A tutorial by D.M. Wiig This tutorial is posted as an embedded Word document.  To view the document full screen click on the button in the lower right corner of the window. Please note that you must be online for the full page Word document display to... [Read more...]

The R package development is a complex process of creating (mostly) a useful software, that will (probably) be used by other users. This means the provided tool should be resistant, immune, well tested and properly documented. Developers from many dif... [Read more...]

googleformr For the past few months I’ve been toying with the idea of using googleformr to empower data science-oriented instructors to use data science in their workflow. In this 2-part series of posts, I’ll show how to AppScripts and R to turn... [Read more...]

googleformr For the past few months I’ve been toying with the idea of using googleformr to empower data science-oriented instructors to use data science in their workflow. In this 2-part series of posts, I’ll show how to AppScripts and R to turn... [Read more...]

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In a brief diversion from the simecol dynamic system models, which I promise to resume in the future, I'll start another series of entertaining posts about solving mathematical/logic puzzles using R, of which this post you're reading is the first. This time around, we'll take a crack at the ... [Read more...]

Joe Thorley at Poisson Consulting has released a new R package, rtide, (on which I am listed as a co-author) that provides the ability to predict future (and past) tide heights for 637 different tide stations in the United States and associated territories. The underlying data, consisting of tide harmonic constituents, ... [Read more...]

This animated gif  shows changes in annual mean temperature at 12 East Coast USA airports that had continuous daily data for the 1950 – 2015 period. The data was retrieved from Weather Underground using the R weatherData package . 11 … Continue reading → [Read more...]

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Spark 2.0 has been released since last July but, despite the numerous improvements and new features, several annoyances still remain and can cause headaches, especially in the Spark machine learning APIs. Today we’ll have a look at some of them, inspired by a recent answer of mine in a Stack ... [Read more...]

Previously in this series: Cleaning and visualizing genomic data: a case study in tidy analysis Modeling gene expression with broom: a case study in tidy analysis In previous posts, I’ve examined the benefits of the tidy data framework in cleaning, visualizing, and modeling in exploratory data analysis on a ... [Read more...]

One of the first steps of data analysis is the descriptive analysis; this helps to understand how the data is distributed and provides important information for further steps. This set of exercises will include functions useful for one variable descriptive analysis, including graphs. Before proceeding, it might be helpful to ... [Read more...]

I begin with a new project. It is from the Kaggle playground wherein the objective is to build a regression model (as the response variable or the outcome or dependent variable is continuous in nature) from a given set of predictors or independent var... [Read more...]

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We released googleVis version 0.6.1 on CRAN last week. The update fixes issues with setting certain options, following the switch from RJSONIO to jsonlite. Screen shot of some of the Google ChartsNew to googleVis? The package provides an interface betw... [Read more...]

We released googleVis version 0.6.1 on CRAN last week. The update fixes issues with setting certain options, following the switch from RJSONIO to jsonlite. Screen shot of some of the Google ChartsNew to googleVis? The package provides an interface betw... [Read more...]

As of today, there are 20 R packages that reverse depend/import/suggest (3/14/3) the pbapply package. Current and future package developers who decide to incorporate the progress bar using pbapply might want to customize the type and style of the progress bar in their packages to better suit the needs of ... [Read more...]

I begin with a new project. It is from the Kaggle playground wherein the objective is to build a regression model (as the response variable or the outcome or dependent variable is continuous in nature) from a given set of predictors or independent variables. My motivation to work on this ... [Read more...]