1481 search results for "tutorial"

R Tutorial on Reading and Importing Excel Files into R

April 2, 2015
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R Tutorial on Reading and Importing Excel Files into R

Why an R Tutorial on Reading and Importing Excel Files into R is necessary As most of you know, Excel is a spreadsheet application developed by Microsoft. It is an easy accessible tool for organizing, analyzing and storing data in tables and has a widespread use in many different application fields all over the world. The post

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Short R tutorial: Scraping Javascript Generated Data with R

March 15, 2015
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Short R tutorial: Scraping Javascript Generated Data with R

When you need to do web scraping, you would normally make use of Hadley Wickham’s rvest package. This package provides an easy to use, out of the box solution to fetch the html code that generates a webpage. However, when the website or webpage makes use of JavaScript to display the data you’re interested in, The post

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Going deeper with dplyr: New features in 0.3 and 0.4 (video tutorial)

March 8, 2015
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In August 2014, I created a 40-minute video tutorial introducing the key functionality of the dplyr package in R. dplyr continues to be my "go-to" package for data exploration and manipulation because of its intuitive syntax, blazing fast performance, ...

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R Markdown Tutorial by RStudio and DataCamp

March 1, 2015
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R Markdown Tutorial by RStudio and DataCamp

In collaboration with Garrett Grolemund, RStudio’s teaching specialist, DataCamp has developed a new interactive course to facilitate reproducible reporting of your R analyses. R Markdown enables you to generate reports straight from your R code, documenting your works as an HTML, pdf or Microsoft document. This course is part of DataCamp’s R training path, but can The post

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drat Tutorial: Publishing a package

February 22, 2015
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Introduction The drat package was released earlier this month, and described in a first blog post. I received some helpful feedback about what works and what doesn't. For example, Jenny Bryan pointed out that I was not making a clear enough distinction between the role of using drat to publish code, and using drat to...

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An R tutorial for Microsoft Excel users

February 16, 2015
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If you currently use a spreadsheet like Microsoft Excel for data analysis, you might be interested in taking a look at this tutorial on how to transition from Excel to R by Tony Ojeda. The tutorial explains how to use R functions in place of Excel formulas, including tools like =AVERAGE and =VLOOKUP. For the most part, it uses...

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drat Tutorial: First Steps towards Lightweight R Repositories

February 7, 2015
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Now that drat is on CRAN and I got a bit of feedback (or typo corrections) in three issue tickets, I thought I could show how to quickly post such an interim version in a drat repository. Now, I obviously already have a checkout of drat. If you, dear reader, wanted to play along and create your...

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Tutorial on High-Performance Computing in R

February 3, 2015
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Tutorial on High-Performance Computing in R

I wanted to call your attention to what promises to be an outstanding tutorial on High-Performance Computing (HPC) in R, presented in Web streaming format. My Rth package coauthor Drew Schmidt, who is also one of the authors of the pbdR package, will be one of the presenters.  Should very interesting and useful.

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A data.table R tutorial by DataCamp: intro to DT[i, j, by]

February 3, 2015
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A data.table R tutorial by DataCamp:  intro to DT[i, j, by]

This data.table R tutorial explains the basics of the DT command which is core to the data.table package. If you want to learn more on the data.table package, DataCamp provides an interactive R course on the data.table package. The course has more than 35 interactive R exercises – all taking place in the comfort of The post

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GPU Tutorial, with R Interfacing

January 24, 2015
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GPU Tutorial, with R Interfacing

You’ve heard that graphics processing units — GPUs — can bring big increases in computational speed.  While GPUs cannot speed up work in every application, the fact is that in many cases it can indeed provide very rapid computation.  In this tutorial, we’ll see how this is done, both in passive ways (you write only … Continue reading...

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