When processing large data sets in R you often also end up creating large temporary objects. In order to keep the memory footprint small, it is always good to remove...continue reading.
R News from another blog for R community
In this post I will show some different examples of how to work with map projections and how to plot the maps using ggplot. Many maps that are shown using...continue reading.
In this post I show some R-examples on how to perform power analyses for mixed-design ANOVAs. The first example is analytical — adapted from formulas used in G*Power (Faul et...continue reading.
The feed-forward neural network is a very powerful classification model in the machine learning content. Since the goodness-of-fit of a neural network is majorly dominated by the model complexity, it...continue reading.
Sometimes a minor change to your R code can make a big difference in processing time. Here is an example showing that if you’re don’t care about the names attribute...continue reading.
In the example below, 552 rows are extracted from a data frame with 10 million rows using six different methods. Results show a significant disparity between the least and the...continue reading.
data.table (http://datatable.r-forge.r-project.org/) inherits from data.frame and provides functionality in fast subset, fast grouping, and fast joins. In previous posts, it is shown that the shortest CPU time to aggregate a...continue reading.
After posting “Removing Records by Duplicate Values” yesterday, I had an interesting communication thread with my friend Jeffrey Allard tonight regarding how to code this in R, a combination of...continue reading.