Yun YAN Puriney

OS X Screencast to animated GIF

This gist shows how to create a GIF screencast using only free OS X tools: QuickTime, ffmpeg, and gifsicle.

Instructions

To capture the video (filesize: 19MB), using the free "QuickTime Player" application:

See https://yihui.shinyapps.io/voice for the live demo. Make sure you have turned on your microphone and allow the web browser to have access to it. Credits go to annyang and also to @wch for showing me a minimal Shiny example. You can do four things on the scatterplot using your voice input:

say "title something" to change the plot title, e.g. title good morning
say "color a color name" to change the color, e.g. color blue
say "bigger" or "smaller" to change the size of points
say "regression" to add a linear regression line

Minimal R shiny app demonstrating:

how to upload a CSV file into an R/shiny app
how to automatically populate list selectors based on column headers
how to use optional list selectors
how to populate a list selector with column names of numerical columns only
how to use an action button to trigger an event when you're ready to do so

	%!TEX TS-program = xelatex
	\documentclass[12pt]{scrartcl}

	% The declaration of the document class:

	% The second line here, i.e.
	% \documentclass[12pt]{scrartcl}
	% is a standard LaTeX document class declaration:
	% we say what kind of document we are making in curly brackets,
	% and specify any options in square brackets.

	library(ShortRead)

	# Root of .bam filename
	sname <- "HG00100.unmapped.ILLUMINA.bwa.GBR.low_coverage.20130415"

	# Construct path to file
	fname <- file.path("alignments",paste(sname,".bam",sep=""))

	# Read alignments
	bm <- readGappedAlignments(fname)

	set.seed(1026)
	# dummy 2-D data: yi~xi(x1,x2)
	x = rbind(cbind(rnorm(50, 1, 0.3), rnorm(50, 2, 0.3)), cbind(rnorm(50, 2, 0.3), rnorm(50, 1, 0.3)))
	# [,1] [,2]
	# [1,] 1.6565944 1.696906
	# [2,] 0.9467358 1.458583
	# [3,] 0.9444174 1.513886
	# [4,] 0.2480391 2.273355
	# [5,] 0.8328066 2.078371
	# [6,] 0.9569322 2.174178

	# OS X termial theme
	# tell ls to be colourful
	export CLICOLOR=1
	export LSCOLORS=gxBxhxDxfxhxhxhxhxcxcx
	# tell grep to highlight matches
	export GREP_OPTIONS='--color=auto'
	# alias
	alias ls='ls -FGal'
	# set custom bash prompt
	#export PS1="\[\033[1;34m\]\!\[\033[0m\] \[\033[1;35m\]\u\[\033[0m\]:\[\033[1;35m\]\W\[\033[0m\]$ "

	<snippet>
	<content><![CDATA[
	{% highlight ${1:LanguageType} %}
	${2:CodesHere}
	{% endhighlight %}
	$0]]></content>
	<tabTrigger>mdcd</tabTrigger>
	<scope>text.html.markdown.multimarkdown, text.html.markdown</scope>
	</snippet>

	# http://rosettacode.org/wiki/Sorting_algorithms/Merge_sort#Perl
	sub merge_sort {
	my @x = @_;
	return @x if @x < 2;
	my $m = int @x / 2;
	my @a = merge_sort(@x[0 .. $m - 1]);
	my @b = merge_sort(@x[$m .. $#x]);
	for (@x) {
	$_ =
	!@a ? shift @b :