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
R Code Chunks

R code will be evaluated and printed

'''{r}
summary(cars$dist)
summary(cars$speed)
'''
Inline R Code

There were 'r nrow(cars)' cars studied
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:


Blockquotes

A friend once said:

> It's always better to give
> than to receive.
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
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"
Manual Line Breaks

End a line with two or more spaces:

Roses are red,
Violets are blue.
Miscellaneous

superscript^2^

~~strikethrough~~

was looking for some tips when i saw this. please share widely. 

source:http://rmarkdown.rstudio.com/authoring_basics.html

I found more from a git url, see below. 

Headers

# H1## H2### H3#### H4##### H5###### H6Alternatively, for H1 and H2, an underline-ish style:Alt-H1======Alt-H2------

H1

H2

H3

H4

H5

H6

Alternatively, for H1 and H2, an underline-ish style:

Alt-H1

Alt-H2

Emphasis

Emphasis, aka italics, with *asterisks* or _underscores_.Strong emphasis, aka bold, with **asterisks** or __underscores__.Combined emphasis with **asterisks and _underscores_**.Strikethrough uses two tildes. ~~Scratch this.~~

Emphasis, aka italics, with asterisks or underscores.

Strong emphasis, aka bold, with asterisks or underscores.

Combined emphasis with asterisks and underscores.

Strikethrough uses two tildes. Scratch this.

Lists

(In this example, leading and trailing spaces are shown with with dots: ⋅)

1. First ordered list item2. Another item⋅⋅* Unordered sub-list. 1. Actual numbers don't matter, just that it's a number⋅⋅1. Ordered sub-list4. And another item.⋅⋅⋅You can have properly indented paragraphs within list items. Notice the blank line above, and the leading spaces (at least one, but we'll use three here to also align the raw Markdown).⋅⋅⋅To have a line break without a paragraph, you will need to use two trailing spaces.⋅⋅⋅⋅⋅Note that this line is separate, but within the same paragraph.⋅⋅⋅⋅⋅(This is contrary to the typical GFM line break behaviour, where trailing spaces are not required.)* Unordered list can use asterisks- Or minuses+ Or pluses

First ordered list itemAnother itemUnordered sub-list.

Actual numbers don't matter, just that it's a numberOrdered sub-list

And another item.

You can have properly indented paragraphs within list items. Notice the blank line above, and the leading spaces (at least one, but we'll use three here to also align the raw Markdown).

To have a line break without a paragraph, you will need to use two trailing spaces.
Note that this line is separate, but within the same paragraph.
(This is contrary to the typical GFM line break behaviour, where trailing spaces are not required.)

Unordered list can use asterisksOr minusesOr pluses

Links

There are two ways to create links.

[I'm an inline-style link](https://www.google.com)[I'm an inline-style link with title](https://www.google.com "Google's Homepage")[I'm a reference-style link][Arbitrary case-insensitive reference text][I'm a relative reference to a repository file](../blob/master/LICENSE)[You can use numbers for reference-style link definitions][1]Or leave it empty and use the [link text itself].URLs and URLs in angle brackets will automatically get turned into links. http://www.example.com or <http://www.example.com> and sometimes example.com (but not on Github, for example).Some text to show that the reference links can follow later.[arbitrary case-insensitive reference text]: https://www.mozilla.org[1]: http://slashdot.org[link text itself]: http://www.reddit.com

I'm an inline-style link

I'm an inline-style link with title

I'm a reference-style link

I'm a relative reference to a repository file

You can use numbers for reference-style link definitions

Or leave it empty and use the link text itself.

URLs and URLs in angle brackets will automatically get turned into links. http://www.example.comor http://www.example.com and sometimes example.com (but not on Github, for example).

Some text to show that the reference links can follow later.

Images

Here's our logo (hover to see the title text):Inline-style: Reference-style: ![alt text][logo][logo]: https://github.com/adam-p/markdown-here/raw/master/src/common/images/icon48.png "Logo Title Text 2"

Here's our logo (hover to see the title text):

Inline-style:

Reference-style:

Code and Syntax Highlighting

Code blocks are part of the Markdown spec, but syntax highlighting isn't. However, many renderers -- like Github's and Markdown Here -- support syntax highlighting. Which languages are supported and how those language names should be written will vary from renderer to renderer.Markdown Here supports highlighting for dozens of languages (and not-really-languages, like diffs and HTTP headers); to see the complete list, and how to write the language names, see thehighlight.js demo page.

Inline 'code' has 'back-ticks around' it.

Inline code has back-ticks around it.

Blocks of code are either fenced by lines with three back-ticks ''', or are indented with four spaces. I recommend only using the fenced code blocks -- they're easier and only they support syntax highlighting.

'''javascriptvar s = "JavaScript syntax highlighting";alert(s);''' '''pythons = "Python syntax highlighting"print s''' '''No language indicated, so no syntax highlighting. But let's throw in a <b>tag</b>.'''

var s = "JavaScript syntax highlighting";alert(s);

s = "Python syntax highlighting"print s

No language indicated, so no syntax highlighting in Markdown Here (varies on Github). But let's throw in a <b>tag</b>.

Tables

Tables aren't part of the core Markdown spec, but they are part of GFM and Markdown Heresupports them. They are an easy way of adding tables to your email -- a task that would otherwise require copy-pasting from another application.

Colons can be used to align columns.| Tables | Are | Cool || ------------- |:-------------:| -----:|| col 3 is | right-aligned | $1600 || col 2 is | centered | $12 || zebra stripes | are neat | $1 |There must be at least 3 dashes separating each header cell.The outer pipes (|) are optional, and you don't need to make the raw Markdown line up prettily. You can also use inline Markdown.Markdown | Less | Pretty--- | --- | ---*Still* | 'renders' | **nicely**1 | 2 | 3

Colons can be used to align columns.

Tables Are Cool
col 3 is right-aligned $1600
col 2 is centered $12
zebra stripes are neat $1

There must be at least 3 dashes separating each header cell. The outer pipes (|) are optional, and you don't need to make the raw Markdown line up prettily. You can also use inline Markdown.

Markdown Less Pretty
Still renders nicely
1 2 3

Blockquotes

> Blockquotes are very handy in email to emulate reply text.> This line is part of the same quote.Quote break.> This is a very long line that will still be quoted properly when it wraps. Oh boy let's keep writing to make sure this is long enough to actually wrap for everyone. Oh, you can *put* **Markdown** into a blockquote.

Blockquotes are very handy in email to emulate reply text. This line is part of the same quote.

Quote break.

This is a very long line that will still be quoted properly when it wraps. Oh boy let's keep writing to make sure this is long enough to actually wrap for everyone. Oh, you can putMarkdown into a blockquote.

Inline HTML

You can also use raw HTML in your Markdown, and it'll mostly work pretty well.

<dl> <dt>Definition list</dt> <dd>Is something people use sometimes.</dd> <dt>Markdown in HTML</dt> <dd>Does *not* work **very** well. Use HTML <em>tags</em>.</dd></dl>

Definition listIs something people use sometimes.Markdown in HTMLDoes *not* work **very** well. Use HTML tags.

Horizontal Rule

Three or more...---Hyphens***Asterisks___Underscores

Three or more...

Hyphens

Asterisks

Underscores

Line Breaks

My basic recommendation for learning how line breaks work is to experiment and discover -- hit <Enter> once (i.e., insert one newline), then hit it twice (i.e., insert two newlines), see what happens. You'll soon learn to get what you want. "Markdown Toggle" is your friend.

Here are some things to try out:

Here's a line for us to start with.This line is separated from the one above by two newlines, so it will be a *separate paragraph*.This line is also a separate paragraph, but...This line is only separated by a single newline, so it's a separate line in the *same paragraph*.

Here's a line for us to start with.

This line is separated from the one above by two newlines, so it will be a separate paragraph.

This line is also begins a separate paragraph, but...
This line is only separated by a single newline, so it's a separate line in the same paragraph.

(Technical note: Markdown Here uses GFM line breaks, so there's no need to use MD's two-space line breaks.)

Youtube videos

They can't be added directly but you can add an image with a link to the video like this:

<a href="http://www.youtube.com/watch?feature=player_embedded&v=YOUTUBE_VIDEO_ID_HERE" target="_blank"><img src="http://img.youtube.com/vi/YOUTUBE_VIDEO_ID_HERE/0.jpg" alt="IMAGE ALT TEXT HERE" width="240" height="180" border="10" /></a>

Or, in pure Markdown, but losing the image sizing and border:

[](http://www.youtube.com/watch?v=YOUTUBE_VIDEO_ID_HERE)