R Markdown 内联代码未执行 [英] R Markdown inline code not executed

问题描述

我有一个内联代码，在一行中用单个反引号括起来.然而，

I have an inline code enclosed with single backticks on a single line. However,

队列有 r echo = FALSE load("../data/cohort.rda") nrow(cohort) subjects.

未执行，因此以 html 和 pdf 格式为我提供此输出:

is not executed and thus gives me this output in html and pdf:

队列有 r echo = FALSE load("../data/cohort.rda") nrow(cohort) subjects.

我想要这个输出:该队列有 477 个主题.

I want this output: The cohort had 477 subjects.

当我排除 echo=FALSE 时，我收到此消息:

When I exclude echo=FALSE, I get this message:

从第 33-35 行退出(Manuscript.Rmd)base::parse(text = code, srcfile = NULL) 中的错误:1:25:意外的符号1:加载(../data/cohort.rda")nrow^

Quitting from lines 33-35 (Manuscript.Rmd) Error in base::parse(text = code, srcfile = NULL) : 1:25: unexpected symbol 1: load("../data/cohort.rda") nrow ^

调用:... inline_exec -> withVisible -> eval -> parse_only ->执行停止

Calls: ... inline_exec -> withVisible -> eval -> parse_only -> Execution halted

推荐答案

内联 R 代码需要是单个 R 语句，您可以通过用括号 {} 将整个代码块括起来来实现并用分号分隔命令.我将一个名为 tmp 的 3 行数据框保存到文件 tmp.rda 中，用这一行渲染了一个 Rmd 文件

The inline R code needs to be a single R statement, which you can achieve by surrounding the entire code chunk with brackets {} and separating commands with semicolons. I saved a 3-row data frame named tmp to file tmp.rda, rendered an Rmd file with this line

There are `r {load("tmp.rda"); nrow(tmp)}` observations

并得到预期的输出.

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