Graph Types Based on Use
This chapter is designed to help you select the right graph type and format for your data. The types of graphs are organized by usage.
• Simple comparisons.
• Changes over time.
• Statistical analysis.
• Proportion.
Simple Comparisons
The graph types in this section let readers compare small numbers of datasets easily.
Bar Chart
Also called column charts, bar charts (Figure 11-1) are good for comparing or ranking a small number of values (no more than 10 or 12). They are also useful when the data sets are so similar that they would overlap if shown as lines. By using a bar chart, you can visually separate the data sets.
FIGURE 11-1 Sample bar chart.
The spacing between bars or sets of bars should be ...
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