如何创建在x和y轴上包含标题的多面分布图GGPLOT

Question

我有看起来像这样的数据

    df <- data.frame(c("Cell1","Cell2","NK-Cell"),c("K","L","S","L","K","S","S","L","K"),abs(log2(abs(rnorm(180)))))    
colnames(df) <- c("ctype","tissue","exp")

我正在尝试创建一个看起来像这样的情节。

Answer 1

在这种情况下，一般的想法是使用分面来获得这种情节。

ggplot(df,aes(exp))+geom_density()+facet_grid(tissue~ctype)

有两个空的图，因为tissue S没有Cell2值， tissue L没有NK-Cell值。