2615 search results for "gis"

Quickly adapt starting values in MCMC using paste()

January 15, 2011
By
Quickly adapt starting values in MCMC using paste()

Waiting for convergence of MCMC models can take some time, therefore it may be a good idea to use better starting values. Using paste, one can quickly convert any (parameter) vector in the workspace into a R-style vector (with c()). Here's a function t...

Read more »

Webinar on Portfolio Design, Optimization and Stability Analysis, Jan 26

January 14, 2011
By

We're very excited to host a new webinar from some of the leading researchers in portfolio design: Diethelm Würtz and Mahendra Mehta for the Rmetrics Association. This webinar will give an overview on current and recent developments and tools for portfolio design, optimization and stability analysis with the R/Rmetrics software environment. This webinar will review content available in the...

Read more »

CosmoPMC released

January 12, 2011
By
CosmoPMC released

Martin Kilbinger, an astronomer (cosmologist) with whom we had worked on population Monte Carlo for cosmological inference , has made the PMC C codes available on the CosmoPMC webpage. He has also written a CosmoPMC manual that is now available from arXiv. And he very kindly associated me to

Read more »

table() in R

January 11, 2011
By

The table function in R is very useful, especially when working with survey data. Often you may have Likert scales for levels of agreement or satisfaction. table() quickly gives the distribution of answers, which can then be used for (bar)plots.However...

Read more »

table() in R

January 11, 2011
By

The table function in R is very useful, especially when working with survey data. Often you may have Likert scales for levels of agreement or satisfaction. table() quickly gives the distribution of answers, which can then be used for (bar)plots.However...

Read more »

Abusing Amazon’s Elastic MapReduce Hadoop service… easily, from R

January 10, 2011
By
Abusing Amazon’s Elastic MapReduce Hadoop service… easily, from R

JD Long's experimental segue package makes it easy to use Amazon's Elastic MapReduce service to fire up a Hadoop cluster and use it for non-Big Data, computationally-intensive tasks. The package provides a cluster-aware version of lapply() which "just works".

Read more »

Install R Packages wherever needed

January 10, 2011
By

I frequently occupy computers everywhere with extensive MCMC tasks. Installing R doesn't take long, but it can be very annoying if you manually have to install dozens of R packages before your code is able to run. Well, now I use the following command ...

Read more »

Install R Packages wherever needed

January 10, 2011
By

I frequently occupy computers everywhere with extensive MCMC tasks. Installing R doesn't take long, but it can be very annoying if you manually have to install dozens of R packages before your code is able to run. Well, now I use the following command ...

Read more »

General-purpose MCMC draw saver for R

January 10, 2011
By

If you do MCMC with R, you probably know how nasty "bookkeeping" of draws can be. So I quickly coded up a small function which does everything for you. Every parameter has to begin with "mcmc_" or another to-be-defined string, then just run mcmcsave...

Read more »

General-purpose MCMC draw saver for R

January 10, 2011
By

If you do MCMC with R, you probably know how nasty "bookkeeping" of draws can be. So I quickly coded up a small function which does everything for you. Every parameter has to begin with "mcmc_" or another to-be-defined string, then just run mcmcsave...

Read more »