Knitting tables with kable

The kable function from the knitr package allows to display nicely formatted tables using R Markdown, as explained here. I recently encountered unexpected behaviour of kable when calling it from lapply or a function, which led to this post on StackOverflow. The answers were very detailed and enlightening, and I invite you to read them. They could be summarized in two points: be aware of side-effects, and prefer cat (with new lines) to print.

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Merging in R

A common task I happen to do in R is merging tables (for instance, using gene symbol as a join) and renaming columns with a suffix to indicate their table of origin. Below is a function that automatizes most of the process, taking any number of dataframes as input. It is also posted on GitHub.