RKWard/fr

Présentation

RKWard est un environnement de développent intégré (EDI ou IDE pour integrated development environment) construit sur la plateforme de développement KDE pour le langage de programmation R , un langage de script très orienté vers les statistiques et la manipulation de données.

Fonctionnalités

• Environnement de développement avec coloration syntaxique, complétion de code, navigateur d'objets, navigateur d'aide

• Interface transparente vers R

• Outils graphiques pour accéder aux fonctions statistiques et de visualisation de R.
• Éditeur de données intégré

• Console R interactive intégrée

• Gestion des paquets R

• Chargement/Enregistrement des états de l'espace de travail de R

• Extensible via les modules externes ECMAscript

Utilisation de RKWard comme EDI pour R

R est un langage interprété, et RKWard' permet d'utiliser le langage R de manière interactive, de façon similaire à une console R 'normale', mais avec des fonctionnalités supplémentaires comme la coloration syntaxique et la possibilité de coller des données issues de tableurs. De plus, RKWard offre des fonctionnalités typiques des EDI : Un éditeur de script intégré, un navigateur de fichiers, un visualiseur d'objets, etc.

Interactive interpreter

RKward offers an integrated R prompt which can be used to work with the R engine, interactively.

The interactive prompt

The prompt is by all intents and purposes identical to the R console prompt, with some additional capabilities. For example, along with function name completion, it supports calltips (pop-up boxes which show a function's signature) and also various way of copying and pasting the code.

This way operates like a normal R session: commands are inputted, output and other objects are created, and results can be shown or saved to disk using R's own functions.

Programming in RKward

The code editor

Programming in RKWard is done like in any other IDE: the code editor offers completion, syntax highlighting, and calltips. The code editor however offers additional functions that can be used in an interactive session. Specific commands can be issued to execute all the currently loaded code, or only the selected code: this is particularly useful when writing functions to be then prototyped in an interactive session.

Taking a look at R objects

An R session typically involves many data (and function) objects. Literally thousands more may be loaded from "libraries" (add-on packages). RKward offers an interface to browse and inspect the objects loaded in the R workspace.

The object browser

The object browser allows access to both R's global environment (where, typically, user data is kept) and the environments of add-on packages. Additional information are available either as tooltips or by double-clicking items, which will open a new tab in RKWard's interface showing information on the object in question.

Data manipulation

Along with code aids, RKward provides support for handling data, conveniently. In particular, one can view and edit matrices and data frames (R's own definition of data tables) in the interface, or create new ones.

Existing data can be imported: R supports loading text files (TSV/CSV) and also data from widely used statistics programs such as STATA or SPSS. RKWard provides easy to use dialogs for this data import functionality.

The TSV import dialog

The interface can show the column names, the types of the columns (numbers, strings, etc.) and the data itself, using a spreadsheet-like user interface.

The data browser

There is direct support for editing and data manipulaiton: for example, adding rows or columns, changing row headers, and also the data type of the columns themselves, acting like a simplified spreadsheet.

Interactive statistics and plotting

RKWard offers simplified front-ends to a number of R's statistical functions and to generate graphs for data. These can be accessed from the Analysis, Plots and Distributions menus.

One of the many analysis aids

For example, many type of plots can be executed through the functions in the aforementioned menus. Each function (as the example above shows) has its dedicated configuration dialog, where any compatible object from R's global namespace can be used. Also the dialogs offer shortcuts to specific plot or analysis options. Results are then output in HTML form in RKWard's main window, where they can be exported or saved.

Combining statistical analysis and programming

For each action carried out using graphical dialogs, RKWard shows the corresponding R code, transparently. This allows users to copy and paste code to their own scripts, easily, to automate complex tasks. "Run again" links in RKWard's output window allow to repeat an analysis (with or without modified settings), in just a few clicks.

More information

The RKWard homepage has more information, in particular on extending RKWard with custom plugins, and also more screenshots.