March 2016

From spss to R, part 3

March 1, 2016 | Roel M. Hogervorst

In this post we will start with a build-in dataset and some basic ggplot graphics. In the next post we will combine dplyr and ggplot to do awesome stuff with the Dutch University student counts from the previous lessons. We will work with the build-in dataset mtcars. There are many ...
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Revisiting Data-driven Marketing, part II

March 1, 2016 | Florian Teschner

In the last post, I discussed how the current digital measurement approach is biased towards targeted ad buying. The key reason is that ad effectiveness is calculated on a cost per order/conversion basis. As particular user segments -which are addressed with digital targeting- have a high base purchase probability, ... [Read more...]

Amazonish warning

March 1, 2016 | xi'an

As in previous years, I want to repost a warning to ‘Og readers that all http links to Amazon.com [and much more rarely to Amazon.fr] products found on this ‘Og are actually susceptible to reward me with an advertising percentage if a purchase is made by the reader ... [Read more...]

50% Draft of Forthcoming Book Available

March 1, 2016 | matloff

As I’ve mentioned here a couple of times, I am in the midst of writing a book, From Linear Models to Machine Learning: Regression and Classification, with Examples in R. As has been my practice with past books, I have now placed a 50% rough draft of the book on ... [Read more...]

FALSE: Clinton Funded by "Grassroots"

March 1, 2016 | Francis Smart

The blatant distortions of reality put forth by the Clinton campaign are so offensive as to be laughable at times. In the victory speech of Hillary Clinton in South Carolina she spent a significant portion of it talking about how her campaign is financed by "grassroots".Well, looking at the ...
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Learn R from the Ground Up

March 1, 2016 | Hamza Arab

R is an open source programming language which is made from the dialect of S. R programming is very power when dealing with Data Manipulation and Statistical Modelling. R is widely used by data scientist and can solve complex problems containing datasets with statistical computing. R has thousands of packages ...
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Analysing the movements of a cat

March 1, 2016 | Joseph Rickert

by Verena Haunschmid Since I have a cat tracker, I wanted to do some analysis of the behavior of my cats. I have shown how to do some of these things here. Data Collection The data was collected using the Tractive GPS Pet Tracker over a period of about one ... [Read more...]

A Gadget for tidyr

March 1, 2016 | Mango Blogger

By Aimee Gott About a month ago I wrote a review of the Shiny Developer Conference and I mentioned Shiny Gadgets, my new favourite thing in R. Over the last month I have played about with them and finally got … Continue reading → [Read more...]

Get-your-stuff-in-order exercises

March 1, 2016 | r-exercises

In the exercises below we cover the basics of ordering vectors, matrices and data frames. We consider both column-wise and row-wise ordering, single and multiple variables, ascending and descending sorting, and sorting based on numeric, character and factor variables. Before proceeding, it might be helpful to look over the help ... [Read more...]

A Silky Drawing and a Tiny Experiment

March 1, 2016 | aschinchon

It is a capital mistake to theorize before one has data (Sherlock Holmes, A Scandal in Bohemia) One of my favorite entertainments is drawing things: crazy curves, imaginary flowers, celestial bodies, fractalic acacias … but sometimes I wonder myself if these drawings result interesting to whom arrive to my blog. One ...
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