Day 36 of 180 Days of Data Viz Learning #jfdi

I’m doing some form of data visualization learning for 180 days because I need to #JFDI.  See post explaining how and why I’m doing this.

Just as a note to myself – huge improvements on Tableau performance and optimization.

The Wall Street Journal Guide to Information Graphics: The Dos and Don’ts of Presenting Data, Facts, and Figures

Chapter 3 Ready Reference (Math) Reading – Three Takeways
  • Median is useful for ranking outcomes.  Mode helps focus on typical outcome.  Standard deviation shows how tightly data is dispersed along mean.  Highly volatile stock has a high standard deviation.
  • A log scale allows you to include values that span orders of magnitude.  Using a log scale for timeline on x-axis allows you to show more detail in the short term on chart.
  • Y-axis on log scale adjusts the grid so that incremental change at different values of y-axis reflects its relative significance.

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