在点图中绘制误差线的垂直末端 [英] Draw vertical ending of error bar line in dotplot

问题描述

我正在使用lattice绘制dotplot()或使用Hmisc绘制Dotplot().使用默认参数时，可以绘制没有垂直尾部的误差线

I am drawing dotplot() using lattice or Dotplot() using Hmisc. When I use default parameters, I can plot error bars without small vertical endings

-o-

但是我想得到

| --o-- |

我知道我可以得到

| --o-- |

当我使用 centipede.plot()从plotrix或 segplot()来自latticeExtra，但是这些解决方案并没有像Dotplot()那样给我提供很好的条件选项.我正在尝试使用plot.line的par.settings，它可以很好地用于更改错误栏的线条颜色，宽度等，但是到目前为止，我在添加垂直结尾方面一直没有成功:

when I use centipede.plot() from plotrix or segplot() from latticeExtra, but those solutions don't give me such nice conditioning options as Dotplot(). I was trying to play with par.settings of plot.line, which works well for changing error bar line color, width, etc., but so far I've been unsuccessful in adding the vertical endings:

require(Hmisc)
mean = c(1:5)
lo = mean-0.2
up = mean+0.2
d = data.frame (name = c("a","b","c","d","e"), mean, lo, up)
Dotplot(name ~ Cbind(mean,lo,up),data=d,ylab="",xlab="",col=1,cex=1,
        par.settings = list(plot.line=list(col=1),
                       layout.heights=list(bottom.padding=20,top.padding=20)))

请不要给我使用ggplot2的解决方案...

Please, don't give me solutions that use ggplot2...

推荐答案

我过去也有相同的需求，使用barchart()而不是Dotplot().

I've had this same need in the past, with barchart() instead of with Dotplot().

然后，我的解决方案是创建一个自定义面板功能:(1)首先执行原始面板功能； (2)然后使用panel.arrows()添加误差线(使用双向箭头，其中箭头的边缘与轴形成90度角).

My solution then was to create a customized panel function that: (1) first executes the original panel function ; and (2) then uses panel.arrows() to add the error bar (using a two-headed arrow, in which the edges of the head form a 90 degree angle with the shaft).

这是Dotplot()的样子:

# Create the customized panel function
mypanel.Dotplot <- function(x, y, ...) {
    panel.Dotplot(x,y,...)
        tips <- attr(x, "other")
        panel.arrows(x0 = tips[,1], y0 = y, 
                     x1 = tips[,2], y1 = y, 
                     length = 0.15, unit = "native",
                     angle = 90, code = 3)
}

# Use almost the same call as before, replacing the default panel function 
# with your customized function.
Dotplot(name ~ Cbind(mean,lo,up),data=d,ylab="",xlab="",col=1,cex=1,
        panel = mypanel.Dotplot,
        par.settings = list(plot.line=list(col=1),
                       layout.heights=list(bottom.padding=20,top.padding=20)))

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