Month: May 2013
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Meet the cloud that will keep you warm at night
You already have a physical presence at your customers, why not give them a distributed data center too? German company AoTerra is building OpenStack into their heating systems. Will the lower hardware and HVAC requirements out weight operating costs born of density in a traditional data center? I can’t wait to find out. http://gigaom.com/2013/05/24/meet-the-cloud-that-will-keep-you-warm-at-night/
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OpenShift.com – Now With R and rpy2
A couple of weeks ago, I announced successfully installing and running R/rpy2 on OpenShift.com Ok #OpenShift ers, and #Rstats geeks. I have rpy2 running on OpenShift. What's next? http://t.co/Hu781FRFWT — Erich Morisse (@emorisse) April 24, 2013 Now, you can grab the installation process and bits for yourself* through github. http://github.com/emorisse/ROpenShift *I’d prefer (and will be…
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Calculating Conditional Entropy in R
conditionalEntropy <- function( graph ) { # graph is a 2 or 3 column dataframe if (ncol(graph) == 2 ) { names(graph) <- c(“from”,”to”) graph$weight <- 1 } else if (ncol(graph) == 3) names(graph) <- c(“from”,”to”,”weight”) max <- length(rle(paste(graph$from, graph$to))$values) …