Great gist to make pdf of your slidify presentations. This is a fork of a fork from Ramnath Vaidyanathan. Is important that you copy the makefile exactly as it is in here. If that does't work, instead of copying the spaces, make tabs.

.gitignore

*.md
*.html
*.pdf
libraries

README.md

Creating PDF versions of slidify presentations

This gist consists of a makefile and a script that can automate the creation of PDFs from Slidify generated HTML slides. The script assumes that the makefile and the script makepdf.js are in the same directory as the Rmd file. The makepdf.js script uses casperjs, a very useful utility to automate tasks that require browser interaction. You may follow the installation instructions on the casperjs website, to make sure that you have all the dependencies correctly installed before trying this out.

Installing dependencies

To install the R packages:

# install devtools if you haven't already
# install.packages('devtools')
pkgs <- c("slidify", "slidifyLibraries", "rCharts")
install_github(pkgs, 'ramnathv', ref = 'dev')

To install casperjs 1.1 (as casperjs 1.0.x does not work with phantomjs versions >= 1.9.0) [on a mac with brew]:

brew install casperjs --devel

index.Rmd

---
title       :
subtitle    :
author      :
job         :
framework   : io2012        # {io2012, html5slides, shower, dzslides, ...}
highlighter : highlight.js  # {highlight.js, prettify, highlight}
hitheme     : tomorrow      #
widgets     : []            # {mathjax, quiz, bootstrap}
mode        : selfcontained # {standalone, draft}
---

## Read-And-Delete

1. Edit YAML front matter
2. Write using R Markdown
3. Use an empty line followed by three dashes to separate slides!

--- .class #id

## Slide 2

makefile

DELAY = 1000

RMD_FILE   =  $(wildcard *.Rmd)
HTML_FILE  = $(patsubst %.Rmd, %.html, $(RMD_FILE))
PDF_FILE   = $(patsubst %.Rmd, %.pdf, $(RMD_FILE))

pdf: $(PDF_FILE)
html: $(HTML_FILE)
all: $(PDF_FILE) $(HTML_FILE)



%.pdf: %.html
	casperjs makepdf.js $< $@ $(DELAY)

%.html: %.Rmd
	cd $(dir $<) && Rscript -e "slidify::slidify('index.Rmd')" && cd ..

clean:
	rm -rf libraries
	rm -r $(PDF_FILE)
	rm -r $(HTML_FILE)

.PHONY: clean

makepdf.js

var casper = require('casper').create({viewportSize:{width:1500,height:1000}});
var args = casper.cli.args;
var imgfile = (args[1] || Math.random().toString(36).slice(2))
casper.start(args[0], function() {
  this.wait(args[2], function(){
    this.captureSelector(imgfile, "slides");
  });
});
 
casper.run();