Theme函数

ggplot2调整绘图区域大小

theme(
plot.margin=unit(rep(1,4),'lines')
)

• plot.margin : margin around entire plot (unit with the sizes of the top, right, bottom, and left margins)

隐藏坐标轴

theme(
    axis.line.x.bottom = element_blank(),
)

隐藏刻度线

theme(
   axis.ticks.x = element_blank()
)

隐藏刻度值

theme(
axis.text.x = element_blank()
    )

显示外边框

theme(
    panel.border = element_rect(fill = NA), 
  )