在 R ggplot 中调整折线图

Question

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How do you adjust the line graph to avoid so much spare space?. Is scale alpha the way to trim the line graph?.

ggplot(cdata) + 
  geom_line(aes(x = Date, y = Value)) +

Answer 1

You can use the scale_x_* and scale_y_* family of functions in ggplot2 to control the scaling and limits of the axes.

Assuming your cdata$Date is a Date, you can do the following:

ggplot(cdata) +
  geom_line(aes(x = Date, y = Value)) +
  scale_x_date(limits = as.Date(c("2020-01-01", "2020-12-31")))

EDIT: If you are looking to scale the y axis, it is continuous, so you could use scale_y_continuous() . There are also other scaling functions available, like scale_*_discrete() , scale_*_log10() , and scale_*_reverse() , depending on the type of values on your axes.