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Right option is (c) Scripts

Easy explanation: The LONGER programs CALLED scripts, there is too MUCH code to write all at once at the command prompt. Furthermore, for longer scripts, it is convenient to be able to only MODIFY a certain piece of the script and RUN it again in R.

The CORRECT CHOICE is (d) is.nan()

For explanation I WOULD say: is.nan() is used to test if they are NaN. We can check NAN‘s at any stage of the code. We will remove the NA’s for the operations in R. is.nan() is used to test for NaN.

The CORRECT answer is (C) R

For explanation: S was initiated in 1976⁷ as an internal statistical ANALYSIS environment—originally implemented as FORTRAN libraries.

Correct answer is (C) Integer

Easiest explanation: In R, there is an extension of the numeric or character vectors. They are not a separate TYPE of object but SIMPLY an atomic vector with DIMENSIONS.

Correct OPTION is (d) Spatial

Explanation: “Recommended” packages also INCLUDE boot, class, cluster, codetools, foreign, KernSmooth, lattice, mgcv, nlme, rpart, survival, MASS, nnet, Matrix. There are about ten thousand packages in R now.

Right option is (b) Shows default PACKAGES in R

The BEST I can explain: There are base packages (which come with R automatically), and contributed packages. The base packages are maintained by a select group of VOLUNTEERS, called R CORE. In ADDITION to the base packages, there are over ten thousand additional contributed packages written by individuals all over the world.

The correct answer is (a) R Foundation

The best explanation: The COPYRIGHT for the PRIMARY source CODE for R is HELD by the R Foundation. The S foundation could not have R primary source code. R is a free software environment for statistical computing and graphics.

Correct option is (a) R studio

To elaborate: An IDE tailored to the NEEDS of interactive data analysis and statistical programming called R studio. In R studio we can directly INTERACT with R through the inbuilt FUNCTIONS and packages. We can also DOWNLOAD new packages.

Correct answer is (C) tools

Explanation: The other packages contained in the “BASE” system include UTILS, stats, datasets, graphics, grDevices, grid, methods, parallel, COMPILER, splines, tcltk, STATS4.

Correct ANSWER is (c) User contributions and Consumer demand

To elaborate: Its functionality is based on consumer demand and user contributions. It is only for the HIGHER level. The capabilities of the R system generally REFLECT the interests of the R user COMMUNITY. However, now some of those communities have adopted R and we are seeing more code being written for those kinds of applications.

The correct option is (a) 2000

To EXPLAIN: Source code for the entire R system is ACCESSIBLE to ANYONE who wanted to tinker with it.

The CORRECT answer is (a) Bugs

To explain I would say: RStudio is very popular with a nice INTERFACE and well thought out, especially for more advanced usage. It can be a BIT buggy, so MAKE SURE you update it regularly. Available on all platforms.

The correct answer is (b) print(X)

The explanation: print(x) COMMAND is used to print. Print(x) is the basic syntax for R. We can directly print the variable without print function also. The functions in R are helpful to the user to SIMPLIFY the PROBLEM.

Right answer is (a) Packages

Best EXPLANATION: CRAN ALSO hosts many add-on packages that can be USED to EXTEND the functionality of R.

The correct CHOICE is (a) objects

Explanation: These may be variables, arrays of numbers, character STRINGS, FUNCTIONS, or more general structures BUILT from such COMPONENTS.

The correct answer is (a) source(“commands.R”)

EASY EXPLANATION: For Windows, Source is ALSO available on the FILE MENU.

Correct answer is (a) Rserve

Best explanation: The open source Rserve (BINARY R Server) software is available for Unix, Linux, and Windows platforms. However, due to limitations with the Windows version, it is not RECOMMENDED for use OUTSIDE of evaluation PURPOSES.

Correct answer is (a) SCALAR variable

The explanation is: A scalar variable was a variable which holds one VALUE at a time. It is a single COMPONENT which assumes a range of number or string VALUES. A scalar value is associated with every POINT in space.

Correct option is (b) R

Easy EXPLANATION: R is a POPULAR programming language and environment for STATISTICAL COMPUTING, graphics and also predictive analysis. Dundas BI integrates with an existing R system at the data cube level via many transforms which you can use to PERFORM data generation or data processing.

Right ANSWER is (d) NaN

The BEST explanation: NaN is used to define the “undefined” value in the R language. Undefined values also have some value in R. Missing values are DENOTED by NA or NaN for Q undefined mathematical operations. A NaN value is also NA but the converse is not TRUE.

Correct option is (a) Script EDITORS

Explanation: script editors are DESIGNED to aid the communication and code writing process. They have all SORTS of features including R syntax highlighting, AUTOMATIC code completion, DELIMITER matching, and dynamic help on the R functions.

Right OPTION is (a) C, C++

Easiest EXPLANATION: For computationally-intensive tasks, C, C++ and Fortran code can be linked and called at RUN TIME.

Right answer is (c) R

To explain I would say: R (www.r-project.org) is a commonly used FREE Statistics SOFTWARE. R ALLOWS you to carry out STATISTICAL analyses in an interactive mode, as well as allowing SIMPLE programming.

The correct choice is (b) source()

The explanation is: source is available in the file menu. Today R RUNS on almost any standard computing platform and operating system. Its open source nature. The copyright for the PRIMARY source code for R is held by the R FOUNDATION and is PUBLISHED under the GNU General Public License version.

Correct option is (a) $ R

The BEST I can explain: At this POINT R commands may be ISSUED.

Right choice is (a) :

To explain: “:” OPERATOR is used to create an integer sequence. The other OPERATORS are used for other PURPOSES. Integer sequence is the basic operator used in R. The [ operator can be used to extract multiple ELEMENTS of a vector by passing the operator an integer sequence.

The CORRECT option is (b) R RUNS only on WINDOWS computing platform and operating SYSTEM

Best explanation: R runs on almost any standard computing platform and operating system.

The CORRECT option is (a) Early versions of the S LANGUAGE contain functions for statistical modeling

For explanation: Insightful SOLD its implementation of the S language under the PRODUCT name S-PLUS.

Right CHOICE is (b) K is language for statistical MODELLING and graphics

Easy explanation: In 1996, a public mailing list was created (the R-help and R-devel lists) and in 1997 the R Core Group was formed, CONTAINING some people associated with S and S-PLUS.

The correct answer is (a) Character string

For EXPLANATION: Single ELEMENT of a character vector is often REFERRED to as a character string. Dates are represented by the Date class and can be coerced from a character string using the as.Date() function. This is a COMMON way to END up with a Date object in R.

The CORRECT choice is (a) ROW.NAMES()

EXPLANATION: row.names() is the function to set row names for a DATA frame. Data frames have a special attribute called row.names, which indicate information about each row of the data frame.

Right option is (B) 4095

For explanation: Elementary COMMANDS can be grouped together into one COMPOUND expression by BRACES (‘{’ and ‘}’).

Right option is (d) Statistics, Probability, DISTRIBUTIONS

For explanation I WOULD say: R has many functions for all types of mathematical objects. For EXAMPLE, Statistics, Probability, Distributions like Multivariate, Continuous, Simple, Discrete etc.

The correct OPTION is (c) install.packages (“for”, depends = TRUE)

EASIEST EXPLANATION: To install a package named for, open up R and type install.packages(“for”). To install foo and additionally install all of the other packages on which for depends, INSTEAD type install.packages (“for”, depends = TRUE).

The correct CHOICE is (c) 2004

The explanation: TIBCO is the current OWNER of the S language. In 2008, Insightful was acquired by TIBCO for $25 million. As of this WRITING, TIBCO is the current owner of the S language and is its exclusive DEVELOPER.