# Example 7.29: Bubble plots colored by a fourth variable

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In Example 7.28, we generated a bubble plot showing the relationship among CESD, age, and number of drinks, for women. An anonymous commenter asked whether it would be possible to color the circles according to gender. In the comments, we showed simple code for this in R and hinted at a SAS solution for two colors. Here we show in detail what the SAS code would look like, and revisit the R
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