Data Visualization

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# Data Visualization
## Invitation
### Andrew Irwin, <a href="mailto:a.irwin@dal.ca" class="email">a.irwin@dal.ca</a>
### Math & Stats, Dalhousie University
### 2021-01-06 (updated: 2021-01-01)

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# What is data visualization?

* Turn data into pictures

* Iterative process to explore data

* Filter, summarize, and present data

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# What is the purpose of data visualization?

* Summarize data compactly

* Leverage vision machinery in brain

* Helps you tell a story with data

* A familiar visualization tells a story "by itself"

???

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# What makes a good visualization?

* Effective communication aid

* Memorable & understandable

* Aesthetically pleasing - nothing jarring or out of place

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# Influential Visualizations

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<img src="../static/mlo_two_years.png" width="90%" style="display: block; margin: auto;" />

Source [co2.earth](https://www.co2.earth/daily-co2) and [sioweb.ucsd.edu](https://sioweb.ucsd.edu/programs/keelingcurve/)

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<img src="../static/mlo_full_record.png" width="90%" style="display: block; margin: auto;" />

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<div class="figure" style="text-align: center">
<img src="../static/gapminder-fertility-income.png" alt="Hans Rosling's visualizations from gapminder.org" width="90%" />
<p class="caption">Hans Rosling's visualizations from gapminder.org</p>
</div>

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<div class="figure" style="text-align: center">
<img src="../static/env-canada-halifax-snapshot.png" alt="Environment Canada weather forecast for Halifax NS, December 10, 2020" width="90%" />
<p class="caption">Environment Canada weather forecast for Halifax NS, December 10, 2020</p>
</div>

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<div class="figure" style="text-align: center">
<img src="../static/weatherspark-hfx-temperature.png" alt="Climatological mean daily high and low temperatures in Halifax NS from weatherspark.com" width="90%" />
<p class="caption">Climatological mean daily high and low temperatures in Halifax NS from weatherspark.com</p>
</div>

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# Suggested reading

* Course notes: Welcome

* Course notes: Invitation to Data Visualization

* Wilke: Chapter 29: Telling a story and making a point

* Video: Hans Rosling's TED talk (linked in "Invitation")

* Video: Excerpt from Claus Wilke's talk for the Santa Fe Institute (linked in "Invitation")

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# Task

* Prepare a short report on two visualizations you like or could improve on.

* Details in Course notes (Detailed outline, Evaluation)