4768 search results for "git"

Introduction to R and ggplot2 course

December 6, 2013
By

This course is about getting to grips with the basics of the R command line for basic data analysis and visualisation. There's a focus on maps and ggplot2. The first part of the course uses Rich Harris's "Short Introduction to R" (here). The second part works through an "Introduction to Spatial Data and ggplot2" (Cheshire and Lovelace, 2013), which can be found...

Read more »

Incidental Parameters Problem with Binary Response Data and Unobserved Individual Effects

December 5, 2013
By
Incidental Parameters Problem with Binary Response Data and Unobserved Individual Effects

It is a well known problem that in some models as the number of observations becomes large, econometric estimators fail to converge on consistent estimators.  The leading case of this is when estimating a binary response model with panel data with...

Read more »

24 Days of R: Day 5

December 5, 2013
By
24 Days of R: Day 5

Some time back, I started a project on GitHub wherein I would explore the efficacy of financial literacy efforts in the area where I live. This is done with the support of a local non-profit organization. As a first step, I tried to draw a picture of the area at a relatively fine level of

Read more »

New version of image.scale function

December 5, 2013
By
New version of image.scale function

Below is an updated version of the image.scale function. In the old version, one had to constantly use additional arguments to suppress axes and their labels. The new version contains the additional arguments axis.pos (1, 2, 3, or 4) for defining the s...

Read more »

My first… plot (.ly): beautiful plots with Plotly

December 5, 2013
By
My first… plot (.ly): beautiful plots with Plotly

Dear R-enthusiastic, I discovered Plotly some days ago, and I was fascinated by it. What is Plotly? Plotly is a service for creating and sharing data visualizations that also offers statistical analysis tools plus a robust API, the ability to … Continue reading →

Read more »

My current R projects at the end of 2013

December 4, 2013
By

I have been meaning to write a long post explaining each of the major R projects I am currently working on, but I can't seem to find the time to get to them. Instead, I give you a short summary of a few R projects/experiments/ideas I am kicking around....

Read more »

Averaged Input Assumptions and Momentum

December 4, 2013
By
Averaged Input Assumptions and Momentum

Today I want to share another interesting idea contributed by Pierre Chretien. Pierre suggested using Averaged Input Assumptions and Momentum to create reasonably quiet strategy. The averaging techniques are used to avoid over-fitting any particular frequency. To create Averaged Input Assumptions we combine returns over different look-back periods, giving more weight to the recent returns,

Read more »

a public list of R freelancers

December 4, 2013
By

tl,dr: If you want to be contacted for freelance R work, edit this list https://github.com/isomorphisms/hire-an-r-programmer/blob/master/README.md.   Background/Problem: I was looking for a list of R-programming freelancers and realised there is no such list. Other than famous people and people I already talk to, I don’t know even a small fraction of the R community—let alone people who do R...

Read more »

a public list of R freelancers

December 4, 2013
By

tl,dr: If you want to be contacted for freelance R work, edit this list https://github.com/isomorphisms/hire-an-r-programmer/blob/gh-pages/README.md.   Background/Problem: I was looking for a list of R-programming freelancers and realised there is no such list. Other than famous people and people I already talk to, I don’t know even a small fraction of the R community—let alone people who do R among other...

Read more »

R – Analyze any data frame in Saiku

December 4, 2013
By
R – Analyze any data frame in Saiku

In my previous article I have shown how R can be used to analyze PostgreSQL tables in Saiku using dynamically generated OLAP cubes. Today I will show you how you can analyze any R data frame in Saiku. WIth Saiku you can easily create excel-like pivot t...

Read more »