François Briatte briatte

## sample.r
# change of PRNG in R >= 3.6.0

# use former PRNG
RNGkind(sample.kind = "Rounding")

# use new/fixed PRNG
RNGkind(sample.kind = "default")

# see ?Random for details

## disc2019.R
library(cartography)
library(sp)
# Load data
data(nuts2006)

# Get a SpatialLinesDataFrame of countries borders
nuts0.contig.spdf <- getBorders(nuts0.spdf)

# Get the GDP per capita
nuts0.df$gdpcap <- nuts0.df$gdppps2008/nuts0.df$pop2008*1000000

## 0-download-all-ergm-sources.R
##
## download all `ergm` sources from v3.0-1 to today
##

library(rvest)

d <- "ergm-sources"
dir.create(d, showWarnings = FALSE)

# current source

## gist:ad24bb323d2603dbdd3af35086147c83
R to python useful data wrangling snippets

The dplyr package in R makes data wrangling significantly easier.
The beauty of dplyr is that, by design, the options available are limited.
Specifically, a set of key verbs form the core of the package.
Using these verbs you can solve a wide range of data problems effectively in a shorter timeframe.
Whilse transitioning to Python I have greatly missed the ease with which I can think through and solve problems using dplyr in R.
The purpose of this document is to demonstrate how to execute the key dplyr verbs when manipulating data using Python (with the pandas package).

dplyr is organised around six key verbs

## pairs_plot.R

library(tidyverse)
library(patchwork)

plot_pair <- function(data, x, y) {
  ggplot(data, aes_string(x = x, y = y, color = "Species", shape = "Species")) +
    geom_point() +
    scale_color_brewer(palette = "Dark2") +
    theme(legend.position = "none", plot.title = element_text(size = 7)) +
    labs(x = NULL, y = NULL, title = paste0(y, " ~ ", x))

## user6631314.do
clear
input str500 x
"-73.974651 40.73868,-73.973391 40.73897,-73.97323 40.73955,-73.97298 40.7415304,-73.97247 40.7423406,-73.97229 40.7428504,-73.97213 40.74338,-73.971871 40.7440804,-73.97141 40.7446706,-73.97103 40.7455605,-73.970301 40.7465204,-73.96929 40.7472"
"-73.970301 40.7465204,-73.96929 40.7472"
end

// keep only the first pair of coordinates
replace x = regexr(x, ",.*", "")

// split by space, converting to numeric

## session_info.r
# ==============================================================================
# SESSION_INFO
#
# A script to deal with package dependencies that will
#
#  - detach all packages except base ones
#  - install its own package dependencies
#  - look for session_info.txt and parse it for packages
#  - ensure the packages are installed and up to date
#

## label_facets_ggplot2.R
# load package
library(ggplot2)

# write function
label_facets <- function(string){
  len <- length(string)
  string = paste('(', letters[1:len], ') ', string, sep = '')
  return(string)
}

## mathjax.html
<script src="https://cdnjs.cloudflare.com/ajax/libs/mathjax/2.7.5/latest.js?config=TeX-AMS_HTML" async></script>
<script type="text/x-mathjax-config">
MathJax.Hub.Config({
  tex2jax: {inlineMath: [['$','$'], ['\\(','\\)']]}
});
</script>

## .htaccess
# enable CORS policy
# https://gist.github.com/maxparm/3105526
<IfModule mod_rewrite.c>
  Header add Access-Control-Allow-Origin "*"
  Header add Access-Control-Allow-Methods: "GET,POST,OPTIONS,DELETE,PUT"
  Header add Access-Control-Allow-Headers: "Content-Type"

  RewriteEngine on
  RewriteBase /
</IfModule>