Figures captions and labels in knitr

Question

I\'m new to Knitr. I\'m trying to make a report using r chunks, and I can\'t figure out how to use captions and labels to reference the figure later on. Here\'s an example

Answer 1

You can achieve this by including fig_caption: yes in the header:

---
title: "Plotting"
output:
  pdf_document:
    fig_caption: yes
---

```{r figs, echo=FALSE, fig.width=7,fig.height=6,fig.cap="\\label{fig:figs}plotting example"}
par(mfrow=c(2,2))
plot(1:10, col=2)
plot(density(runif(100, 0.0, 1.0)))
plot(runif(100, 0.0, 1.0),type="l")
```

in Figure \ref{fig:figs} we see examples of plotting in R.

Note that the figure caption label should be included in the caption with a double backslash, as shown above.