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I'll be giving a talk ("Applied Predictive Modeling") to the Central Iowa R User Group on Thursday night at 6:00 PM to 8:00 PM (CST). It looks like it will be broadcast live on YouTube. The link is http://... [Read more...]

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[This article was first published on Reimagined Invention, and kindly contributed to R-bloggers]. (You can report issue about the content on this page here) Want to share your content on R-bloggers? click here if you have a blog, or here if you don't. [Read more...]

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The NCI-60 cancer cell line panel has been used over the course of several decades as an anti-cancer drug screen. This panel was developed as part of the Developmental Therapeutics Program (DTP) of the U.S. National Cancer Institute (NCI). Thousands of compounds have been tested on the NCI-60, which ... [Read more...]

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Data analyses are the product of many different tasks, and statistical methods are one key aspect of any data analysis. There is a common workflow in the related areas of informatics, data mining, data science, machine learning, and statistics. The workflow tasks include data preparation, the development of predictive mathematical ... [Read more...]

Shiny is a web framework for R developers. Shiny allows users to develop websites that help present their analyses to users by allowing the analyses to be interactive through a web-based interfaces. Shiny web-interfaces are programmed in R without the need to develop anything in HTML, CSS, or Javascript, although ... [Read more...]

Consider here the case where, in some parametric inference problem, parameter  is a point in the Simplex, For instance, consider some regression, on compositional data, __ library(compositions) __ data(DiagnosticProb) __ Y=DiagnosticProb[,"type"]-1 __ X=DiagnosticProb[,c("A","B","C")] __ model = glm(Y~ilr(X),family=binomial) __ b = ilrInv(coef(model)[... [Read more...]

R is a programming language developed by data analysts for data analysts. It offers many features that make a powerful tool for data exploration. Some basic features need to be understood to begin programming in R. The following presentation covers some of these features including working with variables, vectors and ... [Read more...]

Geo-Distances are of great importance: Researchers from various disciplines refer to geographic distances – health researchers refer to geographic data when analyzing the spread of diseases, economists when evaluating the impact of transaction costs on human behavior, or sociologists when evaluating interpersonal distances (based on external factors) in human interaction. However, ... [Read more...]

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R Markdown is an amazing tool that allows you to blend bits of R code with ordinary text and produce well-formatted data analysis reports very quickly. You can export the final report in many formats... [Read more...]

R Markdown is an amazing tool that allows you to blend bits of R code with ordinary text and produce well-formatted data analysis reports very quickly. You can export the final report in many formats like HTML, pdf or MS Words which makes it easy to sh... [Read more...]

R is a powerful language and environment for statistics and scientific graphics. Some of the main advantages of R is that is free/open-source and users can find a lot of help online. RStudio provides free interface to R that has an organized layout and many extra options for R ... [Read more...]

In a previous post I showed an animated age structure diagram depicting output from a simple population model written in Excel.  Here is another version of that model written in R.  One of the things I like about the R version is that I can post the animated .gif files ... [Read more...]

In a previous post I showed an animated age structure diagram depicting output from a simple population model written in Excel.  Here is another version of that model written in R.  One of the things I like about the R version is that I can p... [Read more...]

Version 0.1.1 of the package stplanr has been released on CRAN. This is a major update with many new functions and a new class definition, SpatialLinesNetwork, for route planning and network analysis using igraph. This short post, by myself and package co-author Richard Ellison describes how stplanr can be used for ... [Read more...]