As I often manipulate time series from different sources, I rarely come across the same date format twice. Having to reformat the dates every time is a real waste of time because I never remember the syntax of the as.Date function. I put below a few examples that turn strings into standard R date format.
Reot: Empirical Orthogonal Teleconnections in R
We are happy to introduce Reot, an R package designed for empirical orthogonal teleconnection (EOT) analysis of gridded geo-scientific space-time data based on the method by van den Dool...
Publishing in GitHub
Publishing in GitHub Publishing in GitHubI struggled to make my first repository in GitHub. I finally found out the steps to...
Database for chronic malignancies
Dear all, recently I have designed a database for Multiple Myeloma, which can easily be extended to include other malignancies and chronic diseases.The database and its guide can be...
Physignal Input is 3D Array Only
Geomorph users,The function physignal() in version 2.0 has a mistake in the manual regarding the input matrix: only 3D array can be used at this time. The next version will have...
Diving into H2O
by Joseph Rickert One of the remarkable features of the R language is its adaptability. Motivated by R’s popularity and helped by R’s expressive power and transparency developers working...
dplyr Example #1
Hadley Wickam released the dplyr package in January 2014. Since then I have been itching to give it a try as it has been suggested to speed up some...
R Interface to Myfxbook
Myfxbook provides an interface to your FOREX trading accounts as well as an active trading community. It has a broad range of functionality including a responsive interface to the...
Make your ggplots shareable, collaborative, and with D3
Editor's note: This is a guest post from Matt Sundquist form the Plot.ly team.You can access the source code for this post at https://gist.github.com/sckott/10991885Ggplotly and
How Fast the Fastest Human Would Run 100m?
Ethan Siegel wrote a post entitled The Math of the Fastest Human Alive five years ago, using regressions. An alternative is too use extreme value models (I wrote a post a...
Bitsanity
BitsanityThe awesome folks at Quandl (an amazing data collection and distribution service) have been so kind as to allow me to write for their blog.In my first post for...
Why writing vectorized code in R is a good idea
As a language for statistical computing, R has always had a bias towards linear algebra, and is optimized for operations dealing in complete vectors and matrixes. This can be...
Using R — Working with Geospatial Data (and ggplot2)
This is a follow-up blog-post to an earlier introductory post by Steven Brey: Using R: Working with Geospatial Data. In this post, we’ll learn how to plot geospatial data in...
Modeling Data With Functional Programming In R – Chapter 1
I’m pleased to announce that a rewrite of my first chapter of “Modeling Data With Functional Programming In R” is …Continue reading →
Vectorization in R: Why?
Here are my notes from a recent talk I gave on vectorization at a Davis R Users’ Group meeting. Thanks to Vince Buffalo, John...
Geomorph 3D Visualization
Dear geomorph users,version 2.0 of geomorph brings new developments in how shape deformations from 3D coordinate shape data can be viewed. We have implemented warping of 3D surface files...
Geomorph Version 2.0 Now Available!
Geomorph users,We have uploaded version 2.0 to CRAN. The windows and mac binaries have been compiled and the tarball is available.Version 2.0 comes with substantial changes and new features: New function...
R Courses in Milan (Italy): May 2014
Dear R users, the May 2014 public training course schedule for Milano (Italy) based courses is as follows: Web Applications with R and Shiny May 15, 2014 Reports in...
Errors on percentage errors
The MAPE (mean absolute percentage error) is a popular measure for forecast accuracy and is defined as where denotes an observation and denotes its forecast, and the...
Checking (G)LM model assumptions in R
(Generalized) Linear models make some strong assumptions concerning the data structure: Independance of each data points Correct distribution of the residuals Correct specification of the variance structure Linear relationship...
Topic Modeling In R
Editor's note: This is the first in a series of posts from rOpenSci's recent hackathon.I recently had the pleasure of participating in rOpenSci's hackathon. To be honest,...
Accessing Open Data Portal (India) using APIs
As I mentioned in my previous blog post, Government of India have started an Open Data Portal for making various data public. Most of the data-sets on the portal...
Visualizing Age-Length Keys — More
I recently posted on the addition of ageKeyPlot() to the FSA package for visualizing age-length keys. Since that post, I have added one more type of plot as illustrated...
Oracle’s Strategy for Advanced Analytics
At Oracle our goal is to enable you to get timely insight from all of your data. We continuously enhance Oracle Database to allow workloads that have traditionally required...
Investigating the relationship between gold and bitcoin prices with R.
Image by Ennio Pozzetti In this post I will explore some of the movements in markets in recent years, these movements have caught many by surprise resulting in...
Wealth and Skill | A Talk to Students
I enjoyed talking to University of Alabama students this morning about wealth, skill, and luck. I tried to synthesize a whole lot of research into something meaningful. Of course,...
Quantitative Finance Applications in R – 5: an Introduction to Monte Carlo Simulation
by Daniel Hanson Last time, we looked at the four-parameter Generalized Lambda Distribution, as a method of incorporating skew and kurtosis into an estimated distribution of market returns, and...
googleVis 0.5.1 released on CRAN
GoogleVis 0.5.1 was released on CRAN yesterday. New Features New functions gvisSankey, gvisAnnotationChart, gvisHistogram,gvisCalendar and gvisTimeline to support the new Google charts of the same names (without 'gvis'). New...
Use of freqparcoord for Regression Diagnostics
This is the third in my series of three posts on my package freqparcoord with Yingkang Xie. (My next post after this will show how to use R to...
Plotly: collaborative, publication-quality graphing. 
