问题

当我filter()或者select()具有空格的列名称通常在dplyr中使用反引号定义时,我的内联代码块会中断.

示例数据

    ```{r setup, include=FALSE}
    knitr::opts_chunk$set(echo = TRUE)
    library(dplyr)
    library(knitr)
    library(lazyeval)

    df <- structure(list(1:3, 2:4), .Names = c("a", "b"), row.names = c(NA, -3L), class = "data.frame")

    df <- df %>% select(`a a`=a, `b b`=b)
    ```

内联代码块

我正在尝试类似的东西`r df %>% filter(`a a` == 1) %>% select(`a a`) %>% as.numeric()`,但是我收到以下错误:

    Error in base::parse(text = code, keep.source = FALSE) : <text>:2.0: unexpected end of input 1: df %>% filter( ^ Calls: <Anonymous> ... inline_exec -> withVisible …