我想在主图中绘制线性模型的数据,并将效果图(森林图)绘制为子图,使用arrangeGrob
.
以下是数据:
set.seed(1)
main.df <- data.frame(sample=c(paste("E.plus.A.plus",1:3,sep="_"),paste("E.minus.A.plus",1:3,sep="_"),paste("E.plus.A.minus",1:3,sep="_"),paste("E.minus.A.minus",1:3,sep="_")),
replicate=rep(1:3,4),cpm=c(rnorm(12)),
factor.level=factor(c(rep("E.plus.A.plus",3),rep("E.minus.A.plus",3),rep("E.plus.A.minus",3),rep("E.minus.A.minus",3)),
levels=c("E.plus.A.plus","E.minus.A.plus","E.plus.A.minus","E.minus.A.minus")))
effects.df <- data.frame(factor.level=c("E.plus.A.plus-E.minus.A.plus","E.plus.A.plus-E.plus.A.minus","E.plus.A.plus-E.minus.A.minus",
"E.minus.A.plus-E.plus.A.minus","E.minus.A.plus-E.minus.A.minus","E.plus.A.minus-E.minus.A.minus"),
effect=rnorm(6),effect.df=runif(6,0,0.5),p.value=runif(6,0,1),y=1:6+0.2)
effects.df$effect.high <- effects.df$effect+effects.df$effect.df
effects.df$effect.low <- effects.df$effect-effects.df$effect.df
effects.df$factor.level <- factor(effects.df$factor.level,levels=effects.df$factor.level)
ggplots:
require(ggplot2)
require(grid)
require(gridExtra)
main.plot <- ggplot(main.df,aes(x=replicate,y=cpm,color=factor.level))+geom_point(size=3)+
facet_wrap(~factor.level,ncol=length(levels(main.df$factor.level)))+
labs(x="replicate",y="cpm")+scale_x_continuous(breaks=unique(main.df$replicate))+theme_bw()+
theme(legend.key=element_blank(),panel.border=element_blank(),strip.background=element_blank(),axis.title=element_text(size=8),plot.title=element_text(size=9,hjust=0.5))
sub.plot <- ggplot(effects.df,aes(x=effect,y=factor.level,color=factor.level))+geom_point(size=2.5,shape=19)+geom_errorbarh(aes(xmax=effect.high,xmin=effect.low),height=0.1)+
geom_vline(xintercept=0,linetype="longdash",colour="black",size=0.25)+theme_bw()+theme(legend.key=element_blank(),panel.border=element_blank(),strip.background=element_blank(),axis.title=element_text(size=7),axis.text=element_text(size=7),legend.text=element_text(size=7),legend.title=element_text(size=7))+
geom_text(aes(x=effects.df$effect,y=effects.df$y,label=format(signif(effects.df$p.value,2),scientific=T)),size=2.5)
以下是我尝试将它们组合成一个情节的方法:
if(!is.null(dev.list())) dev.off()
blank <- grid.rect(gp = gpar(col = "white"))
sub.plot.grob <- arrangeGrob(blank,sub.plot,ncol=1)
combined.plot <- arrangeGrob(main.plot,sub.plot,ncol=2,widths=c(1,1))
grid.arrange(combined.plot)
如何调整位置和尺寸以使其sub.plot
更小(所有图层,例如文本按比例缩小),并位于图例下方main.plot
?