我想要做的是循环使用不同样本的数据集并使用ggplot2制作重叠密度图。 1个参考样本与其他样本一起绘制在每个图中。 绘图本身是没有问题的,但颜色是:为ggplot2中的变量定义图例颜色
数据集:
df <- data.frame(SampleName = c("a","a","a","b","b","b","c","c","c"),
Data = c(1,1,2,4,6,7,3,4,9))
随着scale_fill_manual我可以一个颜色分配给特定的样品:
#1
ggplot() +
geom_density(data=subset(df, SampleName == "a"),
aes(x = Data, group=SampleName, fill=SampleName), alpha= 0.6) +
geom_density(data=subset(df, SampleName == "b"),
aes(x = Data, group=SampleName, fill=SampleName), alpha= 0.6) +
scale_fill_manual(values = c("b" = "red", "a" = "green"))
与含有所有的矢量样本名称我可以制作一个循环,用“b”作为固定样本绘制所有叠加图:
#2
Samples <- c("a","b","c")
for(i in 1:length(Samples)){
print(ggplot() +
geom_density(data=subset(df, SampleName == Samples[i]),
aes(x = Data, group=SampleName, fill=SampleName), alpha= 0.6) +
geom_density(data=subset(df, SampleName == "b"),
aes(x = Data, group=SampleName, fill=SampleName), alpha= 0.6) +
scale_fill_manual(values = c("red", "green"))
)
}
#2中的问题是样品在b固定时改变颜色 - >在第一个图中,b是绿色,a是红色,图3中的b是红色,c是绿色。 当我尝试将#1中的颜色分配给特定样本(请参阅#3)时,将显示以下错误消息:
“错误:意外'='于: ”aes(x = Data,group =我试过不同的事情,使'样本[样本名称,填充=样本名称),alpha = 0.6))+ scale_fill_manual(values = c(“b”=“red”,Samples [i] =“
'我] = “绿色””更多 '的文本,如' 与as.character,粘贴(),...但是这似乎并没有工作。 任何解决方案?
#3
for(i in 1:length(Samples)){
print(ggplot() +
geom_density(data=subset(df, SampleName == Samples[i]),
aes(x = Data, group=SampleName, fill=SampleName), alpha= 0.6) +
geom_density(data=subset(df, SampleName == "b"),
aes(x = Data, group=SampleName, fill=SampleName), alpha= 0.6)) +
scale_fill_manual(values = c("b" = "red", Samples[i] = "green"))
}
的伎俩! Thx很多,一直在寻找年龄来完成这项工作,并且让它看起来很容易=) – User1234567