Monthly Archives: May 2017

Euler Problem 19: Counting Sundays — When does the week start?

May 3, 2017
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Solution in R to Euler Problem 19: How many Sundays fell on the first of the month during the twentieth century (1 Jan 1901 to 31 Dec 2000)? Continue reading → The post Euler Problem 19: Counting Sundays — When does the week start? appeared first on The Devil is in the Data.

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Estimating the Size of a Demonstration

Estimating the Size of a Demonstration

Abstract Inspired by the recent March For Science we look into methods for the statistical estimation of the number of people participating in a demonstration organized as a march. In particular, we provide R code to reproduce the two on-the-spot counting method analysis of Yip et al. (2010) for the data of the July 1 March in Hong Kong...

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timekit: Time Series Forecast Applications Using Data Mining

timekit: Time Series Forecast Applications Using Data Mining

The timekit package contains a collection of tools for working with time series in R. There’s a number of benefits. One of the biggest is the ability to use a time series signature to predict future values (forecast) through data mining techniques. W...

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Technical Foundations of Informatics: A modern introduction to R

May 3, 2017
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Technical Foundations of Informatics: A modern introduction to R

Informatics (or Information Science) is the practice of creating, storing, finding, manipulating and sharing information. These are all tasks that the R language was designed for, and so Technical Foundations of Informatics, the online course guide for the University of Washington course of the same name, also provides an excellent resource for learning those skills using R. The course...

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Five advanced online R courses in Statistics.com that are starting soon (and a discount code for them)

May 3, 2017
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Five advanced online R courses in Statistics.com that are starting soon (and a discount code for them)

Five courses in R are starting tomorrow and the next two months on Statistics.com. You may use the code “2qR-blogger-17″ when registering (offering a reduced rate of $399 instead of,  around, $589 a course).  List of R courses: May 5: Mapping in R taught by Chris Brunsdon, (Director of the National Centre for Geocomputation, at the National University of Ireland, and...

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Machine Learning Classification with C5.0 Decision Tree Algorithm

Machine Learning Classification with C5.0 Decision Tree Algorithm

We will develop a classification exercise using C5.0 decision tree algorithm. The exercise was originally published in "Machine Learning in R" by Brett Lantz, PACKT publishing 2015 (open source community experience destilled).The example we will develop is about identifying risky bank loans.

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Error installing latest R version (3.4.0) on Windows

May 3, 2017
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If you’re getting the following error when you’ve installed R 3.4.0 on Windows, you’re not alone. Error in if (file.exists(dest) && file.mtime(dest) > file.mtime(lib) && : missing value where TRUE/FALSE needed The R team have released a patched version but The post Error installing latest R version (3.4.0) on Windows appeared first on Locke Data. Locke...

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Machine Learning Classification with 1R and RIPPER Rule Learners (Edible/Poisonous Mushrooms)

Machine Learning Classification with 1R and RIPPER Rule Learners (Edible/Poisonous Mushrooms)

We will develop a classification example using 1R and RIPPER rule learners algorithms. The exercise was originally published in "Machine Learning in R" by Brett Lantz, PACKT publishing 2015 (open source community experience destilled).The example we will develop is about classifying edible and poisonous mushrooms.

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Sinew: a R Package to create self-populating roxygen2 skeletons

May 3, 2017
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Sinew is a R package that generates a roxygen2 skeletons populated with information scraped from within the function script. The goal of the package is to automate nearly all of the mundane tasks needed to document functions, properly set up the import fields for oxygenation, and make it easier to attain documentation consistency across functions.  Functionality makeOxygen: … Continue...

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Data Science for Operational Excellence (Part-5)

May 3, 2017
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Data Science for Operational Excellence (Part-5)

Operations need to have demand forecasts in order to establish optimal resource allocation policies. But, when we make predictions the only thing that we assure is the occurrence of prediction errors. Fortunately, there is no need to be 100% accurate to succeed, we just need to perform better than our competitors. In this exercise we Related exercise sets:

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