MohamedAlaa

tmux shortcuts & cheatsheet

start new:

tmux

start new with session name:

tmux new -s myname

derickfay

tell application "Keynote"
	tell document 1
		set theSlides to slides
		repeat with s in the slides
			tell presenter notes of s
				set font to "Helvetica"
				set size to 24
			end tell
		end repeat
	end tell

olivierlacan

This guide assumes that you recently run brew upgrade postgresql and discovered to your dismay that you accidentally bumped from one major version to another: say 9.3.x to 9.4.x. Yes, that is a major version bump in PG land.

First let's check something.

brew info postgresql

The top of what gets printed as a result is the most important:

rmcelreath

# "impute" missing binary predictor
# really just marginalizes over missingness
# imputed values produced in generated quantities

N <- 1000 # number of cases
N_miss <- 100 # number missing values
x_baserate <- 0.25 # prob x==1 in total sample
a <- 0 # intercept in y ~ N( a+b*x , 1 )
b <- 1 # slope in y ~ N( a+b*x , 1 )

halhen

# data from http://ec.europa.eu/eurostat/web/gisco/geodata/reference-data/population-distribution-demography/geostat
# Originally seen at http://spatial.ly/2014/08/population-lines/

# So, this blew up on both Reddit and Twitter. Two bugs fixed (southern Spain was a mess,
# and some countries where missing -- measure twice, submit once, damnit), and two silly superflous lines removed after
# @hadleywickham pointed that out. Also, switched from geom_segment to geom_line.

# The result of the code below can be seen at http://imgur.com/ob8c8ph

library(tidyverse)

halhen

# Download elevation tif from eg http://www.eea.europa.eu/data-and-maps/data/digital-elevation-model-of-europe
# First, convert elevation tif to a space delimited xyz (lng lat elevation) file
#  $ gdal_translate -of XYZ elevation3x3.tif /tmp/file.xyz

df <- read_delim('/tmp/file.xyz', delim=' ', col_names=FALSE)

df %>%
  mutate(X3 = na_if(X3, 0)) %>%
  ggplot(aes(X1, -X2 + 20 * X3/max(X3, na.rm=TRUE), group=X2)) +
    geom_line(size=0.05) +

nuest

Switching from XML to xml2

Rationale

The R package XML for parsing and manipulation of XML documents in R is not actively maintained anymore, but used by many:

The R package xml2 is an actively maintained, more recent alternative.

This file documents useful resources and steps for moving from XML to xml2.