编辑：我后来意识到错误出在我的完整数据集中，而不是代码中。我很抱歉。这对其他人可能有用也可能没有用。
我有一个小标题，有一个名为“几何”的列，它是多边形（我使用的是 sf 空间包）。我正在尝试向作为每个多边形质心的小标题添加一列。但是，我收到一个错误：“mutate_impl(.data, dots) 中的错误：评估错误：没有适用于 'st_centroid' 的方法应用于“NULL”类的对象。” 我看过一些关于类似主题的其他帖子，但不是很相似，以至于我无法弄清楚。如果我错过了什么，我道歉！
我不熟悉使用管道和 tidyverse，所以那里可能出了点问题。任何帮助，将不胜感激！
这是我的代码示例：
center1 = function(df){
centroid = st_centroid(df)
}
table2 = x %>%
mutate(center.1 =map(geometry, center1))
这是我的数据的一个非常小的样本（只有一行）——x 代码中的变量（对不起长度！）：我加载了 tidyverse、tibble、dplyr、purrr 和 sf。
x=structure(list(segnum = 428, system.time_start = 951350400000,
data = list(structure(list(id = c("1", "1", "1", "1", "1",
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