Concatenate two or more Strings in R. While concatenating strings in R, we can choose the separator and number number of input strings. Code chunks within R Sweave or R Markdown documents 1. Content tagged with expand rows. Reshaping Your Data with tidyr. Add Column. #' Expand the Rows of a Dataset #' #' Expands (replicates) the rows of a `data.frame` or `data.table`, either by a #' fixed number, a specified vector, or a value contained in one of the columns #' in the source `data.frame` or `data.table`. Expand Data Frame. , expand rows. Source: R/separate-rows.R separate_rows.Rd If a variable contains observations with multiple delimited values, this separates the values and places each one in its own row. You can expand the folded region by either clicking on the arrow in the gutter or on the icon that overlays the folded code. Re: how to expand selected row on button click or rowselect event in an af:listview. Following examples demonstrate different scenarios while concatenating strings in R using paste() function. A simple way to repeat, replicate, or explode data.table rows in R Farhan R January 31, 2014 February 4, 2015 3 Minutes Note: I found this technique on an old forum post somewhere a while back. Example: Concatenate Strings in R. In this example, we will use paste() function with default separator. Although many fundamental data processing functions exist in R, they have been a bit convoluted to date and have lacked consistent coding and the ability to easily flow together. Keyboard Shortcuts This information is available directly in the RStudio IDE under the Tools menu: Tools → Keyboard Shortcuts Help. #' #' #' @param dataset The input `data.frame` or `data.table`. The following types of code regions are automatically foldable within RStudio: Braced regions (function definitions, conditional blocks, etc.) Foldable Regions. A data frame can be expanded by adding columns and rows.