在同一图表R上绘制两个图表,ggplot2 par(mfrow())

Question

在做了一些挖掘后我感觉这可能不会起作用,我需要发现一种替代方法,但我还是会问.

我必须通过使用来绘制我想在同一图表上绘制的图表 par(mfrow=c(1,2))

我的图表代码如下:

mTotal <- mean(data$Total)
mTotal

data$valence1[data$Total >= mTotal] <- "Above Mean"
data$valence1[data$Total < mTotal] <- "Below Mean"
data$valence2[data$Delta >= 0] <- "Positive"
data$valence2[data$Delta < 0] <- "Negative"

data

par(mfrow=c(1,2))

ggplot(data,
       aes(x = Index,
           y = Total,
           fill = valence1)) +
  geom_bar(stat = "identity",
           colour = "black",
           alpha = 0.618) +
  geom_hline(yintercept = mTotal,
             linetype = "dashed",
             colour = "red") + 
  annotate("text", x = 19, y = mTotal + 50,
           label = "Problem Period") + 
  xlab("Date") + 
  ylab("Ambulance Arrivals") +
  ggtitle("Ambulance Arrivals by Month
          Jan 2013 - Feb 2014")

maxDelta <- max(data$Delta)
maxDelta
minDelta <- min(data$Delta)
minDelta

ggplot(data,
       aes(x = Index,
           y = Delta,
           fill = valence2)) +
  geom_bar(stat = "identity",
           position = "identity",
           colour = "black",
           alpha = 0.618) +
  annotate("rect", xmin = 13.5, xmax = 24.5,
           ymin = minDelta, ymax = maxDelta,
           alpha = 0.3, fill = "blue") +
  annotate("text", x = 19, y = maxDelta + 25,
           label = "Problem Period") +
  xlab("Date") +
  ylab("Change in Arrivals") + 
  ggtitle("Change in Ambulance Arrivals Month over Month")

如果这是不可能的,那么可以理解到更好路线的方向.

谢谢,

Answer 1

查看gridExtra包并使用grid.arrange.与之相得益彰ggplot.

只要你的第一个分配ggplot调用一个变量(例如plot1)和下一个到另一个(例如plot2)和做类似:

grid.arrange(plot1, plot2, nrow=1, ncol=2)

Answer 2

mfrow用于基本图形.因为ggplot2你需要一种不同的方法,比如@hrbmstr提到的方法,或者这个方法:

library("ggplot2")
library("grid")

a <- qplot(x = rnorm(10))
b <- qplot(x = rnorm(10))

vplayout <- function(x, y) viewport(layout.pos.row = x, layout.pos.col = y)

grid.newpage()
pushViewport(viewport(layout = grid.layout(1, 2)))

print(a, vp = vplayout(1,1))
print(b, vp = vplayout(1,2))