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我有看起来像这样的谨慎数据:

height <- c(1,2,3,4,5,6,7,8)
weight <- c(100,200,300,400,500,600,700,800)
person <- c("Jack","Jim","Jill","Tess","Jack","Jim","Jill","Tess")
set <- c(1,1,1,1,2,2,2,2)
dat <- data.frame(set,person,height,weight)

我正在尝试绘制具有相同 x 轴(人)和 2 个不同 y 轴(体重和身高)的图表。我发现所有示例都试图绘制辅助轴 (sec_axis)或使用基图的离散数据。是否有一种简单的方法可以将 sec_axis 用于 ggplot2 上的离散数据?编辑:评论中有人建议我尝试建议的回复。但是,我现在遇到了这个错误

这是我当前的代码:

p1 <- ggplot(data = dat, aes(x = person, y = weight)) + 
  geom_point(color = "red") + facet_wrap(~set, scales="free") 
p2 <- p1 + scale_y_continuous("height",sec_axis(~.*1.2, name="height"))
p2

I get the error: Error in x < range[1] : 
  comparison (3) is possible only for atomic and list types

或者,现在我修改了示例以匹配发布的示例。

p <- ggplot(dat, aes(x = person))
p <- p + geom_line(aes(y = height, colour = "Height"))

# adding the relative weight data, transformed to match roughly the range of the height
p <- p + geom_line(aes(y = weight/100, colour = "Weight"))

# now adding the secondary axis, following the example in the help file ?scale_y_continuous
# and, very important, reverting the above transformation
p <- p + scale_y_continuous(sec.axis = sec_axis(~.*100, name = "Relative weight [%]"))

# modifying colours and theme options
p <- p + scale_colour_manual(values = c("blue", "red"))
p <- p + labs(y = "Height [inches]",
              x = "Person",
              colour = "Parameter")
p <- p + theme(legend.position = c(0.8, 0.9))+ facet_wrap(~set, scales="free") 
p

我收到一条错误消息

"geom_path: Each group consists of only one observation. Do you need to 
 adjust the group aesthetic?"

我得到了模板,但没有绘制任何点

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1 回答 1

0

如果未明确指定参数名称,则 R 函数参数按位置输入。正如@Z.Lin 在评论中提到的那样,您需要在函数sec.axis=之前sec_axis表明您正在将此函数提供sec.axisscale_y_continuous. 如果你不这样做,它将被输入到 的第二个参数中scale_y_continuous,默认情况下是breaks=. 因此,错误消息与您没有为breaks参数输入可接受的数据类型有关:

p1 <- ggplot(data = dat, aes(x = person, y = weight)) + 
  geom_point(color = "red") + facet_wrap(~set, scales="free") 
p2 <- p1 + scale_y_continuous("weight", sec.axis = sec_axis(~.*1.2, name="height"))
p2

![在此处输入图像描述

的第一个参数 ( name=)scale_y_continuous用于第一个y 刻度,其中sec.axis=参数用于第二个y 刻度。我更改了您的第一个 y 比例名称以纠正该问题。

于 2017-09-05T03:27:46.330 回答