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我試圖用的包使用grid.arrange繪製三個數字。我希望它們在一行中顯示爲3列，其中最左邊的圖應該有y軸，但沒有圖例，中間圖沒有y軸並且沒有圖例，最右邊的圖應該沒有y軸，但是應該包括傳說。這樣，圖例和y軸與所有圖形相同，只出現一次。在grid.arrange中獲取均勻的圖形寬度
下面是數據 - 它們與基因本體論的富集測試：
首先，圖例的顏色方案 - 爲每個富集p值範圍內的顏色：
color.order <- c("#7d4343","#B20000","#C74747","#E09898","#EBCCD6","#C8C8C8")
names(color.order) <- c("(0-0.05]","(0.05-0.1]","(0.1-0.15]","(0.15-0.2]","(0.2-0.25]","(0.25-1]")
然後圖data.frame S：
df.g1 <- data.frame(category=c("C1-up","C1-down","C2-up","C2-down"),
p.value=c(0.4833,0.5114,0.3487,0.6522),log10.p.value=c(3.157832,2.912393,4.575481,1.856192),
col=c("(0.25-1]","(0.25-1]","(0.25-1]","(0.25-1]"),
col.cat=c("(0.25-1]","(0.25-1]","(0.25-1]","(0.25-1]"))
df.g2 <- data.frame(category=c("C1-up","C1-down","C2-up","C2-down"),
p.value=c(0.5345,0.4819,0.9986,0.0013),log10.p.value=c(2.720522905,3.170430737,0.006084383,28.860566477),
col=c("(0.25-1]","(0.25-1]","(0.25-1]","(0-0.05]"),
col.cat=c("(0.25-1]","(0.25-1]","(0.25-1]","(0-0.05]"))
df.g3 <- data.frame(category=c("C1-up","C1-down","C2-up","C2-down"),
p.value=c(0.2262,0.7703,0.9926,0.0080),log10.p.value=c(6.45507399,1.13340102,0.03225729,20.96910013),
col=c("(0.2-0.25]","(0.25-1]","(0.25-1]","(0-0.05]"),
col.cat=c("(0.2-0.25]","(0.25-1]","(0.25-1]","(0-0.05]"))
把它們放在一起在一個列表：
df.list <- list(g1=df.g1,g2=df.g2,g3=df.g3)
這對於關聯p值的傳說範圍顏色：
color.order <- c("#7d4343","#B20000","#C74747","#E09898","#EBCCD6","#C8C8C8")
names(color.order) <- c("(0-0.05]","(0.05-0.1]","(0.1-0.15]","(0.15-0.2]","(0.2-0.25]","(0.25-1]")
和劇情創作代碼：
library(ggplot2)
library(gridExtra)
ggplot.list <- vector(mode="list", length(df.list))
for(g in 1:length(df.list))
{
if(g==1){ #draw y-axis but no legend
ggplot.list[[g]] <- ggplot(df.list[[g]], aes(y=log10.p.value,x=category,fill=col))+
scale_fill_manual(drop=FALSE,values=color.order,name="Enrichment P-value",guide=F)+
geom_bar(stat="identity",width=0.2)+scale_y_continuous(limits=c(0,30),labels=c(seq(0,20,10)," >30"),expand=c(0,0))+
theme_bw()+theme(panel.border=element_blank(),axis.text=element_text(size=8),axis.title=element_text(size=8,face="bold"))+coord_flip()+theme(plot.margin=unit(c(0.1,1,0.1,0.1),"cm"),axis.title.y = element_text(size=8),axis.title.x = element_text(size=8))+labs(x="Category",y="-10log10(P-value)")+ggtitle(names(df.list)[g])
} else if(g==2){ #no y-axis and no legend
ggplot.list[[g]] <- ggplot(df.list[[g]], aes(y=log10.p.value,x=category,fill=col))+
scale_fill_manual(drop=FALSE,values=color.order,name="Enrichment P-value",guide=F)+
geom_bar(stat="identity",width=0.2)+scale_y_continuous(limits=c(0,30),labels = c(seq(0,20,10)," >30"),expand=c(0,0))+
theme_bw()+theme(panel.border=element_blank(),axis.text=element_text(size=8),axis.title=element_text(size=8,face="bold"))+coord_flip()+theme(plot.margin=unit(c(0.1,1,0.1,0.1),"cm"),axis.title.y = element_blank(),axis.text.y=element_blank(),axis.title.x = element_text(size=8))+labs(y="-10log10(P-value)")+ggtitle(names(df.list)[g])
} else if(g==3){ #only legend
ggplot.list[[g]] <- ggplot(df.list[[g]], aes(y=log10.p.value,x=category,fill=col))+
scale_fill_manual(drop=FALSE,values=color.order,name="Enrichment P-value")+
geom_bar(stat="identity",width=0.2)+scale_y_continuous(limits=c(0,30),labels = c(seq(0,20,10)," >30"),expand=c(0,0))+
theme_bw()+theme(panel.border=element_blank(),axis.text=element_text(size=8),axis.title=element_text(size=8,face="bold"))+coord_flip()+theme(plot.margin=unit(c(0.1,1,0.1,0.1),"cm"),axis.title.y = element_blank(),axis.text.y=element_blank(),axis.title.x = element_text(size=8))+labs(y="-10log10(P-value)")+ggtitle(names(df.list)[g])
}
}
這讓我幾乎什麼，我需要： 
我的問題是這三個數字有不同的寬度。所以我的問題是如何使寬度相同？
