小编oli*_*902的帖子

我绘制了一个带有两个 y 轴的图表。然而，根据我的口味，轴的标题有点太接近了。我已经设法拉开主轴标题的距离，但不知道如何对次轴进行同样的操作。这是我使用过的代码：

ggplot(data1, aes(x=year))+
geom_line(aes(y= data1$`export share`, colour= "export share"), size = 2)+
  geom_line(aes(y=data1$pm25/coeff, colour= "pm25"), size = 2)+
  scale_x_continuous(breaks = scales::pretty_breaks(n = 17), name = "Year")+
  scale_y_continuous(name="Export Share of GDP", labels = scales::percent, sec.axis=sec_axis(trans = ~.*coeff, name = "PM2.5"))+
  theme(axis.title.y = element_text(margin = margin(t = 0, r = 20, b = 0, l = 0)), axis.text.x = element_text(vjust = 5) ,legend.title = element_blank(), legend.box.margin = margin(0,0,0,10), text = element_text(size = 30)) +
  scale_colour_discrete("",
                        breaks=c("export share", "pm25"),
                        labels=c("Export Share …