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Exercise

Modifying theme elements

Many plot elements have multiple properties that can be set. For example, line elements in the plot such as axes and gridlines have a color, a thickness (size), and a line type (solid line, dashed, or dotted). To set the style of a line, you use element_line(). For example, to make the axis lines into red, dashed lines, you would use the following.

p + theme(axis.line = element_line(color = "red", linetype = "dashed"))

Similarly, element_rect() changes rectangles and element_text() changes text. You can remove a plot element using element_blank().

plt_prop_unemployed_over_time is available.

Instructions 1/4
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  • Give all rectangles in the plot, (the rect element) a fill color of "grey92" (very pale grey).
  • Remove the legend.key's outline by setting its color to be missing.
  • Look at the changes in the plot.