如何回避两个层面上pointrange ggplots？(How to dodge pointran

我想做出点范围曲线其中基团点不彼此堆叠。 情节应该是这样的： ：

做闪避我的最好的尝试是在躲闪参数使用向量：

library(ggplot2)

dat <- structure(list(Treatment = structure(c(1L, 1L, 1L, 1L, 1L, 1L, 
2L, 2L, 2L, 2L, 2L, 2L), .Label = c("A", "B"), class = "factor"), 
    Temp = structure(c(1L, 1L, 1L, 2L, 2L, 2L, 1L, 1L, 1L, 2L, 
    2L, 2L), .Label = c("10", "20"), class = "factor"), Rep = c(1L, 
    2L, 3L, 1L, 2L, 3L, 1L, 2L, 3L, 1L, 2L, 3L), Meas = c(3L, 
    2L, 2L, 2L, 6L, 4L, 4L, 3L, 5L, 1L, 2L, 3L), SD = c(2L, 3L, 
    2L, 2L, 2L, 3L, 2L, 3L, 3L, 3L, 2L, 1L)), .Names = c("Treatment", 
"Temp", "Rep", "Meas", "SD"), row.names = c(NA, -12L), class = "data.frame")

ggplot(dat, aes(x = Treatment, y = Meas, ymin = Meas - SD/2, ymax = Meas + SD/2)) +
geom_linerange(aes(color = Temp), position=position_dodge(width=c(0.6,0.4)), size = 1, alpha = 0.5) +
geom_point(aes(color = Temp, shape = Temp), position=position_dodge(width=c(0.6,0.4)), size = 3) +
theme_bw()

这会导致如下图所示的曲线图。 然而，所有的点都没有躲开，我要动点和误差线在Illustrator中获得上述情节表演。 有没有办法使用闪避的说法在某种程度上ggplot2在两个层面上？

Answer 1:

逻辑思维， position_dodge更适合吧。 它一起工作lineranges一个因子水平，但是在第二个层次是很难界定线之间的最小距离。 虽然你可以让因素之间的数值划分，然后添加了标签的适当位置。

dat1<-cbind(dat,aux=rep(1,length(dat[,1]))) 
dat1<-within(dat1, {aux = unlist(by(aux,Treatment,cumsum))})
dat1$aux<-dat1$aux+as.numeric(dat1$Treatment)*10
ggplot(dat1, aes( x=aux, y = Meas, ymin = Meas - SD/2, ymax = Meas + SD/2)) +
geom_linerange(aes(color = Temp), size = 1, alpha = 0.5) +geom_point(aes(color = Temp, shape = Temp))+
scale_x_continuous("Treatment",breaks=c(13.5,23.5), labels=c("A","B")) + # here you define coordinates for A and B 
theme_bw()

Answer 2:

这不会解决问题position_dodge()但将是这个问题的解决方法。

增加了新的变量x你原来的数据帧。 它包含x的点/ lineranges坐标。 在数据帧值应该是为了要绘制它们。

dat$x<-c(0.85,0.9,0.95,1.05,1.1,1.15,1.85,1.9,1.95,2.05,2.1,2.15)

现在使用这个新变量作为x值与scale_x_continuos()设置断点和标签，以获得A和B的规模。

ggplot(dat, aes(x = x, y = Meas, ymin = Meas - SD/2, ymax = Meas + SD/2)) +
  geom_linerange(aes(color = Temp), size = 1, alpha = 0.5) +
  geom_point(aes(color = Temp, shape = Temp), size = 3) +
  theme_bw()+
  scale_x_continuous("Treatment",breaks=c(1,2),labels=c("A","B"),limits=c(0.5,2.5))

文章来源: How to dodge pointrange ggplots on two levels?