Martin Krzywinski / Genome Sciences Center / mkweb.bcgsc.ca Martin Krzywinski / Genome Sciences Center / mkweb.bcgsc.ca - contact me Martin Krzywinski / Genome Sciences Center / mkweb.bcgsc.ca on Twitter Martin Krzywinski / Genome Sciences Center / mkweb.bcgsc.ca - Lumondo Photography Martin Krzywinski / Genome Sciences Center / mkweb.bcgsc.ca - Pi Art Martin Krzywinski / Genome Sciences Center / mkweb.bcgsc.ca - Hilbertonians - Creatures on the Hilbert Curve
Lips that taste of tears, they say, are the best for kissing.Dorothy Parkerget crankymore quotes

laughter: exciting


UCD Computational and Molecular Biology Symposium, Dublin, Ireland. 1-2 Dec 2016.


fun + amusement

Dummer — Like Nothing Else


The Hummer font is a slightly modified Antique Olive Nord. The Like Nothing Else tag line is Trade Gothic. Both have character widths increased to 110-120% and individually adjusted kerning. Get the Illustrator CS5 file for both logos.

Martin Krzywinski @MKrzywinski mkweb.bcgsc.ca
Hummer logo. (EPS, PNG)
Martin Krzywinski @MKrzywinski mkweb.bcgsc.ca
Dummer logo. (EPS, PNG)
Download high-resolution images.

This project might give you the impression that I don't like Hummers. You'd be right.

Martin Krzywinski @MKrzywinski mkweb.bcgsc.ca
It could be worse. But not by much. (zoom)
Martin Krzywinski @MKrzywinski mkweb.bcgsc.ca
It could be worse. But not by much. (zoom)
Martin Krzywinski @MKrzywinski mkweb.bcgsc.ca
It could be worse. But not by much. (zoom)

update

The Maurauder. Over 25,000 lb — five times what an H3 weighs. Enough said.

Martin Krzywinski @MKrzywinski mkweb.bcgsc.ca
There is always someone with a bigger one. (Manufacturer's page.)

Dummer - Like Nothing Else

Hummers are a cultural equivalent of a toxic warning label and have the same effect on me as bug spray on mosquitoes.

I am not the first one to satirize this automotive aberration, so there's some hope.

Martin Krzywinski @MKrzywinski mkweb.bcgsc.ca
Dummer. Like Nothing Else. (New York Times — Laugh Lines)

GM's advertisement images require no modification for the satire, which makes it all that much better.

Martin Krzywinski @MKrzywinski mkweb.bcgsc.ca
Dumb and Dumber. (New York Times — Laugh Lines)

I could have just as well used the Lincoln Navigator or Cadillac Escalade, but they don't embody the superlative like the Hummer.

The Hummer brand proved itself to be aesthetically, rationally and economically unsustainable and collapsed after a failed attempt to sell it to China. There continues to be a robust market for used Hummers. Let the farce continue.

I'm hated

It delights me that this project produced my first hate mail.

I want to meet Doug and give him a hug for adding another dimension to this project.

I'm loved

The images got picked up by the New York Times laughlines blog, which drew a couple of fan mails.

But neither made me feel as good as Doug's email.

Dummer Images

Dummer. Like nothing else. A pretty good Hummer satire. / Martin Krzywinski @MKrzywinski mkweb.bcgsc.ca
Dummer. Like nothing else. (zoom)
Dummer. Like nothing else. A pretty good Hummer satire. / Martin Krzywinski @MKrzywinski mkweb.bcgsc.ca
Dummer. Like nothing else. (zoom)
Dummer. Like nothing else. A pretty good Hummer satire. / Martin Krzywinski @MKrzywinski mkweb.bcgsc.ca
Dummer. Like nothing else. (zoom)
Dummer. Like nothing else. A pretty good Hummer satire. / Martin Krzywinski @MKrzywinski mkweb.bcgsc.ca
Dummer. Like nothing else. (zoom)
Dummer. Like nothing else. A pretty good Hummer satire. / Martin Krzywinski @MKrzywinski mkweb.bcgsc.ca
Dummer. Like nothing else. (zoom)
Dummer. Like nothing else. A pretty good Hummer satire. / Martin Krzywinski @MKrzywinski mkweb.bcgsc.ca
Dummer. Like nothing else. (zoom)
Dummer. Like nothing else. A pretty good Hummer satire. / Martin Krzywinski @MKrzywinski mkweb.bcgsc.ca
Dummer. Like nothing else. (zoom)
Dummer. Like nothing else. A pretty good Hummer satire. / Martin Krzywinski @MKrzywinski mkweb.bcgsc.ca
Dummer. Like nothing else. (zoom)
Dummer. Like nothing else. A pretty good Hummer satire. / Martin Krzywinski @MKrzywinski mkweb.bcgsc.ca
Dummer. Like nothing else. (zoom)
VIEW ALL

news + thoughts

Regression diagnostics

Wed 11-05-2016

Residual plots can be used to validate assumptions about the regression model.

Continuing with our series on regression, we look at how you can identify issues in your regression model.

The difference between the observed value and the model's predicted value is the residual, `r = y_i - \hat{y}_i`, a very useful quantity to identify the effects of outliers and trends in the data that might suggest your model is inadequate.

Martin Krzywinski @MKrzywinski mkweb.bcgsc.ca
Nature Methods Points of Significance column: Regression diagnostics? (read)

We also discuss normal probability plots (or Q-Q plots) and show how these can be used to check that the residuals are normally distributed, which is one of the assumptions of regression (constant variance being another).

Background reading

Altman, N. & Krzywinski, M. (2016) Points of Significance: Analyzing outliers: Influential or nuisance? Nature Methods 13:281-282.

Altman, N. & Krzywinski, M. (2015) Points of Significance: Multiple Linear Regression Nature Methods 12:1103-1104.

Altman, N. & Krzywinski, M. (2015) Points of significance: Simple Linear Regression Nature Methods 12:999-1000.

...more about the Points of Significance column

Analyzing Outliers: Influential or Nuisance?

Fri 08-04-2016

Some outliers influence the regression fit more than others.

This month our column addresses the effect that outliers have on linear regression.

You may be surprised, but not all outliers have the same influence on the fit (e.g. regression slope) or inference (e.g. confidence or prediction intervals). Outliers with large leverage—points that are far from the sample average—can have a very large effect. On the other hand, if the outlier is close to the sample average, it may not influence the regression slope at all.

Martin Krzywinski @MKrzywinski mkweb.bcgsc.ca
Nature Methods Points of Significance column: Analyzing Outliers: Influential or Nuisance? (read)

Quantities such as Cook's distance and the so-called hat matrix, which defines leverage, are useful in assessing the effect of outliers.

Background reading

Altman, N. & Krzywinski, M. (2015) Points of Significance: Multiple Linear Regression Nature Methods 12:1103-1104.

Altman, N. & Krzywinski, M. (2015) Points of significance: Simple Linear Regression Nature Methods 12:999-1000.

...more about the Points of Significance column

Typographical posters of bird songs

Mon 28-03-2016

Chirp, chirp, chirp but much better looking.

Martin Krzywinski @MKrzywinski mkweb.bcgsc.ca
The song of the Northern Flicker, Black-capped Chickadee, Olive-sided Flycatcher and Red-eyed Vireo. Sweet to the eye and ear. (details)

If you like these, check out my other typographical art posters.

Happy 2016 Pi Day—gravity of `\pi`

Mon 14-03-2016

Celebrate `\\pi` Day (March 14th) with colliding digits in space. This year, I celebrate the detection of gravitational waves at the LIGO lab and simulate the effect of gravity on masses created from the digits of `\\pi`.

Martin Krzywinski @MKrzywinski mkweb.bcgsc.ca
1,000 digits of `\pi` under the influence of gravity. (details)

Some strange things can happen.

Martin Krzywinski @MKrzywinski mkweb.bcgsc.ca
44 digits of `\pi` under the influence of gravity. (details)

The art is featured in the Gravity of Pi article on the Scientific American SA Visual blog.

Check out art from previous years: 2013 `\\pi` Day and 2014 `\\pi` Day and 2015 `\\pi` Day.