- Distance Formula
- \text{Given points}A\left({x}_{\mathrm{a}},{y}_{\mathrm{a}}\right)\text{and}B\left({x}_{\mathrm{b}},{y}_{\mathrm{b}}\right)
- \text{Distance}d\text{between}A\text{and}B\text{defined as}
- d=\sqrt{{\left({x}_{\mathrm{b}}-{x}_{\mathrm{a}}\right)}^{2}+{\left({y}_{\mathrm{b}}-{y}_{\mathrm{a}}\right)}^{2}}

- Normalize years, so same photo dimensions
- Map coordinates for each face, in each year
- Calculate distance moved from one year to next
- 93 people identified in both 2012 and 2013 photo

- Median Distance Moved: 278 pixels

Top Stationary | |
---|---|

Paul Sieminski: | 22 pixels |

Philip Arthur Moore: | 24 pixels |

Paul Maiorana: | 38 pixels |

Top Movers | |
---|---|

Kevin Conboy: | 871 pixels |

Nikolay: | 863 pixels |

Westi: | 852 pixels |

Hard to tell, is this normal or not?

- Ran simulation of 10,000 Grand Meetup Photos, randomizing spots
- Average distance was 419 pixels moved
- Actual median distance moved 34% less than expected! So yes, likely a person tends to choose a similar spot.

Don't people line up by height, this is all bogus!?

Chairman of Height

- Median X Distance Moved: 269 pixels
- Simulation for X-Axis: 384 pixels
- Difference: 30%

People might have a tendency to stand in the same spot.

More analysis is needed. A spot may be determined by direction people fill in. Some might be consistently late and the closer spots are filled.

20 more years of photo analysis will help get statistical accuracy.

- Learned a bit of MathML for formula
- Played with Pandas and iPython Notebook
- Notebook Viewable online
- Played with D3.js to create simulation
- Studied everyone's faces in prep for meetup

Slides built in HTML using dzslides

All photos used without permission