### Markdown Quick Reference

R Markdown is an easy-to-write plain text format for creating dynamic documents and reports. See Using R Markdown to learn more.

#### Emphasis

    *italic*   **bold**

    _italic_   __bold__

#### Headers

    # Header 1

    ## Header 2

    ### Header 3

#### Lists

##### Unordered List

    * Item 1
    * Item 2
        + Item 2a
        + Item 2b

##### Ordered List

    1. Item 1
    2. Item 2
    3. Item 3
        + Item 3a
        + Item 3b

#### Manual Line Breaks

End a line with two or more spaces:

    Roses are red,
    Violets are blue.

#### Links

Use a plain http address or add a link to a phrase:

    http://example.com

    [linked phrase](http://example.com)

#### Images

Images on the web or local files in the same directory:

    ![alt text](http://example.com/logo.png)

    ![alt text](figures/img.png)

#### Blockquotes

    A friend once said:

    > It's always better to give
    > than to receive.

#### R Code Blocks

R code will be evaluated and printed

    ```{r}
    summary(cars$dist)
    summary(cars$speed)
    ```

#### Inline R Code

    There were `r nrow(cars)` cars studied

#### Plain Code Blocks

Plain code blocks are displayed in a fixed-width font but not evaulated

    ```
    This text is displayed verbatim / preformatted
    ```

#### Inline Code

    We defined the `add` function to
    compute the sum of two numbers.

#### LaTeX Equations

##### Inline Equation

    $equation$

##### Display Equation

    $$ equation $$

#### Horizontal Rule / Page Break

Three or more asterisks or dashes:

    ******

    ------

#### Tables

    First Header  | Second Header
    ------------- | -------------
    Content Cell  | Content Cell
    Content Cell  | Content Cell

#### Reference Style Links and Images

##### Links

    A [linked phrase][id].

    At the bottom of the document:

    [id]: http://example.com/ "Title"

##### Images

    ![alt text][id]

    At the bottom of the document:

    [id]: figures/img.png "Title"

#### Miscellaneous

    superscript^2^

    subscript~2~

    ~~strikethrough~~

#### Typographic Entities

ASCII characters are transformed into typographic HTML entities:

- Straight quotes ( " and ' ) into “curly” quotes
- Dashes (“`--`” and “`---`”) into en- and em-dash entities
- Three consecutive dots (“...”) into an ellipsis entity