Exercise

Overlapping bar plots

You can customize bar plots further by adjusting the dodging so that your bars partially overlap each other. Instead of using position = "dodge", you're going to use position_dodge(), like you did with position_jitter() in the the previous exercises. Here, you'll save this as an object, posn_d, so that you can easily reuse it.

Remember, the reason you want to use position_dodge() (and position_jitter()) is to specify how much dodging (or jittering) you want.

For this example, you'll use the mtcars dataset.

Instructions 1/2

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1
- Use the functional form of the bar position: replace "dodge" with a call to position_dodge().
- Set its width to 0.2.
2
- Set the bar transparency level of the bars to 0.6.