

The theme this year is typographical and pure—in contrast to last year's extremely elaborate computational art. This year is also the first time I have made a special kids' edition!

This year's poem is by Viorica Hrincu and it is about complications.

This year's `\pi` day song is Tshinanu by Kashtin.

If you enjoy art based on type, explore my other typographical works.

`\pi` day — kids edition!

Several teachers have reached out to me in the past and asked for art to hang in their classrooms. So I thought what better way to get kids excited and talking (and reading) about math than with an explosion of colors and phat fonts.

Martin Krzywinski @MKrzywinski mkweb.bcgsc.ca
Just for kids: 127 digits of `\pi` in English. (zoom)
Martin Krzywinski @MKrzywinski mkweb.bcgsc.ca
Just for kids: 116 digits of `\pi` in 64 languages. (zoom)

The international kids' poster uses the following languages: Afrikaans, Albanian, Azerbaijani, Basque, Catalan, Cebuano, Corsican, Croatian, Danish, Dothraki, Dutch, English, Esperanto, Estonian, Finnish, French, Frisian, Galician, German, Gongduk, Haitian/Creole, Hausa, Hawaiian, Huastec/Mayan, Icelandic, Indonesian, Irish, Italian, Khasi, Ladan, Latin, Latvian, Lithuanian, Luxembourgish, Malagasy, Maltese, Maori, Nao, Norwegian, Polish, Portuguese, Puyuma, Ro, Samoan, Scots/Gaelic, Sesotho, Shona, Slovak, Slovenian, Solon, Solresol, Somali, Spanish, Swahili, Swedish, Tagalog, Tenerife, Tetun, Turkish, Welsh, Xhosa, Yoruba, Zenaga, and Zulu.

Some of these languages are fictional or engineered—I'll leave it to you to find them.

Martin Krzywinski @MKrzywinski mkweb.bcgsc.ca
Just for kids: 116 digits of `\pi` in 64 languages. (zoom)
Martin Krzywinski @MKrzywinski mkweb.bcgsc.ca
Just for kids: 116 digits of `\pi` in 64 languages. (zoom)
Martin Krzywinski @MKrzywinski mkweb.bcgsc.ca
Just for kids: 116 digits of `\pi` in 64 languages. (zoom)
Martin Krzywinski @MKrzywinski mkweb.bcgsc.ca
Just for kids: 116 digits of `\pi` in 64 languages. (zoom)

The posters read out the digits of `\pi` in a variety of languages. For this version of the art, I've selected language digit words that have no diacritical marks—to fit the letters more tightly.

for everybody

Adults shouldn't feel left out—they're free to enjoy the `\pi` Day kids' editions (I know I want to).

However, for the more discerning typographer in you (if Granby Elephant is too bloated for your eyes), I have prepared something slimmer.

These posters spell out the digits of `\pi` in a variety of languages and alphabets. I'll leave you to work out the rule for the red highlights.

The following languages are used: Afrikaans, Ainu, Albanian, Amharic, Arabic, Armenian, Avestan, Azerbaijani, Balinese, Banjar, Bengali, Biblical Arameic, Buginese, Bulgarian, Bumthang, Catalan, Cherokee, Chinese, Cia-cia, Coptic, Czech, Danish, Dothraki, English, Esperanto, Etruscan, Frisian, Galician, Gaulish, Georgian, Georgian Old, Gothic, Greek Old, Gujarati, Hebrew, Hindi, Hopi, Hungarian, Igbo, Inuktitut, Irish, Japanese Sino, Javanese, Kannada, Kazakh, Khmer, Klallam, Korean, Korean Sino, Kyrgyz, Ladan, Ladino, Lao, Latvian, Macedonian, Malagasy, Malay, Malayalam, Mandaic, Mongolian Classical, Myanmar, Norse, Norwegian, Old English, Old Turkic, Pashto, Persian, Phoenician, Proto Germanic, Punjabi, Ro, Romanian, Samaritan, Samoan, Sanskrit, Sesotho, Sindhi, Sinhala, Slavonic, Slovak, Slovenian, Spanish, Sundanese, Swahili, Swedish, Sylheti, Syriac, Tajik, Telugu, Tetun, Thai, Thompson, Turkish, Ugaritic, Urdu, Welsh, Wyandot, Xhosa, Yi, Yiddish, and Yonaguni.

Martin Krzywinski @MKrzywinski mkweb.bcgsc.ca
For everybody: 223 digits of `\pi` in 102 languages. (zoom)
Martin Krzywinski @MKrzywinski mkweb.bcgsc.ca
For everybody: 351 digits of `\pi` in+ 54 languages. (zoom)

The typeface is Helvetica Neue or Noto Sans.

In another version of the poster, instead of using words to spell out the digits, I use digit glyphs from various alphabets. Included in this version are also any single-glyph words for the digit.

The digit glyph poster uses Adlam, Ainu, Arabic, Balinese, Bengali, Brahmi, Burmese, Chakma, Cham, Chinese, Coptic, Ethiopic, Gujaranti, Gujarati, Gurmukhi, Hebrew, Japanese Sino, Javanese, Kannada, Kayahli, Kharoshthi, Khmer, Klingon, Korean, Koreansino, Lao, Lepcha, Limbu, Malayalam, Meetei Mayek, Mongolian, Nko, Odia, Olchiki, Oriya, Osmanya, Punjabi, Roman, Rumi, Sanskrit, Saurashtra, Shan, Sinhala, Sinhala Archaic, Sumerian, Sundanese, Tamil, Telugu, Thai, Tibetan, Vai, Yi, and Yonaguni.

Martin Krzywinski @MKrzywinski mkweb.bcgsc.ca
For everybody: 351 digits of `\pi` in 54 alphabets. (zoom)

VIEW ALL

news + thoughts

Happy 2021 `\pi` Day—
A forest of digits

Sun 14-03-2021

Celebrate `\pi` Day (March 14th) and finally see the digits through the forest.

Martin Krzywinski @MKrzywinski mkweb.bcgsc.ca
The 26th tree in the digit forest of `\pi`. Why is there a flower on the ground?. (details)

This year is full of botanical whimsy. A Lindenmayer system forest – deterministic but always changing. Feel free to stop and pick the flowers from the ground.

Martin Krzywinski @MKrzywinski mkweb.bcgsc.ca
The first 46 digits of `\pi` in 8 trees. There are so many more. (details)

And things can get crazy in the forest.

Martin Krzywinski @MKrzywinski mkweb.bcgsc.ca
A forest of the digits of '\pi`, by ecosystem. (details)

Check out art from previous years: 2013 `\pi` Day and 2014 `\pi` Day, 2015 `\pi` Day, 2016 `\pi` Day, 2017 `\pi` Day, 2018 `\pi` Day and 2019 `\pi` Day.

Testing for rare conditions

Tue 16-03-2021

All that glitters is not gold. —W. Shakespeare

The sensitivity and specificity of a test do not necessarily correspond to its error rate. This becomes critically important when testing for a rare condition — a test with 99% sensitivity and specificity has an even chance of being wrong when the condition prevalence is 1%.

We discuss the positive predictive value (PPV) and how practices such as screen can increase it.

Martin Krzywinski @MKrzywinski mkweb.bcgsc.ca
Nature Methods Points of Significance column: Testing for rare conditions. (read)

Altman, N. & Krzywinski, M. (2021) Points of significance: Testing for rare conditions. Nature Methods 18

Standardization fallacy

Tue 09-02-2021

We demand rigidly defined areas of doubt and uncertainty! —D. Adams

A popular notion about experiments is that it's good to keep variability in subjects low to limit the influence of confounding factors. This is called standardization.

Unfortunately, although standardization increases power, it can induce unrealistically low variability and lead to results that do not generalize to the population of interest. And, in fact, may be irreproducible.

Martin Krzywinski @MKrzywinski mkweb.bcgsc.ca
Nature Methods Points of Significance column: Standardization fallacy. (read)

Not paying attention to these details and thinking (or hoping) that standardization is always good is the "standardization fallacy". In this column, we look at how standardization can be balanced with heterogenization to avoid this thorny issue.

Voelkl, B., Würbel, H., Krzywinski, M. & Altman, N. (2021) Points of significance: Standardization fallacy. Nature Methods 18:5–6.

Graphical Abstract Design Guidelines

Fri 13-11-2020

Clear, concise, legible and compelling.

Making a scientific graphical abstract? Refer to my practical design guidelines and redesign examples to improve organization, design and clarity of your graphical abstracts.

Martin Krzywinski @MKrzywinski mkweb.bcgsc.ca
Graphical Abstract Design Guidelines — Clear, concise, legible and compelling.

"This data might give you a migrane"

Tue 06-10-2020

An in-depth look at my process of reacting to a bad figure — how I design a poster and tell data stories.

Martin Krzywinski @MKrzywinski mkweb.bcgsc.ca
A poster of high BMI and obesity prevalence for 185 countries.

He said, he said — a word analysis of the 2020 Presidential Debates

Thu 01-10-2020

Building on the method I used to analyze the 2008, 2012 and 2016 U.S. Presidential and Vice Presidential debates, I explore word usagein the 2020 Debates between Donald Trump and Joe Biden.

Martin Krzywinski @MKrzywinski mkweb.bcgsc.ca
Analysis of word usage by parts of speech for Trump and Biden reveals insight into each candidate.