When working with table data from the scientific or patent literature, it is extremely common to find that columns contain concatenated data. That is, they contain multiple entries with a semicolon as a separator. Data of this type is not tidy (Wickham 2014). What we commonly want to do is to ... [Read more...]

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Every inch of sky’s got a star Every inch of skin’s got a scar (Everything Now, Arcade Fire) I think that a very good way to start with R is doing an interactive visualization of some open data because you will train many important skills of a data ... [Read more...]

The version that was only available through GitHub is now also on CRAN. This new version corrects some minor bugs in the code. Available here. [Read more...]

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Find previous posts if you haven’t yet read them. first post, second post, third post, and fourth post. Numerical approach for number made of 1 unique digit First important result All the numbers from 1 to 9, provides 1 as final output of Collatz ... [Read more...]

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Many types of machine learning classifiers, not least commonly-used techniques like ensemble models and neural networks, are notoriously difficult to interpret. If the model produces a surprising label for any given case, it's difficult to answer the question, "why that label, and not one of the others?". One approach to ... [Read more...]

R Tip: be wary of “...“. The following code example contains an easy error in using the R function unique(). vec1 [Read more...]

Remember to reference R When people are new to using R and, perhaps, to referencing and report writing in general, they often don’t know they should cite and reference R and its packages. We do this for the same reasons we reference any thing else in any academic work. ... [Read more...]

Throughout the last years I noticed the following happening with a number of people. One of those people was actually yours truely a few years back. Person is aware of S3 methods in R through regular use of print, plot and summary functions and decides to give it a go ... [Read more...]

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INTRODUCTION With flexdashboard, you can easily create interactive dashboards for R. What is amazing about it is that with R Markdown, you can publish a group of related data visualizations as a dashboard. Additionally, it supports a wide variety of components, including htmlwidgets; base, lattice, and grid graphics; tabular data; ... [Read more...]