How to suppress square bracket figure note in Rmarkdown

 In R Markdown documents, square brackets are often used to denote figure or table captions, such as "[Figure 1: My Caption]". If you want to suppress these square bracket figure notes in your R Markdown document, you can do so by using the `fig_caption` option and customizing the YAML metadata header.

Here's how to achieve this:

1. **Customize the YAML Metadata:**

   In the YAML metadata header at the top of your R Markdown document, you can specify the `fig_caption` option to control how figure captions are formatted. To suppress square brackets, set it to an empty string or to a custom format.

   For example, in your R Markdown document:

   ```yaml

   ---

   title: "My R Markdown Document"

   output:

     html_document:

       fig_caption: ""

   ---

   ```

   This will suppress the square bracket figure notes in the HTML output.

2. **Specify Custom Figure Captions:**

   If you want to provide your own custom figure captions without square brackets, you can do so explicitly when creating figures. For example:

   ```{r my_plot, fig.cap="My Custom Caption"}

   # R code to create the plot

   ```

   In this case, the figure caption will be "My Custom Caption" without any square brackets.

Customizing the `fig_caption` option and specifying custom captions allows you to control how figure captions are displayed in your R Markdown document, including suppressing square brackets if needed.