10 Questions
What is the main idea behind the principle of proportional ink?
Using shaded regions to represent numerical values, where the area is directly proportional to the value
Why should you avoid 3D visualizations in data representation?
Because they can be misleading and make it harder to compare data
What is a common pitfall to avoid when using color in figures?
Using colors that are not accessible to colorblind individuals
What is the purpose of using larger axis labels in figures?
To make the axis labels more readable
What is an advantage of using multi-panel figures?
They can display more data in a single figure
Why is it important to balance the data and context in a figure?
To ensure the data is presented accurately and clearly
What is redundant coding in the context of data visualization?
Using multiple colors to represent the same data
Why is it recommended to avoid line drawings in figures?
Because they can be ambiguous and hard to interpret
What is the purpose of using titles, captions, and tables in figures?
To provide additional context and explanation for the data
How should you handle overlapping points in a figure?
The content does not provide information on how to handle overlapping points
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.
Quiz on data visualization techniques, interpreting graphs and charts, and understanding differences between conditions. Examples include changes in median income in Hawaiian counties
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