小编Elr*_*ant的帖子

在 Scopus 搜索中，可以使用 doi：

DOI(103/4fu49)

如何在同一个查询中包含多个 dois？

我的数据框如下所示：

df <- data.frame(label=c("yahoo","google","yahoo","yahoo","google","google","yahoo","yahoo"), year=c(2000,2001,2000,2001,2003,2003,2003,2003))

如何产生这样的热图：

library(ggplot2)
library(ggridges)
theme_set(theme_ridges())
ggplot(
  lincoln_weather, 
  aes(x = `Mean Temperature [F]`, y = `Month`)
  ) +
  geom_density_ridges_gradient(
    aes(fill = ..x..), scale = 3, size = 0.3
    ) +
  scale_fill_gradientn(
    colours = c("#0D0887FF", "#CC4678FF", "#F0F921FF"),
    name = "Temp. [F]"
    )+
  labs(title = 'Temperatures in Lincoln NE') 

如何翻转绘图轴，即以年份为 x 轴，以 y 轴为标签？