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Questions and Answers
What is the main idea behind the principle of proportional ink?
Why should you avoid 3D visualizations in data representation?
What is a common pitfall to avoid when using color in figures?
What is the purpose of using larger axis labels in figures?
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What is an advantage of using multi-panel figures?
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Why is it important to balance the data and context in a figure?
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What is redundant coding in the context of data visualization?
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Why is it recommended to avoid line drawings in figures?
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What is the purpose of using titles, captions, and tables in figures?
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How should you handle overlapping points in a figure?
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Study Notes
Data Visualization
- Use bars or shaded areas to show differences between conditions, making it explicit which differences are being shown.
- Logarithmic scales: data values are not linearly spaced along the axis.
- Visualizing large datasets: simple x-y scatterplots may not work well due to overlapping points.
Handling Overlapping Points
- Density plots can be integrated into the margins of a scatterplot to handle overlapping points.
- In small datasets, multiple observations may have the same numeric values due to low precision or rounding.
Multi-Panel Figures
- Create multi-panel figures to show large and complex datasets, which may contain more information than can be shown in a single figure panel.
- Compound figures: separate figure panels assembled in an arbitrary arrangement, which may or may not be grid-based.
- Small multiples: plots consisting of multiple panels arranged in a regular grid, each showing a different subset of the data, but all using the same type of visualization.
Principles of Figure Design
- The principle of proportional ink: the area of a shaded region should be directly proportional to the corresponding value.
- Avoid common pitfalls of color use, redundant coding, and line drawings.
- Use larger axis labels and avoid 3D visualizations.
- Balance the data and the context, and use titles, captions, and tables effectively.
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Description
Quiz on data visualization techniques, interpreting graphs and charts, and understanding differences between conditions. Examples include changes in median income in Hawaiian counties