Introduction The shiny library [1] provides a graphical user interface (GUI) for the R language that may open up new possibilities for human judgement in data filtering, as well as for the use of R by those who choose not to learn its syntax. The first category is the intended audience ... [Read more...]

Sorry about the noisy post title, but it happens to be the name of the book I was working on in the past year, which has been just published at Packt: Although I do not think that reading this ~400 page book will turn everyone into a true master of R ... [Read more...]

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Forecasting refers to the process of using statistical procedures to predict future values of a time series based on historical trends. For businesses, being able gauge expected outcomes for a given time period is essential for managing marketing, planning, and finances. For example, an advertising agency may want to utilizes ... [Read more...]

Today I finished two projects that had been on my mind for a while: Try out ggvis, the interactive successor to ggplot2 Create interactive scatterplots of census data You can see the resulting shiny app here. The app lets you create a scatterplot of any pair of demographic variables that ... [Read more...]

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If you have ever retrieved data from Twitter, Facebook or Instagram with R, you might have noticed a strange phenomenon. While R seems to be able to display some emoticons properly, many other times it doesn’t, making any further analysis impossible unless you get rid of them. With a ... [Read more...]

I am often asked about the number of subjects needed to study a binary outcome, which usually leads to a discussion of confidence intervals for binary proportions, and the associated precision. Sometimes the precision is quantified as the width or half-width of a 95% confidence interval. For proportions, I like the ... [Read more...]

If you work with both Matlab and R, the R.matlab package maintained by Henrik Bengtsson on CRAN helps you to connect the two environments by allowing you to read and write Matlab's MAT data file format from R (even if you don't have Matlab installed). This allows you to ... [Read more...]

I’m teaching a short graduate seminar on Data Visualization with R this semester. Following Matt Salganik, I wanted students to be able to submit homework or other assignments as R Markdown files, but to have a way to make sure their R code passed some basic stylistic checks provided ... [Read more...]

I was very happy to find out that, in the latest version (4.2.1) of Oracle Big Data Lite VM, all the R-related issues I had located and reported in the past (see here and here) have been resolved. Nevertheless, some new issues have emerged. Below are my findings and workarounds (if ... [Read more...]

I will be teaching a course on statistical regression models for repeated measurements data, and I thought of creating a shiny app to let students run the code used in the course and examine the output in real time.The app is still in development mode ... [Read more...]

I will be teaching a course on statistical regression models for repeated measurements data, and I thought of creating a shiny app to let students run the code used in the course and examine the output in real time.The app is still in development mode ... [Read more...]

Linear Mixed effect Models are becoming a common statistical tool for analyzing data with a multilevel structure. I will start by introducing the concept of multilevel modeling where we will see that such models are a compromise between two extreme: complete pooling and no pooling. Then I will present a ... [Read more...]

If you have ever retrieved data from Twitter, Facebook or Instagram with R, you might have noticed a strange phenomenon. While R seems to be able to display some emoticons properly, many other times it doesn’t, making any further analysis imposs... [Read more...]

The Statistical Disclosure Limitation (SDL) problem involves modifying a data set in such a manner that statistical analysis on the modified data is reasonably close to that performed on the original data, while preserving the privacy of individuals in the data set. For instance, we might have a medical data ... [Read more...]

Earlier today, Josh sent the text below in this message to the R-SIG-Finance list as the very first heads-up concerning the 2016 edition of our successful R/Finance series. We are once again very excited about our conference, thrilled about upcoming keynotes (some of which are confirmed and some of which ... [Read more...]

Earlier today, Josh sent the text below in this message to the R-SIG-Finance list as the very first heads-up concerning the 2016 edition of our successful R/Finance series. We are once again very excited about our conference, thrilled about upcoming keynotes (some of which are confirmed and some of which ... [Read more...]

For a JavaScript-based project I’m working on, I need to be able to sample from a variety of probability distributions. There are ways to call R from JavaScript, but they depend on the server running R. I can’t depend on that. I need a pure JS solution. I ... [Read more...]

Extending genomation to work with paired-end BAM files Extending genomation to work with paired-end BAM files Accelerate functions responsible for reading genomic files Parallelizing data processing in ScoreMatrixList Arithmetic, indicator and logic operations as well as subsetting work on ScoreMatrix objects Improvements and new arguments in visualization functions Faster heatmaps ... [Read more...]