通过stat_summary用mean_cl_boot获取计算所得的值

问题描述 投票:3回答:1

我正在以较大的置信区间绘制带有mean_cl_boot的一些X值

如何导出每个组中fun.y = meanfun.data = mean_cl_boot值的文本?

我在mean_cl_boot中有一个值的间隔,我想绘制它们并导出它们。

ggplot(iris, aes(x = Species, y = Petal.Length)) + 
geom_jitter(width = 0.5) + stat_summary(fun.y = mean, geom = "point", color = "red") + 
stat_summary(fun.data = mean_cl_boot, fun.args=(conf.int=0.9999), geom = "errorbar", width = 0.4)

我必须绘制平均值(fun.y = mean),并带有:

stat_summary(fun.y=mean, geom="text", aes(label=sprintf("%1.1f", ..y..)),size=3, show.legend=FALSE

但是我不能与mean_cl_boot相同。

r ggplot2 tidyverse mean confidence-interval
1个回答
3
投票

您可以通过stat_summary访问ggplot_build的数据。

首先,将ggplot调用存储在对象中:

g <- ggplot(iris, aes(x = Species, y = Petal.Length)) + 
  geom_jitter(width = 0.5) + 
  stat_summary(fun.y = mean, geom = "point", color = "red") + 
  stat_summary(fun.data = mean_cl_boot, fun.args=(conf.int=0.9999), geom = "errorbar", width = 0.4)

然后,加上:

ggplot_build(g)$data[[3]]

您得到用mean_cl_boot计算的值:

  x group     y     ymin     ymax PANEL xmin xmax colour size linetype width alpha
1 1     1 1.462 1.386000 1.543501     1  0.8  1.2  black  0.5        1   0.4    NA
2 2     2 4.260 4.024899 4.462202     1  1.8  2.2  black  0.5        1   0.4    NA
3 3     3 5.552 5.337199 5.798202     1  2.8  3.2  black  0.5        1   0.4    NA

为了正确设置标签,您可以这样做:

# extract the data
mcb <- ggplot_build(g)$data[[3]]

# add the labels to the plot
g + geom_text(data = mcb,
              aes(x = group, y = ymin, label = round(ymin,2)),
              color = "blue",
              vjust = 1)

结果:

enter image description here

但是可能更好的选择是使用包:

library(ggrepel)

g + geom_label_repel(data = mcb,
                     aes(x = group, y = ymin, label = round(ymin,2)),
                     color = "blue",
                     nudge_x = 0.2,
                     nudge_y = -0.2)

其结果:

enter image description here

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