Title of the Talk"

In memoiR: R Markdown and Bookdown Templates to Publish Documents

#| label: DoNotModify
#| include: false
### Utilities. Do not modify.
# Installation of packages if necessary
install_packages <- function(packages) {
  install_package <- function(package) {
    if (!package %in% installed.packages()[, 1]) {
      install.packages(package, repos = "https://cran.rstudio.com/")
    }
  }
  invisible(sapply(packages, install_package))
}

# Basic packages
install_packages(c("bookdown", "formatR", "kableExtra", "ragg"))

# Chunk font size hook: allows size='small' or any valid Latex font size in chunk options
def.chunk.hook  <- knitr::knit_hooks$get("chunk")
knitr::knit_hooks$set(chunk = function(x, options) {
  x <- def.chunk.hook(x, options)
  ifelse(
    options$size != "normalsize", 
    paste0("\n \\", options$size,"\n\n", x, "\n\n \\normalsize"),
    x
  )
})

#| label: Options
#| include: false
### Customized options for this document
# Add necessary packages here
packages <- c("tidyverse")
# Install them
install_packages(packages)

# knitr options
knitr::opts_chunk$set(
  cache =   FALSE,    # Cache chunk results
  include = TRUE,     # Show/Hide chunks
  echo =    FALSE,    # Show/Hide code
  warning = FALSE,    # Show/Hide warnings
  message = FALSE,    # Show/Hide messages
  # Figure alignment and size
  fig.align = 'center', out.width = '80%',
  # Graphic devices (ragg_png is better than standard png)
  dev = c("ragg_png", "pdf"),
  # Code chunk format
  tidy = TRUE, tidy.opts = list(blank = FALSE, width.cutoff = 50),
  size = "scriptsize", knitr.graphics.auto_pdf = TRUE
)
options(width = 50)

# ggplot style
library("tidyverse")
theme_set(theme_bw())
theme_update(
  panel.background = element_rect(fill = "transparent", colour = NA),
  plot.background = element_rect(fill = "transparent", colour = NA)
)
knitr::opts_chunk$set(dev.args = list(bg = "transparent"))

# Tibbles: 5 lines, fit to slide width
options(tibble.print_min = 5, tibble.width = 50)

# Random seed
set.seed(973)

Introduction

R Markdown

This is an R Markdown presentation. Markdown is a simple formatting syntax for authoring HTML, PDF, and MS Word documents. For more details on using R Markdown see http://rmarkdown.rstudio.com.

When you click the Knit button a document will be generated that includes both content as well as the output of any embedded R code chunks within the document.

Beamer Presentation Template

This template has the same features as others in the memoiR package except for multi-language support (no lang item in the header).

See the code of the following slides for some specific code of slides.

Advanced code

Slide with Incremental Bullets

Incremental bullets start with > - instead of -:

• Bullet 1
• A reference: @Xie2016.
• Bullet 3

Slide with R Output

R code chunks are displayed as follows:

#| label: cars
#| echo: true
head(cars)

Slide with a Centered Plot{.flexbox .vcenter}

#| label: pressure
plot(pressure)

Two Column Layout{.columns-2}

\begincols \begincol{.48\textwidth}

This slide has two columns.

In Beamer, each column in between \begincol and \endcol.

In HTML, the {.columns-2} option is added to the slide title and <p class="forceBreak"></p> allows forcing column break.

\endcol \begincol{.48\textwidth}

#| label: pressure2
#| out-width: 90%
plot(pressure)

\endcol \endcols

Documentation

See R Markdown: The Definitive Guide for full documentation about HTML slides.

Note:

• {.flexbox .vcenter} to center the HTML slide with plot.
• out.width='90%' to reduce the size of the plot in the Two Column Layout slide.

Keep the code below to have a slide for references, allow two-column slides in ioslides (but not in Slidy) and allow scrolling oversized slides.

r if (!knitr:::is_latex_output()) '## References {.smaller}'

memoiR documentation built on June 8, 2025, 11:16 a.m.