Introduction to R programming

The following statement are true about R, except...

• an integrated suite of software facilities for data manipulation, calculation and graphical display

• a suite of operators for calculations on arrays, in particular matrices

• graphical facilities for data analysis and display only directly at the computer but not on hardcopy

• runs on all platforms

The term “environment” is intended to characterize it as a fully planned and coherent system with an incremental accretion of very specific and inflexible tools, as is frequently the case with other data analysis software.

• TRUE

• FALSE

There is an important difference in philosophy between S (and hence R) and the other main statistical systems. In SAS and SPSS a statistical analysis is normally done as a series of steps, with intermediate results being stored in objects. Thus whereas S will give copious output from a regression or discriminant analysis, R will give minimal output and store the results in a fit object for subsequent interrogation by further R function

• TRUE

• FALSE

R the application is installed on your computer and uses your personal computer resources to process R programming language. RStudio integrates with R as an IDE (Integrated Developmet Environment) to provide further functionality. RStudio combines a source code editor, build automation tools and a debugger.

• TRUE

• FALSE

CRAN is abbreviations from...and what does CRAN mean?

• Coherent R Active Network; the fundamental unit of shareable code

• Cohorent R Archive Network; the public clearing house for R packages

• Comprehensive R Archive Network; the public clearing house for R packages

• Comprehensive R Active Network; the fundamental unit of shareable code

which one is true about R packages ? (the answer can be more than one)

• the fundamental unit of shareable code

• a collection of R functions, complied code and sample data

• They are stored under a directory called "library" in the R environment.

• By default, R installs a set of packages during installation. More packages are added later, when they are needed for some specific purpose.

which part that shows the list of R objects you created during your R session?

• 1

• 2

• 3

• 4

choose the following statement that is false about Bioconductor! (answer can be more than one)

• Most Bioconductor components are not distributed as R packages

• open source

• provide tools for the analysis and comprehension of high-throughput genomic data.

• Bioconductor release version is updated once each year

The broad goals of the Bioconductor project are....(the answer can be more than one)

• To provide widespread access to a broad range of powerful statistical and graphical methods for the analysis of genomic data.

• To further scientific understanding by producing high-quality documentation and reproducible research.

• To train researchers on computational and statistical methods for the analysis of genomic data.

• To facilitate the inclusion of biological metadata in the analysis of genomic data, e.g. literature data from PubMed, annotation data from Entrez genes.

When you use the R program it issues a prompt when it expects input commands. The default prompt is....

• $

• <

• >

• @