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By adding transitions, we can more easily follow the elements as they are entered, updated and exited. Separate transitions are defined for each of the three states.

Note that no transition is applied to the merged enter + update selection; this is because it would supersede the transition already scheduled on entering and updating elements. It's possible to schedule concurrent elements by using transition.transition or by setting, but it's simpler here to only transition the x-position on update; for entering elements, the x-position is assigned statically.

Want to read more? Try these tutorials:

View index.html
<!DOCTYPE html>
<meta charset="utf-8">
.q0-11 {fill: rgb(215, 48, 39);}
.q1-11 {fill: rgb(244, 109, 67);}
.q2-11 {fill: rgb(253, 174, 97);}
.q3-11 {fill: rgb(254, 224, 144);}
1wheel /
Last active Aug 22, 2016 — forked from mbostock/



Underscore example:

_.each([1, 2, 3], function(num) { alert(num); });
1wheel /
Last active Aug 22, 2016

Is there a way to prevent the two subsequent odd-numbered days at the end of each year from generating adjacent ticks? In this case I would prefer a tick at Dec 29, Dec 31, Jan 2, Jan 4, etc.

1wheel / MIT-License
Last active Mar 19, 2017 — forked from rwaldron/MIT-License
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Copyright 2017, Adam Pearce
MIT License,
1wheel /
Last active Apr 16, 2018 — forked from mbostock/.block
Screen Recording to GIF
  1. If you haven’t already: brew install ffmpeg gifsicle imagemagick.
  2. Open QuickTime Player.
  3. File > New Screen Recording.
  4. Record.
  5. Save as
    ffmpeg -i -r 24 recording-%03d.png &&
    convert recording-001.png palette.gif && 
    convert -dither none -remap palette.gif recording-*.png recording-uncompressed.gif &&