sgazziano@johncabot.edu

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CS 101 Sect 8 – Data Presentation

This is the original "Chinese proverb" from the streetcar advertisement.

The quotation has wrongly been translated as: A Picture Is Worth One Thousand Words.

In fact, the literal translation is: A Picture's Meaning Can Express Ten Thousand Words.

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2

Data presentation – the seminal book by Tufte

The Princeton lessons, 1975

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3

Data Presentation – Napoleon march on Moscow

The French Invasion of Russia (Russian: Отечественная война 1812 года) began on 24 June 1812 when Napoleon's Grande Armée crossed the Neman River in an attempt to engage and defeat the Russian army. The Grande Armée was a very large force, numbering approximately half a million men. When the remnants of Napoleon's army crossed the Berezina River retiring in November, only 27,000 fit soldiers remained; the Grand Armée had lost some 380,000 men dead and 100,000 captured.

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4

Data presentation - one more example

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5

From data to picture: data visualization

We will follow Chap 4 of ”Head First Data Analysis: A learner's guide to big numbers, statistics, and good decisions” by Michael Milton

Use the excel file in MyJCU Xfda_ch04.xlsx

Load, save as Yourname_lastname_dv.xlsxFollow instructions in class

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6

Excel scatter chart

Now use the excel file in MyJCU Xfda_ch04.xlsx

Load, save as Yourname_lastname_dv.xlsx

Compute averages, max and draw this scatter chart using revenues (Y axis) and TimeOnSite (X axis)

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Excel scatter chart done

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Scatter chart with extra axis: see select data