---
title: "Canonical covariate columns"
output: rmarkdown::html_vignette
vignette: >
  %\VignetteIndexEntry{Canonical covariate columns}
  %\VignetteEngine{knitr::rmarkdown}
  %\VignetteEncoding{UTF-8}
---

```{r setup, include = FALSE}
knitr::opts_chunk$set(echo = FALSE, results = "asis")
md_path <- system.file("references", "covariate-columns.md",
                       package = "nlmixr2lib")
```

```{r emit}
if (nzchar(md_path) && file.exists(md_path)) {
  lines <- readLines(md_path, warn = FALSE)
  # Strip the leading top-level heading from the markdown — pkgdown
  # already emits an h1 from the vignette's YAML `title:` field, so
  # leaving it in produces a duplicated heading on the page.
  if (length(lines) > 0 && grepl("^# ", lines[1])) {
    lines <- lines[-1]
    while (length(lines) > 0 && !nzchar(lines[1])) lines <- lines[-1]
  }
  cat(lines, sep = "\n")
} else {
  cat("The covariate-columns register could not be located via",
      "`system.file()`; ensure the package is installed before",
      "rendering this vignette.\n")
}
```