November 2017

information retrieval document search using vector space model in R

November 4, 2017 | suresh kumar Gorakala

Introduction:In this post, we learn about building a basic search engine or document retrieval system using Vector space model. This use case is widely used in information retrieval systems. Given a set of documents and search term(s)/query we need to retrieve relevant documents that are similar to ...

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tint 0.0.4: Small enhancements

November 3, 2017 | Thinking inside the box

A maintenance release of the tint package arrived on CRAN earlier today. Its name expands from tint is not tufte as the package offers a fresher take on the Tufte-style for html and pdf presentations. A screenshot of the pdf variant is below. Thi... [Read more...]

Taming exam results in pdf with pdftools

November 3, 2017 | mareviv

You can also check this post, written in #blogdown, here: taming-exam-results-with-pdf. Introduction There are several ways to mine tables and other content from a pdf, using R. After a lot of trial & error, here’s how I managed to extract … Sigue leyendo →

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New RStudio cheat sheet: Strings in R

November 3, 2017 | David Smith

The RStudio team has created another very useful cheat sheet for R: Working with Strings. This cheat sheet provides an example-laden menu of operations you can perform on strings (character verctors) in R using the stringr package. While base R provides a solid set of string manipulation functions, the stringr ... [Read more...]

How to identify risky bank loans using C.50 decision trees

November 3, 2017 | Packt Publishing

This tutorial has been taken from Machine Learning with R Second Edition by Brett Lantz. Use the code MLR250RB at the checkout to save 50% on the RRP. Or pick up this title with 4 others for just $50 – get the R-Bloggers bundle. The global financial crisis of 2007-2008 highlighted the importance ...

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Let X=X in R

November 3, 2017 | John Mount

Our article "Let’s Have Some Sympathy For The Part-time R User" includes two points: Sometimes you have to write parameterized or re-usable code. The methods for doing this should be easy and legible. The first point feels abstract, until you find yourself wanting to re-use code on new projects. ...

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I, For One, Welcome Our Forthcoming New robots.txt Overlords

November 3, 2017 | hrbrmstr

Despite my week-long Twitter consumption sabbatical (helped — in part — by the nigh week-long internet and power outage here in Maine), I still catch useful snippets from folks. My cow-orker @dabdine shunted a tweet by @terrencehart into a Slack channel this morning, and said tweet contained a link to this little ...

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Gold-Mining – Week 9 (2017)

November 2, 2017 | Michael Griebe

Week 9 Gold Mining and Fantasy Football Projection Roundup now available. Go get that free agent gold! The post Gold-Mining – Week 9 (2017) appeared first on Fantasy Football Analytics. [Read more...]

Evaluating Exam Questions using Crowdmark, IRT, and the Generalized Partial Credit Model

November 2, 2017 | Jack Davis

Making good exam questions is universally hard. The ideal question should have a clear solution to those with the requisite understanding, but also difficult enough that someone without the knowledge needed can guess at an answer.An item response theory (IRT) based analysis can estimate the difficulty of a question, ... [Read more...]

Predictive Analytics Tutorial: Part 1

November 2, 2017 | Laura Ellis

Part 1 of 4 in a tutorial showing how to perform end to end predictive analytics to solve your business problem. The tutorial uses R notebooks, Data Science Experience and IBM Cloud.

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Building a Corporate R Package

November 2, 2017 | Steven M. Mortimer

Analytical Functions Company Constants Templating/Formatting Data Source Connections Tutorials Analytical Functions Creating functions is a programming best practice. They are easier to monitor, test, and teach to others. If your team performs routine calculations, establish a standard by adding functions to the shared library and encourage everyone to use ... [Read more...]

Problems In Estimating GARCH Parameters in R

November 2, 2017 | ntguardian

In this post I detail problems that emerge when trying to estimate the parameters of GARCH models.

$\text{GARCH}(1,1)$

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Role Playing with Probabilities: The Importance of Distributions

November 2, 2017 | Guest Blogger

by Jocelyn Barker, Data Scientist at Microsoft I have a confession to make. I am not just a statistics nerd; I am also a role-playing games geek. I have been playing Dungeons and Dragons (DnD) and its variants since high school. While playing with my friends the other day it ... [Read more...]

Exploring, Clustering, and Mapping Toronto’s Crimes

November 2, 2017 | Susan Li

Motivation I have had a lot of fun exploring The US cities’ Crime data via their Open Data portals. Because Toronto’s crime data was simply not available. Not until the summer of this year, Toronto police launch a public safety data portal to increase transparency between the public and ...

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Yet-Another-Power Outages Post : Full Tidyverse Edition

November 2, 2017 | hrbrmstr

This past weekend, violent windstorms raged through New England. We — along with over 500,000 other Mainers — went “dark” in the wee hours of Monday morning and (this post was published on Thursday AM) we still have no utility-provided power nor high-speed internet access. The children have turned iFeral, and being a ...

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shadow text effect in grid and ggplot2 graphics

November 2, 2017 | R on Guangchuang Yu

After the release of meme package, I received several feedbacks from users. The most usefule one is the comment on my blog post: Sercan Kahveci Greetings Mr. Yu, I am very happy that this package exists. Thank you for making it! I would like to request a feature, to ensure ...

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Acquiring data for language research (3/3): web scraping

November 1, 2017 | R on francojc ⟲

Web scraping There are many resources available through direct downloads from repositories and individual sites and R package interfaces to web resources with APIs, but these resources are relatively limited to the amount of public-facing textual data recorded on the web. In the case that you want to acquire data ...

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Explore Predictive Maintenance with flexdashboard

November 1, 2017 | Dr. Shirin Glander

I have written the following post about Predictive Maintenance and flexdashboard at my company codecentric’s blog: Predictive Maintenance is an increasingly popular strategy associated with Industry 4.0; it uses advanced analytics and machine learni...

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Explore Predictive Maintenance with flexdashboard

November 1, 2017 | Shirin's playgRound

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Image Convolution in R using Magick

November 1, 2017 | rOpenSci - open tools for open science

Release 1.4 of the magick package introduces a new feature called image convolution that was requested by Thomas L. Pedersen. In this post we explain what this is all about. Kernel Matrix The new image_convolve() function applies a kernel over the image. Kernel convolution means that each pixel value is ... [Read more...]

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R-bloggers

R news and tutorials contributed by hundreds of R bloggers

November 2017

information retrieval document search using vector space model in R

tint 0.0.4: Small enhancements

Taming exam results in pdf with pdftools

New RStudio cheat sheet: Strings in R

How to identify risky bank loans using C.50 decision trees

Let X=X in R

I, For One, Welcome Our Forthcoming New robots.txt Overlords

Gold-Mining – Week 9 (2017)

Evaluating Exam Questions using Crowdmark, IRT, and the Generalized Partial Credit Model

Predictive Analytics Tutorial: Part 1

Building a Corporate R Package

Problems In Estimating GARCH Parameters in R

Role Playing with Probabilities: The Importance of Distributions

Exploring, Clustering, and Mapping Toronto’s Crimes

Yet-Another-Power Outages Post : Full Tidyverse Edition

shadow text effect in grid and ggplot2 graphics

Acquiring data for language research (3/3): web scraping

Explore Predictive Maintenance with flexdashboard

Explore Predictive Maintenance with flexdashboard

Image Convolution in R using Magick

November 2017

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