Access your data in Amazon Redshift and PostgreSQL with Python and R
So you want to start analyzing the data you have on Amazon Redshift or PostgreSQL with R or Python using NuMpy and Pandas. See how you can access your data.
May 2016
Explore Australian Elections Data with R
This is a guest post by my colleague Professor Di Cook, cross-posted from her Visiphilia blog. Di and I are two of the authors of the new eechidna package for R, now on CRAN.The eechidna package has just been posted on CRAN, in time for the longest ele... [Read more...]
rfoaas 0.1.9
Time for new release! We just updated rfoaas on CRAN, and it now corresponds to version 0.1.9 of the FOAAS API.
The rfoaas package provides an interface for R to the most excellent FOAAS service--which provides a modern, scalable and RESTful web ser... [Read more...]
Hierarchical Risk Parity Implementation in Rcpp and OpenMP
Summary
Recent research by Marcos Lopez de Prado
aims to improve Markowitz’s Critical Line Algorithm (CLA). The (currently
patent-pending) methodology proposes the Hierarchical Risk Parity (HRP)
approach which aims to tackle several issues with the original CLA:
instability, concentration, and underperformance.
HRP applies modern mathematics (graph theory and machine ... [Read more...]
Hierarchical Risk Parity Implementation in Rcpp and OpenMP
Summary
Recently, there has been a new research paper coming out with the goal of improving Markowitz’s Critical Line Algorithm (CLA) published by Marcos Lopez de Prado. The methodology is also currently patent pending and the paper can be downloaded here. The methodology suggested by the paper proposes the ...
DH Box – Digital Humanities Virtual Workbench
As well as offering digital application shelves, should libraries offer, or act as instituional sponsors of, digital workbenches? I’ve previously blogged about things like SageMathCloud, and application based learning environment, and the IBM Data Scientist Workbench, and today came across another example: DHBox, CUNY’s digital humanities lab in ...
another riddle with a stopping rule
A puzzle on The Riddler last week that is rather similar to an earlier one. Given the probability (1/2,1/3,1/6) on {1,2,3}, what is the mean of the number N of draws to see all possible outcomes and what is the average number of 1’s in those draws? The second question is straightforward, ...
First meetup of the Trento R User Group, North Italy
Our brand-new R User Group has met at Simposio Bar in Trento, Italy! The meetup started at 7pm and everything went smooth and fine.With Daniele and Emanuele, we founded the group on the 9th of May and our community grew quickly: now it counts 37 members. I met Leonardo, Francesca, ...
R for Publication by Page Piccinini: Lesson 0 – Introduction and Set-up
The pre-first lesson focuses on setting you up with RStudio and Git. As a reminder, there are some steps you should have done before starting this lesson: Install R. If you already have R installed, be sure it is the newest version. Install RStudio. Make sure that (e.g. LaTeX) ... [Read more...]
21+ Online Courses to Get Started Today with Data Cleaning
Yeah… working with data sets means that you have a way to get them first. After you get them you have to clean them. Data scientists spend 80% of their time in data cleaning and data manipulation and only 20% of their time actually analyzing it. And then you find yourself spending 80% ... [Read more...]
21+ Online Courses to Get Started Today with Data Cleaning
Data cleaning is essential to start analyzing your data set. Here are 21+ online courses to help you get started with your data wrangling efforts.
Slides from my Workshop: “Mapping Open Data in R”
On May 17 I had the pleasure of running a workshop at the Berkeley R Meetup. The workshop was titled “Mapping Open Data in R”, and I’ve had a few requests for the slides. You can see them below. The slides have code on them. If you would like to ... [Read more...]
Stop Shiny and Close Browser Together
I’ve been playing with shiny at work for a project Tyler and I have been pushing forward.
My Goal
We wanted to be able to deploy local instances of shiny app and then when user is done with session, the user can close out the session by closing t... [Read more...]
Stop Shiny and Close Browser Together
I’ve been playing with shiny at work for a project Tyler and I have been pushing forward.
My Goal
We wanted to be able to deploy local instances of shiny app and then when user is done with session, the user can close out the session by closing the ... [Read more...]
ggplot2 docs completely remade in D3.js
Carson Sievert from Plotly recreated Hadley Wickam’s entire ggplot2 documentation using Plotly’s open-source ggplotly converter – http://ropensci.github.io/plotly/ggplot2/. This makes every ggplot2 graph interactive and drawn in D3.js ! position_jitterdodge scale_color_brewer stat_summary_hex geom_violin geom_smooth geom_polygon geom_point ... [Read more...]
Power Curves in R Using Plotly ggplot2 Library
When performing Student’s t-test to compare the difference in means between two groups, it is a useful exercise to determine the effect of unequal sample sizes in the comparison groups on power. Formally, power can be defined as the probability of rejecting the null hypothesis when the alternative hypothesis ... [Read more...]
Your most valuable collaborator, future-you
I was recently at a R users meetup where Hadley Wickham talked about data wrangling. He showed some interesting stuff! Did you know that you can put a data frame into a data frame? You can make a list of data frames and add that list to your data frame. ... [Read more...]
Gerber Statistic Implementation in Rcpp and OpenMP
Summary
Recently new research has appeared on using a co-movement measure to
construct the covariance matrix as part of the Modern Portfolio Theory (MPT)
style portfolio construction. Below is the abstract of the
Gerber, Markowith and Pujara (2015) paper whose methodology is also currently patent pending:
Markowitz’s mean-variance MPT has ... [Read more...]
Gerber Statistic Implementation in Rcpp and OpenMP
By Yi, Nico, and Chris
Summary
Recently new research has appeared on using a co-movement measure to
construct the covariance matrix as part of the Modern Portfolio Theory (MPT)
style portfolio construction. Below is the abstract of the
Gerber, Markowith and Pujara (2015) paper whose methodology is also currently patent pending:
... [Read more...]
Your most valuable collaborator, future-you
I was recently at a R users meetup where Hadley Wickham talked about data wrangling. He showed some interesting stuff! Did you know that you can put a data frame into a data frame? You can make a list of data frames and add that list to your data frame. ...
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