City of Chicago – Library WiFi usage – Visualization

Let us examine a case of how a simple chart with few colors can give instant insight into the underlying data.

Here is the plain old table of data from City of Chicago

Let us see how we can analyze it in different ways.

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This simple line chart shows the growth of Library WiFi usage in 2013 compared to previous years. Notice the dip in 2013 during August timeframe.

Same data but different chart

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So which chart does a better justice?

And here is how the original data looks like

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https://data.cityofchicago.org/Education/Libraries-WiFi-Usage/vbts-zqt4

 

Finally, here is one extravagant option.

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