We’ve blogged previously about various improvements we’ve made to the source editor in RStudio v0.99 including enhanced code completion, snippets, diagnostics, and an improved Vim mode. Besides these larger scale features we’ve made lots of smaller improvements that we also wanted to highlight. You can try out all of these features now in the RStudio v0.99 preview release.

Multiple Cursors

You can now create and use multiple cursors within RStudio. Multiple cursors can be created in a variety of ways:

RStudio also makes use of multiple cursors in its Find / Replace toolbar now. After entering a search term, if you press the All button, all items matching that search term are selected.

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You can then begin typing to replace each match with a new term—each matched entry will be updated as you type.

Rearrangeable Tabs

You can (finally!) move tabs around in the Source pane by clicking and dragging. In the below example, the file ‘file_4.R’ is currently selected and being dragged into place.


New, Improved Editor Themes

A number of new editor themes have been added to RStudio, and older editor themes have been tweaked to ensure that brackets are given a distinct color from text for further legibility.


Select / Expand Selection

You can use Ctrl + Shift + E to select everything within the nearest pair of opening and closing brackets, or use Ctrl + Alt + Shift + E to expand the selection up to the next closing bracket.

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Fuzzy Navigation

You can use CTRL + . to quickly navigate between files and symbols within a project. Previously, this search utility performed prefix matching, and so it was difficult to use with long file / symbol names. Now, the CTRL + . navigator uses fuzzy matching to narrow the candidate set down based on subsequence matching, which makes it easier to navigate when many files share a common prefix—for example, to test- files for a project managing its tests with testthat.

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Insert Roxygen Skeleton

RStudio now provides a means for inserting a Roxygen documentation skeleton above functions. The skeleton generator is smart enough to understand plain R functions, as well as S4 generics, methods and classes—it will automatically fill in documentation for available parameters and slots.


More Languages

We’ve also added syntax highlighting modes for many new languages including Clojure, CoffeeScript, C#, Graphviz, Go, Groovy, Haskell, Java, Julia, Lisp, Lua, Matlab, Perl, Ruby, Rust, Scala, and Stan. There’s also some basic keyword and text based code completion for several languages including JavaScript, HTML, CSS, Python, and SQL.

Try it Out

You can try out all of the new editor features by downloading the latest preview release of RStudio. As always, let us know how the new features are working as well as what else you’d like to see us do.