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The R system additional topics in .NET Maker PDF417 in .NET The R system additional topics

The R system additional topics using .net vs 2010 toadd pdf417 2d barcode in asp.net web,windows application USPS POSTal Numeric Encoding Technique Barcode 14.1 Graphical user Visual Studio .NET PDF 417 interfaces to R The R Commander (Rcmdr) will be the main focus, with brief reference to other GUIs.

Subsection 1.1.1 mentioned the usefulness of the R Commander for data input.

Especially for novices or infrequent users of R, a GUI can be similarly helpful for creating simple graphs, for statistical testing, for simple tabulation and summarization, and for tting standard models. The nal subsection describes how the function gui() (fgui package) can be used to create simple GUIs. Some tasks are best done from the command line, and some from a GUI, with the balance likely to change in favor of the command line as familiarity with R increases.

The two modes of use can be mixed. All the GUIs discussed here make available the commands used by R, for inspection and/or modi cation and/or for audit trail purposes. The user can examine the help page for the relevant function(s), modify the code as required, and re-execute it.

In addition to the R Commander, note: r JGR (Java Graphics for R) and the Deducer GUI that is designed to work with JGR. r The rattle GUI gives access to a range of multivariate graphics, regression and classi cation routines. r A more limited alternative to the R Commander is pmg (Poor Man s GUI).

r The function (latticist()) (latticist package) should be invoked with a data frame or table as argument. It then opens a GUI to the lattice and vcd packages, allowing rapid creation of plots that may be useful in their own right, or may be a rst step in creating more carefully honed plots. r The playwith package has extensive features for interacting with graphs, including the addition of annotation.

It includes an interface to latticist. The playwith package is described further in Subsection 15.5.

4. For rattle, both the Gtk + system and Glade must be installed. Further brief details are in Subsection 14.

1.2. The playwith package requires Gtk +.

. Installing the R Commander To install the R Com PDF 417 for .NET mander from the command line, enter:. install.packages("Rc mdr", dependencies=TRUE). The R system additional topics Among the many depen dencies are the graphics packages rgl (3D dynamic graphics), vcd (visualization of categorical data), and colorspace (for generation of color palettes, etc).. 14.1.1 The R Commander s interface a guide to getting started To start the R Comma nder, start up R and enter:1. library(Rcmdr). This opens an R Comm ander script window, with the output window underneath. This window can be closed by clicking on the in the top left corner. If thus closed, enter Commander() to reopen it again later in the session.

From GUI to writing code. The R Commander displays the code that it generates. Users can take this code, modify it, and rerun it.

The code can be run either from the R Commander script window or from the R console window (if open). The active data set. There is at any time a single active data set.

Start by clicking on the Data drop-down menu. Here are alternative ways to select or create the active data set: r Click on Active data set, and pick from among data sets, if any, in the workspace. r Click on Import data, and follow instructions, to read in data from a le.

The data set is read into the workspace, at the same time becoming the active data set. r Click on New data set . .

. , then entering data via a spreadsheet-like interface. r Click on Data in packages, then on Read data from package, then select an attached package and choose a data set from among those included with the package.

r A further possibility is to load data from an R image (.RData) le; click on Load data set . .

. . Creating graphs.

To draw graphs, click on the Graphs drop-down menu. Then r Click on Scatterplot . .

. to obtain a scatterplot. This uses scatterplot() from the car package, which is an option-rich interface to functions that are in base graphics.

r Click on X Y conditioning plot . . .

for lattice scatterplots and panels of scatterplots. r Click on 3D graph to obtain a 3D scatterplot, using the R Commander function scatter3d() that is an interface to functions in the rgl package. Statistics (& tting models).

Click on the Statistics drop-down menu to get submenus that give summary statistics and/or carry out various statistical tests. This includes (under Contingency tables) tables of counts and (under Means) One-way ANOVA. Also, click here to get access to the Fit models submenu.

. Models. Click here t PDF 417 for .NET o extract information from model objects once they have been tted.

(NB: To t a model, go to the Statistics drop-down menu, and click on Fit models).. At startup, the R Co mmander may check whether all the suggested packages, needed to use all its features, are available. If some are missing, then the R Commander offers to install them. To install such packages, there must be a live internet connection.

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