在块内处理Rmarkdown

Question

I would like to add a formatted section to a knitr markdown report conditional on some parameters.

Eg,

```{r conditional, eval=outliers, result="asis"}
# If outliers==TRUE, the following section is added to the report
print(
  "# Conditional section

  ## Subsection

  This is here because **outliers==TRUE**!")
```

Of course, the above doesn't work at all. How can I modify it so that it does?

Answer 1

You're very close already. You need to use cat instead of print . You will also want to change how you supply your string. Your section headings won't render with white space in front of them.

---
title: "Untitled"
output: html_document
---

```{r}
outliers <- TRUE
```

```{r conditional, eval=outliers, results="asis"}
# If outliers==TRUE, the following section is added to the report
cat(
"# Conditional section  

## Subsection

This is here because **outliers==TRUE**!")
```

Or alternatively

---
title: "Untitled"
output: html_document
---

```{r}
outliers <- TRUE
```

```{r conditional, eval=outliers, results="asis"}
# If outliers==TRUE, the following section is added to the report
cat(
  "# Conditional section  ",
  "## Subsection  ",
  "This is here because **outliers==TRUE**!",
  sep = "\n")
```