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@dirkschumacher
dirkschumacher / 20170509_bug_roi.R
Created May 9, 2017
Bounds on binary variables seem to be ignored in ROI (ROI_0.2-1)
View 20170509_bug_roi.R
# Bug report
# It seems variable bounds are ignored when using binary variables "B".
# It works as expected if variables of type "I" are used
library(ROI)
library(ROI.plugin.glpk)
# max: x1 + x2 + x3 + x4
# s.t. x1 + x2 + x3 + x4 <= 4
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@dirkschumacher
dirkschumacher / bvg.R
Last active Jul 29, 2016
Query BVG billing data from gmail with R
View bvg.R
# Use this code if you use the official BVG Berlin app
# I only tested it with credit card billing
# The BVG sends you an email for every purchase you make.
# The following code tries to find all those mails and analyzes them.
library(gmailr)
library(purrr)
library(stringr)
library(lubridate)
View gist:c0c1d78c721aa4fe2adc
= The news reads us data in Neo4J
Data by: http://newsreadsus.okfn.de/
== Intro
Interesting data created by http://newsreadsus.okfn.de/.
I converted the data from the links.json file and converted it into two simple csv files.
//setup
[source,cypher]
----
LOAD CSV FROM "https://dl.dropboxusercontent.com/s/riz5hp32mz0jzed/sites.csv?dl=1" AS csvline
@dirkschumacher
dirkschumacher / gist:39b47a50f39e52deacf6
Last active Aug 29, 2015
Donations to German parties
View gist:39b47a50f39e52deacf6
= Donations to German parties
data from here: https://github.com/pudo/kompromatron
== Sample Data Set
//setup
[source,cypher]
----
LOAD CSV WITH HEADERS FROM "https://raw.githubusercontent.com/pudo/kompromatron/master/data/spenden.csv" AS data
WITH data SKIP 0 LIMIT 375
MERGE (p:Party { name: data.partei_name, acronym: data.partei_acronym})
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