Similar to yesterday's post about RcppGSL, we have another pure maintenance release to announce, this time of RcppClassic, the package supporting the deprecated older classic Rcpp API defined in the earlier 2005 to 2006 releases, is now on CRAN. Ther...
Monthly Archives: July 2012
Civic Data Challenge closes July 29
There's only a few days left to enter the Civic Data Challenge: entries are due before midnight EST on July 29 to qualify for the $100,000 in prizes. The competition, open to US residents, challenges particpants to applications and visualizations from civic health data. Prizes will be awarded by a panel of prestigious judges. Looks like a great opportunity...
How to tell when error bars correspond to a significant p-value
Can you tell when error bars based on 95 % CIs or standard errors correspond to a significant p-value? Don’t fret if you think it’s hard, a study from 2005 showed that researchers in psychogoly, behavior neuroscience and medicine had a hard time judging when error bars from two independent groups signified a significant difference.
The Failure of Asset Allocation – Bonds Are An Imperfect Hedge
US investors were spoiled by US Treasuries which acted as a near perfect hedge to stocks during the 2008-2009 crisis. However, in real crisis, bonds rarely offer any comfort, and asset allocation fails (see post Death Spiral of a Country and IMF ...
What’s wrong with LOESS for palaeo data?
Locally weighted scatterplot smoothing (LOWESS) or local regression (LOESS) is widely used to highlight “signal” in variables from stratigraphic sequences. It is a user-friendly way of fitting a local model that derives its form from the data themselves rather than having … Continue reading →
Williams designs with 5 products
In a previous post I created small Williams designs for an even number of products. This worked very well, also because the number of permutations could be restricted significantly due to symmetry. Unfortunately this does not work so well with an odd n...
renaming data frame columns in lists
Renaming the columns of data frames which are stored in lists of lists
OK, so the scenario is as follows:
- we have a...
RcppGSL 0.2.0
Earlier today, a minor update / maintenance release of RcppGSL---our interface package between R and the GNU GSL using our Rcpp package for seamless R and C++ integration---arrived on on CRAN. It contains a number of minor changes to accomodate chan...
Faster R in Hadoop: rmr 1.3 now available
The RHadoop project continues the Big Data integration of R and Hadoop, with a new update to its rmr package. Version 1.3 of rmr improves the performance of map-reduce jobs for Hadoop written in R. New features include: An optional vectorized API for efficient R programming when dealing with small records. Fast C implementations for serialization and deserialization from...
Deploy Rook Apps with rApache: Part I
Since rApache 1.1.15 you’ve been able to deploy you Rook applications like so:
# Run the Rook application named 'app'. On each request, the expression
# 'Rook::Server$call(app)' is evaluated in an environment populated by
# rookapp.R. 'app' is expected to be found in that environment.
<Location /test/RookApp>
SetHandler r-handler
...
Zero Inflated Models and Generalized Linear Mixed Models with R.
Zuur, Saveliev, Ieno (2012).
