使用R中ggplot2中的线连接两个数据集中的点

install.packages("ggplot2")

library(ggplot2)

df1 <- data.frame(x = c(1, 2, 3), y = c(4, 5, 6))
df2 <- data.frame(x = c(2, 3, 4), y = c(7, 8, 9))

plot <- ggplot() + xlim(1, 4) + ylim(4, 9)

plot <- plot + geom_point(data = df1, aes(x = x, y = y), color = "blue")
plot <- plot + geom_point(data = df2, aes(x = x, y = y), color = "red")

plot <- plot + geom_line(data = rbind(df1, df2), aes(x = x, y = y), color = "green")

print(plot)