Getting 1 decimal place from summarise when option "digits" is set to 7答案

【问题标题】：Getting 1 decimal place from summarise when option "digits" is set to 7Getting 1 decimal place from summarise when option "digits" is set to 7
【发布时间】：2018-07-25 11:06:21
【问题描述】：

当我将68/70 相除，然后在命令行中取* 100 时，我得到97.14286，但是当我在summarise(perc_survived = (survived/N)*100) 中包含该公式时，输出为97.1。为什么会这样？
我检查了getOption("digits") 并返回了7。输出列标记为double，那为什么要截断小数位呢？

summarise(N = n(), survived = sum(Survived), perc_survived = (survived/N)*100)

【问题讨论】：

如果您可以共享您的数据，那么人们会更容易帮助您
这对我来说没问题，data.frame(survived = 68, N = 70)%>% summarise(new = (survived/N)*100) - 97.14286
啊哈...但这让我很兴奋97.1...tibble(survived = 68, N = 70)%>% summarise(new = (survived/N)*100)

标签： r dplyr rstudio

【解决方案1】：

只是tibble打印格式，见下图：

identical(
  tibble(survived = 68, N = 70) %>% summarise(new = (survived/N)*100) %>% .$new,
  68/70 * 100
  )
# [1] TRUE

【讨论】：

或者...%>% pull(new) :)