Format for converting from R Markdown to an ioslides presentation.
ioslides_presentation(logo = NULL, slide_level = 2,
incremental = FALSE, fig_width = 7.5, fig_height = 4.5,
fig_retina = 2, fig_caption = TRUE, dev = "png",
df_print = "default", smart = TRUE, self_contained = TRUE,
widescreen = FALSE, smaller = FALSE, transition = "default",
mathjax = "default", analytics = NULL, template = NULL,
css = NULL, includes = NULL, keep_md = FALSE, lib_dir = NULL,
md_extensions = NULL, pandoc_args = NULL,
extra_dependencies = NULL, ...)Path to file that includes a logo for use in the presentation (should be square and at least 128x128).
Header level to consider as slide separator (Defaults to header 2).
TRUE to render slide bullets incrementally.
Note that if you want to reverse the default incremental behavior for an
individual bullet you can preceded it with >.
For example: > - Bullet Text.
Default width (in inches) for figures
Default height (in inches) for figures
Scaling to perform for retina displays (defaults to 2, which
currently works for all widely used retina displays). Set to NULL to
prevent retina scaling. Note that this will always be NULL when
keep_md is specified (this is because fig_retina relies on
outputting HTML directly into the markdown document).
TRUE to render figures with captions
Graphics device to use for figure output (defaults to png)
Method to be used for printing data frames. Valid values
include "default", "kable", "tibble", and "paged". The "default" method uses
print.data.frame. The "kable" method uses the
knitr::kable function. The "tibble" method uses
the tibble package to print a summary of the data frame. The "paged"
method creates a paginated HTML table (note that this method is only valid
for formats that produce HTML). In addition
to the named methods you can also pass an arbitrary function to be used
for printing data frames. You can disable the df_print behavior entirely
by setting the option rmarkdown.df_print to FALSE.
Produce typographically correct output, converting straight
quotes to curly quotes, --- to em-dashes, -- to en-dashes, and
... to ellipses.
Produce a standalone HTML file with no external dependencies, using data: URIs to incorporate the contents of linked scripts, stylesheets, images, and videos. Note that even for self contained documents MathJax is still loaded externally (this is necessary because of its size).
Display presentation with wider dimensions.
Use smaller text on all slides. You can also enable this for
individual slides by adding the .smaller attribute to the slide
header (see Presentation Size below for details).
Speed of slide transitions. This can be "default", "slower", "faster", or a numeric value with a number of seconds (e.g. 0.5).
Include mathjax. The "default" option uses an https URL from a
MathJax CDN. The "local" option uses a local version of MathJax (which is
copied into the output directory). You can pass an alternate URL or pass
NULL to exclude MathJax entirely.
A Google analytics property ID.
Pandoc template to use for rendering. Pass "default" to use
the rmarkdown package default template; pass NULL to use pandoc's
built-in template; pass a path to use a custom template that you've created.
Note that if you don't use the "default" template then some features of
html_document won't be available (see the Templates section below for
more details).
One or more css files to include
Named list of additional content to include within the
document (typically created using the includes function).
Keep the markdown file generated by knitting.
Directory to copy dependent HTML libraries (e.g. jquery,
bootstrap, etc.) into. By default this will be the name of the document with
_files appended to it.
Markdown extensions to be added or removed from the
default definition or R Markdown. See the rmarkdown_format for
additional details.
Additional command line options to pass to pandoc
Additional function arguments to pass to the
base R Markdown HTML output formatter html_document_base
Additional function arguments to pass to the
base R Markdown HTML output formatter html_document_base
R Markdown output format to pass to render.
You can create a slide show broken up into sections by using the # and ##
heading tags (you can also create a new slide without a header using a
horizontal rule (----------). For example here's a simple slide show:
--- title: "Habits" author: John Doe date: March 22, 2005 output: ioslides_presentation ---# In the morning
## Getting up
- Turn off alarm - Get out of bed
## Breakfast
- Eat eggs - Drink coffee
# In the evening
## Dinner
- Eat spaghetti - Drink wine
----------
## Going to sleep
- Get in bed - Count sheep
You can add a subtitle to a slide or section by including text after the pipe (|) character. For example:
## Getting up | What I like to do first thing
The following single character keyboard shortcuts enable alternate display modes:
'f' enable fullscreen mode
'w' toggle widescreen mode
'o' enable overview mode
'h' enable code highlight mode
'p' show presenter notes
Pressing Esc exits all of these modes. See the sections below on
Code Highlighting and Presenter Mode for additional
detail on those modes.
You can render bullets incrementally by adding the incremental
option:
---
output:
ioslides_presentation:
incremental: true
---
If you want to render bullets incrementally for some slides but not others you can use this syntax:
> - Eat eggs > - Drink coffee
You can display the presentation using a wider form factor using the
widescreen option. You can specify that smaller text be used with
the smaller option. For example:
---
output:
ioslides_presentation:
widescreen: true
smaller: true
---
You can also enable the smaller option on a slide-by-slide basis
by adding the .smaller attibute to the slide header:
## Getting up {.smaller}You can add a logo to the presentation using the logo option (the
logo should be square and at least 128x128). For example:
---
output:
ioslides_presentation:
logo: logo.png
---
A 128x128 version of the logo graphic will be added to the title slide and an icon version of the logo will be included in the bottom-left footer of each slide.
Slides can also have a .build attribute that indicate that their
content should be displayed incrementally. For example:
## Getting up {.build}Slide attributes can be combined if you need to specify more than one, for example:
## Getting up {.smaller .build}It's possible to select subsets of code for additional emphasis by adding a special "highlight" comment around the code. For example:
### <b> x <- 10 y <- x * 2 ### </b>
The highlighted region will be displayed with a bold font. When you want to
help the audience focus exclusively on the highlighted region press the
'h' key and the rest of the code will fade away.
The ioslides template has an attractive default style for tables so you shouldn't hesitate to add tables for presenting more complex sets of information. Pandoc markdown supports several syntaxes for defining tables which are described in the pandoc online documentation.
You can center content on a slide by adding the .flexbox
and .vcenter attributes to the slide title. For example:
## Dinner {.flexbox .vcenter}You can horizontally center content by enclosing it in a div tag
with class centered. For example:
<div class="centered"> This text is centered. </div>
You can do a two-column layout using the columns-2 class.
For example:
<div class="columns-2"> - Bullet 1 - Bullet 2 - Bullet 3 </div>
Note that content will flow across the columns so if you want to have an image on one side and text on the other you should make sure that the image has sufficient height to force the text to the other side of the slide.
You can color content using base color classes red, blue, green, yellow, and gray (or variations of them e.g. red2, red3, blue2, blue3, etc.). For example:
<div class="red2"> This text is red </div>
A separate presenter window can also be opened (ideal for when you are
presenting on one screen but have another screen that's private to you).
The window stays in sync with the main presentation window and also
shows presenter notes and a thumbnail of the next slide. To enable
presenter mode add ?presentme=true to the URL of the presentation,
for example:
mypresentation.html?presentme=true
The presenter mode window will open and will always re-open with the presentation until it's disabled with:
mypresentation.html?presentme=false
To add presenter notes to a slide you include it within a "notes"
div. For example:
<div class="notes"> This is my *note*.- It can contain markdown - like this list
</div>
You can print an ioslides presentation from within browsers that have good support for print CSS (i.e. as of this writing Google Chrome has the best support). Printing maintains most of the visual styles of the HTML version of the presentation.
To create a PDF version of a presentation you can use Print to PDF from Google Chrome.
See the
online documentation for additional details on using the
ioslides_presentation format.
Note that, if a before_body include is specified in includes,
then it will replace the standard title slide entirely.