More advanced visualizations

Data Visualization in Tableau

Agata Bak-Geerinck

Senior Data Analyst, Telenet

Visualizing for various use cases

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Examples of Box plot, waterfall chart, heat map and scatter plot

Data Visualization in Tableau

Box plot - standardized chart for distribution of data

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  • A five-number summary:

    • Minimum
    • First quartile (Q1)
    • Median
    • Third quartile (Q3)
    • Maximum

  • How data is distributed, grouped?

  • Is it symmetrical/skewed?
  • Are there any outliers?

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An example of a box plot

Data Visualization in Tableau

Waterfall (bridge) chart - contribution and change

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A chart explaining the net change in value between two points, split over categories.

  • Presents category contribution to the total
  • Uses color to separate positive versus negative values
  • Exposes the complexity hidden behind an aggregated number
  • Often used with financial values
  • Works well with a limited amount of categories

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An example of a waterfall chart

Data Visualization in Tableau

Heat map - density and matrix comparisons

A colored chart for presenting density and comparisons, often in a matrix form.

Main forms and types of heat maps:

  • Colored (geo-)map
    • E.g., density of the population
  • Matrix comparison (as on the picture)
    • E.g., comparing temperatures per day and month
  • Uses easy-to-understand color gradations
  • Hard to interpret without detailed labels

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An example of a heat map

Data Visualization in Tableau

Scatter plot - relationship and correlation

A chart showing the relationship between two numerical variables plotted along both the X and Y axis.

  • Often used in exploratory data analysis
  • Used to plot data on a quadrant
  • Can be multidimensional, with the use of color, size, and shape
  • Can store a relatively high number of data marks
  • Difficult to communicate the data if they contain many data marks

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An example of a scatter plot

Data Visualization in Tableau

Get inspired - Tableau's Viz of The Day

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Examples of Tableau Viz of the Day

1 https://public.tableau.com/app/discover/viz-of-the-day
Data Visualization in Tableau

Let's practice!

Data Visualization in Tableau

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