# Include R code in an Rmarkdown figure caption


Here how to include R code in an Rmarkdown with figure caption and then save to PDF file.

Use fig_caption: true in your YAML and opts_knit$set(eval.after = "fig.cap")

---
title: "Example"
output:
  pdf_document:
    fig_caption: true
---

```{r parameters}
library(knitr)
opts_knit$set(eval.after = "fig.cap")
insert_custom <- "world"
```

followed by

```{r hello-world, fig.cap = paste('Hello', insert_custom)}
plot(rnorm(10))
```