.Call Modern Interfaces to C/C++ code .Device Lists of Open/Active Graphics Devices .Internal Call an Internal Function .Last.value Value of Last Evaluated Expression .Library Search Paths for Packages .Machine Numerical Characteristics of the Machine .Platform Platform Specific Variables .Primitive Look Up a Primitive Function .S3method Register S3 Methods .bincode Bin a Numeric Vector .deparseOpts Options for Expression Deparsing .onLoad Hooks for Namespace Events .packages Listing of Packages .standard_regexps Miscellaneous Internal/Programming Utilities : Colon Operator :: Double Colon and Triple Colon Operators @ Extract or Replace a Slot or Property Arithmetic Arithmetic Operators AsIs Inhibit Interpretation/Conversion of Objects Bessel Bessel Functions Comparison Relational Operators Constants Built-in Constants Control Control Flow Cstack_info Report Information on C Stack Size and Usage DateTimeClasses Date-Time Classes Dates Date Class Defunct Marking Objects as Defunct Deprecated Marking Objects as Deprecated Encoding Read or Set the Declared Encodings for a Character Vector Extract Extract or Replace Parts of an Object Filter Common Higher-Order Functions in Functional Programming Languages Foreign Foreign Function Interface ISOdatetime Date-time Conversion Functions from Numeric Representations InternalMethods Internal Generic Functions La_library LAPACK Library La_version LAPACK Version Logic Logical Operators Memory Memory Available for Data Storage Memory-limits Memory Limits in R NA 'Not Available' / Missing Values NULL The Null Object NotYetImplemented Not Yet Implemented Functions and Unused Arguments NumericConstants Numeric Constants Ops.Date Operators on the Date Class Paren Parentheses and Braces Quotes Quotes R.Version Version Information R.home Return the R Home Directory Random Random Number Generation Random.user User-supplied Random Number Generation Rdconv Utilities for Processing Rd Files Recall Recursive Calling Reserved Reserved Words in R Special Special Functions of Mathematics StackOverflows Stack Overflow Errors Startup Initialization at Start of an R Session Syntax Operator Syntax and Precedence Sys.getenv Get Environment Variables Sys.getpid Get the Process ID of the R Session Sys.glob Wildcard Expansion on File Paths Sys.info Extract System and User Information Sys.localeconv Find Details of the Numerical and Monetary Representations in the Current Locale Sys.readlink Read File Symbolic Links Sys.setFileTime Set File Time Sys.setenv Set or Unset Environment Variables Sys.sleep Suspend Execution for a Time Interval Sys.time Get Current Date and Time Sys.which Find Full Paths to Executables Tailcall 'Tailcall' and 'Exec' Trig Trigonometric Functions UseMethod Class Methods Vectorize Vectorize a Scalar Function [.data.frame Extract or Replace Parts of a Data Frame [.factor Extract or Replace Parts of a Factor abbreviate Abbreviate Strings abs Miscellaneous Mathematical Functions addTaskCallback Add or Remove a Top-Level Task Callback agrep Approximate String Matching (Fuzzy Matching) all Are All Values True? all.equal Test if Two Objects are (Nearly) Equal all.names Find All Names in an Expression any Are Some Values True? aperm Array Transposition append Vector Merging apply Apply Functions Over Array Margins args Argument List of a Function array Multi-way Arrays array2DF Convert array to data frame as.Date Date Conversion Functions to and from Character as.POSIXct Date-time Conversion Functions as.data.frame Coerce to a Data Frame as.environment Coerce to an Environment Object as.function Convert Object to Function asplit Split Array/Matrix By Its Margins assign Assign a Value to a Name assignOps Assignment Operators attach Attach Set of R Objects to Search Path attachNamespace Loading and Unloading Name Spaces attr Object Attributes attributes Object Attribute Lists autoload On-demand Loading of Packages backsolve Solve an Upper or Lower Triangular System balancePOSIXlt Balancing "Ragged" and Out-of-range POSIXlt Date-Times base-package The R Base Package basename Manipulate File Paths bindenv Binding and Environment Locking, Active Bindings bitwNot Bitwise Logical Operations body Access to and Manipulation of the Body of a Function bquote Partial substitution in expressions browser Environment Browser browserText Functions to Retrieve Values Supplied by Calls to the Browser builtins Returns the Names of All Built-in Objects by Apply a Function to a Data Frame Split by Factors c Combine Values into a Vector or List call Function Calls callCC Call With Current Continuation capabilities Report Capabilities of this Build of R cat Concatenate and Print cbind Combine R Objects by Rows or Columns ceiling Rounding of Numbers char.expand Expand a String with Respect to a Target Table charToRaw Convert to or from (Bit/Packed) Raw Vectors character Character Vectors charmatch Partial String Matching chartr Character Translation and Case Folding chkDots Warn About Extraneous Arguments in the "..." of Its Caller chol The Cholesky Decomposition chol2inv Inverse from Cholesky (or QR) Decomposition chooseOpsMethod Choose the Appropriate Method for Ops class Object Classes col Column Indexes colSums Form Row and Column Sums and Means commandArgs Extract Command Line Arguments comment Query or Set a '"comment"' Attribute complex Complex Numbers and Basic Functionality conditions Condition Handling and Recovery conflicts Search for Masked Objects on the Search Path connections Functions to Manipulate Connections (Files, URLs, ...) contributors R Project Contributors copyright Copyrights of Files Used to Build R cosh Hyperbolic Functions crossprod Matrix Cross-Product cumsum Cumulative Sums, Products, and Extremes curlGetHeaders Retrieve Headers from URLs cut Convert Numeric to Factor cut.POSIXt Convert a Date or Date-Time Object to a Factor data.class Object Classes data.frame Data Frames data.matrix Convert a Data Frame to a Numeric Matrix date System Date and Time debug Debug a Function declare Declarations delayedAssign Delay Evaluation and Promises deparse Expression Deparsing det Calculate the Determinant of a Matrix detach Detach Objects from the Search Path diag Matrix Diagonals diff Lagged Differences difftime Time Intervals / Differences dim Dimensions of an Object dimnames Dimnames of an Object dir.create Manipulation of Directories and File Permissions do.call Execute a Function Call dontCheck Identity Function to Suppress Checking dots ..., '..1', etc used in Functions double Double-Precision Vectors dput Write an Object to a File or Recreate it drop Drop Redundant Extent Information droplevels Drop Unused Levels from Factors dump Text Representations of R Objects duplicated Determine Duplicate Elements dyn.load Foreign Function Interface eapply Apply a Function Over Values in an Environment eigen Spectral Decomposition of a Matrix encodeString Encode Character Vector as for Printing environment Environment Access environment variables Environment Variables eval Evaluate an (Unevaluated) Expression exists Is an Object Defined? expand.grid Create a Data Frame from All Combinations of Factor Variables expression Unevaluated Expressions extSoftVersion Report Versions of Third-Party Software factor Factors file path encoding File Paths not in the Native Encoding file.access Ascertain File Accessibility file.choose Choose a File Interactively file.info Extract File Information file.path Construct Path to File file.show Display One or More Text Files files File Manipulation find.package Find Packages findInterval Find Interval Numbers or Indices force Force Evaluation of an Argument forceAndCall Call a function with Some Arguments Forced formals Access to and Manipulation of the Formal Arguments format Encode in a Common Format format.info format(.) Information format.pval Format P Values formatC Formatting Using C-style Formats formatDL Format Description Lists function Function Definition gc Garbage Collection gc.time Report Time Spent in Garbage Collection gctorture Torture Garbage Collector get Return the Value of a Named Object getDLLRegisteredRoutines Reflectance Information for C/Fortran routines in a DLL getHook Functions to Get and Set Hooks for Load, Attach, Detach and Unload getLoadedDLLs Get DLLs Loaded in Current Session getNativeSymbolInfo Obtain a Description of one or more Native (C/Fortran) Symbols getTaskCallbackNames Query the Names of the Current Internal Top-Level Task Callbacks gettext Translate Text Messages getwd Get or Set Working Directory gl Generate Factor Levels grep Pattern Matching and Replacement grepRaw Pattern Matching for Raw Vectors groupGeneric S3 Group Generic Functions grouping Grouping Permutation gzcon (De)compress I/O Through Connections hexmode Integer Numbers Displayed in Hexadecimal iconv Convert Character Vector between Encodings icuSetCollate Setup Collation by ICU identical Test Objects for Exact Equality identity Identity Function ifelse Conditional Element Selection integer Integer Vectors interaction Compute Factor Interactions interactive Is R Running Interactively? invisible Change the Print Mode to Invisible is.finite Finite, Infinite and NaN Numbers is.function Is an Object of Type (Primitive) Function? is.language Is an Object a Language Object? is.object Is an Object 'internally classed'? is.recursive Is an Object Atomic or Recursive? is.single Is an Object of Single Precision Type? is.unsorted Test if an Object is Not Sorted isS4 Test for an S4 object isSymmetric Test if a Matrix or other Object is Symmetric (Hermitian) jitter 'Jitter' (Add Noise) to Numbers kappa Compute or Estimate the Condition Number of a Matrix kronecker Kronecker Products on Arrays l10n_info Localization Information labels Find Labels from Object lapply Apply a Function over a List or Vector length Length of an Object lengths Lengths of List or Vector Elements levels Levels Attributes libcurlVersion Report Version of libcurl library Loading/Attaching and Listing of Packages library.dynam Loading DLLs from Packages license The R License Terms list Lists - Generic and Dotted Pairs list.files List the Files in a Directory/Folder list2DF Create Data Frame From List list2env From A List, Build or Add To an Environment load Reload Saved Datasets locales Query or Set Aspects of the Locale log Logarithms and Exponentials logical Logical Vectors long vector Long Vectors lower.tri Lower and Upper Triangular Part of a Matrix ls List Objects make.names Make Syntactically Valid Names make.unique Make Character Strings Unique mapply Apply a Function to Multiple List or Vector Arguments marginSums Compute Table Margins mat.or.vec Create a Matrix or a Vector match Value Matching match.arg Argument Verification Using Partial Matching match.call Argument Matching match.fun Extract a Function Specified by Name matmult Matrix Multiplication matrix Matrices max Maxima and Minima max.col Find Maximum Position in Matrix mean Arithmetic Mean mem.maxVSize Query and Set Heap Size Limits memCompress In-memory Compression and Decompression memory.profile Profile the Usage of Cons Cells merge Merge Two Data Frames message Diagnostic Messages missing Does a Formal Argument have a Value? mode The (Storage) Mode of an Object mtfrm Auxiliary Function for Matching name Names and Symbols names The Names of an Object nargs The Number of Arguments to a Function nchar Count the Number of Characters (or Bytes or Width) nlevels The Number of Levels of a Factor noquote Class for 'no quote' Printing of Character Strings norm Compute the Norm of a Matrix normalizePath Express File Paths in Canonical Form nrow The Number of Rows/Columns of an Array numeric Numeric Vectors numeric_version Numeric Versions octmode Integer Numbers Displayed in Octal on.exit Function Exit Code options Options Settings order Ordering Permutation outer Outer Product of Arrays parse Parse R Expressions paste Concatenate Strings path.expand Expand File Paths pcre_config Report Configuration Options for PCRE pipeOp Forward Pipe Operator plot Generic X-Y Plotting pmatch Partial String Matching polyroot Find Zeros of a Real or Complex Polynomial pos.to.env Convert Positions in the Search Path to Environments pretty Pretty Breakpoints print Print Values print.data.frame Printing Data Frames print.default Default Printing prmatrix Print Matrices, Old-style proc.time Running Time of R prod Product of Vector Elements proportions Express Table Entries as Fraction of Marginal Table pushBack Push Text Back on to a Connection qr The QR Decomposition of a Matrix qr.X Reconstruct the Q, R, or X Matrices from a QR Object quit Terminate an R Session range Range of Values rank Sample Ranks rapply Recursively Apply a Function to a List raw Raw Vectors rawConnection Raw Connections read.dcf Read and Write Data in DCF Format readBin Transfer Binary Data To and From Connections readChar Transfer Character Strings To and From Connections readLines Read Text Lines from a Connection readRDS Serialization Interface for Single Objects readRenviron Set Environment Variables from a File readline Read a Line from the Terminal reg.finalizer Finalization of Objects regex Regular Expressions as used in R regmatches Extract or Replace Matched Substrings remove Remove Objects from a Specified Environment rep Replicate Elements of Vectors and Lists replace Replace Values in a Vector rev Reverse Elements rle Run Length Encoding round.POSIXt Round / Truncate Date-Time Objects row Row Indexes row.names Get and Set Row Names for Data Frames rownames Row and Column Names rowsum Give Column Sums of a Matrix or Data Frame, Based on a Grouping Variable sQuote Quote Text sample Random Samples and Permutations save Save R Objects scale Scaling and Centering of Matrix-like Objects scan Read Data Values search Give Search Path for R Objects seek Functions to Reposition Connections seq Sequence Generation seq.Date Generate Regular Sequences of Dates seq.POSIXt Generate Regular Sequences of Times sequence Create A Vector of Sequences serialize Simple Serialization Interface setTimeLimit Set CPU and/or Elapsed Time Limits shQuote Quote Strings for Use in OS Shells shell Invoke a System Command, using a Shell shell.exec Open a File or URL using Windows File Associations showConnections Display Connections sign Sign Function sink Send R Output to a File slice.index Slice Indexes in an Array socketSelect Wait on Socket Connections solve Solve a System of Equations sort Sorting or Ordering Vectors sort_by Sorting Vectors or Data Frames by Other Vectors source Read R Code from a File, a Connection or Expressions split Divide into Groups and Reassemble sprintf Use C-style String Formatting Commands srcfile References to Source Files and Code standardGeneric Formal Method System - Dispatching S4 Methods startsWith Does String Start or End With Another String? stop Stop Function Execution stopifnot Ensure the Truth of R Expressions strptime Date-time Conversion Functions to and from Character strrep Repeat the Elements of a Character Vector strsplit Split the Elements of a Character Vector strtoi Convert Strings to Integers strtrim Trim Character Strings to Specified Display Widths structure Attribute Specification strwrap Wrap Character Strings to Format Paragraphs subset Subsetting Vectors, Matrices and Data Frames substitute Substituting and Quoting Expressions substr Substrings of a Character Vector sum Sum of Vector Elements summary Object Summaries svd Singular Value Decomposition of a Matrix sweep Sweep out Array Summaries switch Select One of a List of Alternatives sys.parent Functions to Access the Function Call Stack sys.source Parse and Evaluate Expressions from a File system Invoke a System Command system.file Find Names of R System Files system.time CPU Time Used system2 Invoke a System Command t Matrix Transpose table Cross Tabulation and Table Creation tabulate Tabulation for Vectors tapply Apply a Function Over a Ragged Array taskCallbackManager Create an R-level Task Callback Manager tempfile Create Names for Temporary Files textConnection Text Connections tilde Tilde Operator timezones Time Zones toString Convert an R Object to a Character String topenv Top Level Environment trace Interactive Tracing and Debugging of Calls to a Function or Method traceback Get and Print Call Stacks tracemem Trace Copying of Objects transform Transform an Object, for Example a Data Frame trimws Remove Leading/Trailing Whitespace try Try an Expression Allowing Error Recovery typeof The Type of an Object union Set Operations unique Extract Unique Elements units Units unlink Delete Files and Directories unlist Flatten Lists unname Remove 'names' or 'dimnames' use Use Packages utf8ToInt Convert Integer Vectors to or from UTF-8-encoded Character Vectors validUTF8 Check if a Character Vector is Validly Encoded vector Vectors - Creation, Coercion, etc warning Warning Messages warnings Print Warning Messages weekdays Extract Parts of a POSIXt or Date Object which Which indices are TRUE? which.min Where is the Min() or Max() or first TRUE or FALSE ? with Evaluate an Expression in a Data Environment withVisible Return both a Value and its Visibility write Write Data to a File writeLines Write Lines to a Connection xtfrm Auxiliary Function for Sorting and Ranking zapsmall Rounding of Numbers: Zapping Small Ones to Zero