为ggplot2生成的多个地块添加标题和格式化Y轴标签

Question

我有一个用ggplot2生成的包含10个散点图的多点图。我用来创建图的代码已经从这里删除了，我的问题是我想为每个散点图添加不同的标题，例如，图1的标题可以是"plot 1"，而plot 2的标题可以是"plot 2“，依此类推。我还想将所有地块的标签从当前标签"Y“更改为"purchases”。

Answer 1

只需创建您的图，并按照您引用的代码分别为每个图命名。然后使用gridExtra包进行安排。标签做标题，ylab函数可以用于y标签。

library(ggplot2)

# This example uses the ChickWeight dataset, which comes with ggplot2
# First plot
p1 <- ggplot(ChickWeight, aes(x=Time, y=weight, colour=Diet, group=Chick)) +
    geom_line() +
    ggtitle("Growth curve for individual chicks")

# Second plot
p2 <- ggplot(ChickWeight, aes(x=Time, y=weight, colour=Diet)) +
    geom_point(alpha=.3) +
    geom_smooth(alpha=.2, size=1) +
    ggtitle("Fitted growth curve per diet")

 # Third plot
p3 <- ggplot(subset(ChickWeight, Time==21), aes(x=weight, colour=Diet)) +
    geom_density() +
    ggtitle("Final weight, by diet")

# Fourth plot
p4 <- ggplot(subset(ChickWeight, Time==21), aes(x=weight, fill=Diet)) +
    geom_histogram(colour="black", binwidth=50) +
    facet_grid(Diet ~ .) +
    ggtitle("Final weight, by diet") +
    theme(legend.position="none")        # No legend (redundant in this graph)    

require(gridExtra)
grid.arrange(p1, p2, p3, p4, nrow = 2)