我有一个data.frame
我试图以facetted
方式使用R
ggplot
' s { {1}}:
geom_boxplot
在这个例子中,有两个因素我想set.seed(1)
vals <- rnorm(12)
min.vals <- vals-0.5
low.vals <- vals-0.25
max.vals <- vals+0.5
high.vals <- vals+0.25
df <- data.frame(sample=c("c0.A_1","c0.A_2","c1.A_1","c1.A_2","c2.A_1","c2.A_2","c0.B_1","c0.B_2","c1.B_1","c1.B_2","c2.B_1","c2.B_2"),
replicate=rep(c(1,2),6),val=vals,min.val=min.vals,low.val=low.vals,max.val=max.vals,high.val=high.vals,
group=c(rep("A",6),rep("B",6)),cycle=rep(c("c0","c0","c1","c1","c2","c2"),2),
stringsAsFactors = F)
:
facet
但在其他情况下,我可能只有一个或两个以上的因素。
有没有办法传递给facet.factors <- c("group","cycle")
for(f in 1:length(facet.factors)) df[,facet.factors[f]] <- factor(df[,facet.factors[f]],levels=unique(df[,facet.factors[f]]))
levels.vec <- sapply(facet.factors,function(f) length(levels(df[,f])))
要素的向量和列数?
这是我尝试的内容,此外我还为每个因素级别创建了自己的颜色:
facet_wrap
显然会抛出此错误:
library(RColorBrewer,quietly=T)
library(scales,quietly=T)
level.colors <- brewer.pal(sum(levels.vec),"Set2")
require(ggplot2)
ggplot(df,aes_string(x="replicate",ymin="min.val",lower="low.val",middle="val",upper="high.val",ymax="max.val",col=facet.factors,fill=facet.factors))+
geom_boxplot(position=position_dodge(width=0),alpha=0.5,stat="identity")+
facet_wrap(~facet.factors,ncol=max(levels.vec))+
labs(x="Replicate",y="Val")+
scale_x_continuous(breaks=unique(df$replicate))+
scale_color_manual(values=level.colors,labels=unname(unlist(sapply(facet.factors,function(f) levels(df[,f])))),name="factor level")+scale_fill_manual(values=level.colors,labels=unname(unlist(sapply(facet.factors,function(f) levels(df[,f])))),name="factor level")+
theme_bw()+theme(legend.position="none",panel.border=element_blank(),strip.background=element_blank(),axis.title=element_text(size=8))
显然这有效:
Error in combine_vars(data, params$plot_env, vars, drop = params$drop) :
At least one layer must contain all variables used for facetting
但是它忽略了我传递的颜色并且没有添加图例,我想是因为我无法将ggplot(df,aes_string(x="replicate",ymin="min.val",lower="low.val",middle="val",upper="high.val",ymax="max.val",col=facet.factors,fill=facet.factors))+
geom_boxplot(position=position_dodge(width=0),alpha=0.5,stat="identity")+
facet_wrap(group~cycle,ncol=max(levels.vec))+
labs(x="Replicate",y="Val")+
scale_x_continuous(breaks=unique(df$replicate))+
scale_color_manual(values=level.colors,labels=unname(unlist(sapply(facet.factors,function(f) levels(df[,f])))),name="factor level")+scale_fill_manual(values=level.colors,labels=unname(unlist(sapply(facet.factors,function(f) levels(df[,f])))),name="factor level")+
theme_bw()+theme(legend.position="none",panel.border=element_blank(),strip.background=element_blank(),axis.title=element_text(size=8))
传递给vector
和col
{ {1}},显然我必须对分面进行硬编码。
这对于分面问题不起作用:
fill
所以我的问题是: 1.有没有办法将矢量传递给facet_wrap? 2.有没有办法用因子矢量而不是单个因子来着色和填充?
答案 0 :(得分:3)
我们不能指定两种颜色用于着色/填充到一个盒子,我建议将刻面变量粘贴在一起作为着色/填充比例:
df$col.fill <- Reduce(paste, df[facet.factors])
facets
的{p> facet_wrap
接受字符向量或单边公式:
facet.formula <- as.formula(paste('~', paste(facet.factors, collapse = '+')))
所以代码最终看起来像这样:
ggplot(df,
aes_string(
x = "replicate", ymin = "min.val", ymax = "max.val",
lower = "low.val", middle = "val", upper = "high.val",
col = "col.fill", fill = "col.fill"
)) +
geom_boxplot(position = position_dodge(width = 0),
alpha = 0.5,
stat = "identity") +
facet_wrap(facet.factors, ncol = max(levels.vec)) +
# alternatively: facet_wrap(facet.formula, ncol = max(levels.vec)) +
labs(x = "Replicate", y = "Val") +
scale_x_continuous(breaks = unique(df$replicate)) +
theme_bw() +
theme(
#legend.position = "none",
panel.border = element_blank(),
strip.background = element_blank(),
axis.title = element_text(size = 8)
)
顺便说一句,如果在代码中添加一些空格和换行符,肯定会提高可读性。