Pie charts are used to depict the proportion or size of a subgroup. These help us to understand the relative size of each category.
PSPP's options for pie charts are not in the graph menu. Instead, use the frequencies command (Analyze > Descriptive Statistics > Frequencies). Click on the "charts" button of the Frequencies dialog box to reveal a pie chart radio button.
A basic pie chart from the Frequencies command will look like this example. If this is a categorical variable (nominal scale), it will be important to use the value labels feature for the variable in the data editor - variable view. The values recorded for the codes will be used to label the pie slices.
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