把几个图画在一起
<pre>`
library(ggplot2)
library(grid)

mydata <- read.csv("3cInCore.csv")

p1 <- ggplot(mydata,aes(species,length))
p1 <- p1 + geom_boxplot(aes(color = species),outlier.colour = "red",outlier.shape = 1)
p1 <- p1 + theme(legend.position="none") ##remove legend
p1 <- p1 + theme(text = element_text(size=20),axis.text.x = element_text(hjust=1))

p2 <- ggplot(mydata,aes(species,width))
p2 <- p2 + geom_boxplot(aes(color = species),outlier.colour = "red",outlier.shape = 1)
p2 <- p2 + theme(legend.position="none")
p2 <- p2 + theme(text = element_text(size=20),axis.text.x = element_text(hjust=1))

p3 <- ggplot(mydata,aes(species,l.w.ratio))
p3 <- p3 + geom_boxplot(aes(color = species),outlier.colour = "red",outlier.shape = 1)
p3 <- p3 + theme(legend.position="none")
p3 <- p3 + theme(text = element_text(size=20),axis.text.x = element_text(hjust=1))

p4 <- ggplot(mydata,aes(species,stria.10))
p4 <- p4 + geom_boxplot(aes(color = species),outlier.colour = "red",outlier.shape = 1)
p4 <- p4 + theme(legend.position="none")
p4 <- p4 + theme(text = element_text(size=20),axis.text.x = element_text(hjust=1))

p5 <- ggplot(mydata,aes(species,K))
p5 <- p5 + geom_boxplot(aes(color = species),outlier.colour = "red",outlier.shape = 1)
p5 <- p5 + theme(legend.position="none")
p5 <- p5 + theme(text = element_text(size=20),axis.text.x = element_text(hjust=1))

combine 5 diagrams in one

grid.newpage()
pushViewport(viewport(layout = grid.layout(1, 5))) ## 1 row, 4 cols
vplayout <- function(x, y){viewport(layout.pos.row = x, layout.pos.col = y)} ## choose the place of the diagram
print(p1, vp = vplayout(1, 1))
print(p2, vp = vplayout(1, 2))
print(p3, vp = vplayout(1, 3))
print(p4, vp = vplayout(1, 4))
print(p5, vp = vplayout(1, 5))`
</pre>