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ep approximate string matching fuzzy matching all are all values true all equal test if two objects are nearly equal allnames 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 arithmetic arithmetic operators array multi way arrays as data frame coerce to a data frame as date date conversion functions to and from character as environment coerce to an environment object as function convert object to function asis inhibit interpretation conversion of objects asplit split array matrix by its margins as posixlt date time conversion functions assign assign a value to a name assignops assignment operators attach attach set of r objects to search path attr object attributes attributes object attribute lists autoload on demand loading of packages backsolve solve an upper or lower triangular system base defunct defunct functions in package base base deprecated deprecated functions in package base base internal internal objects in package base basename manipulate file paths base package the r base package bessel bessel functions bincode bin a numeric vector bindenv binding and environment locking active bindings bitwise 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 callexternal modern interfaces to c c code capabilities report capabilities of this build of r cat concatenate and print cbind combine r objects by rows or columns character character vectors char expand expand a string with respect to a target table charmatch partial string matching chartr character translation and casefolding chkdots warn about extraneous arguments in the of its caller chol the choleski decomposition chol2inv inverse from choleski or qr decomposition class object classes col column indexes colnames row and column names colon colon operator colsums form row and column sums and means commandargs extract command line arguments comment query or set a comment attribute comparison relational operators 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 constants built in constants contributors r project contributors control control flow copyright copyrights of files used to build r crossprod matrix crossproduct cstack_info report information on c stack size and usage 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 dataframehelpers data frame auxiliary functions data matrix convert a data frame to a numeric matrix date system date and time dates date class datetimeclasses date time classes dcf read and write data in dcf format debug debug a function defunct marking objects as defunct delayedassign delay evaluation deparse expression deparsing deparseopts options for expression deparsing deprecated marking objects as deprecated det calculate the determinant of a matrix detach detach objects from the search path dev lists of open active graphics devices diag matrix diagonals diff lagged differences difftime time intervals differences dim dimensions of an object dimnames dimnames of an object 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 dynload 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 encoding read or set the declared encodings for a character vector environment environment access envvar 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 extract extract or replace parts of an object extract data frame extract or replace parts of a data frame extract factor extract or replace parts of a factor extremes maxima and minima extsoftversion report versions of third party software factor factors file access ascertain file accessibility file choose choose a file interactively file info extract file information file path construct path to file files file manipulation files2 manipulation of directories and file permissions file show display one or more text files findinterval find interval numbers or indices find package find packages force force evaluation of an argument forceandcall call a function with some arguments forced foreign foreign function interface foreign internal internal versions of the foreign function interface formals access to and manipulation of the formal arguments format encode in a common format formatc formatting using c style formats formatdl format description lists format info format information format pval format p values function function definition funprog common higher order functions in functional programming gc garbage collection gc time report time spent in garbage collection gctorture torture garbage collector get return the value of a named object getcallingdll compute dll for native interface call getdllregisteredroutines reflectance information for c fortran routines in a dll getloadeddlls get dlls loaded in current session getnativesymbolinfo obtain a description of one or more native c fortran 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 display numbers in hexadecimal hyperbolic hyperbolic functions 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 internal call an internal function internalmethods internal generic functions 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 isodatetime date time conversion functions from numeric representations isr are we using r rather than s is recursive is an object atomic or recursive iss4 test for an s4 object is single is an object of single precision type issymmetric test if a matrix or other object is symmetric hermitian is unsorted test if an object is not sorted 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 la_library lapack library lapply apply a function over a list or vector last value value of last evaluated expression la_version lapack version lazyload lazy load a database of r objects length length of an object lengths lengths of list or vector elements levels levels attributes libcurlversion report version of libcurl libpaths search paths for packages library loading attaching and listing of packages library dynam loading dlls from packages license the r license terms list lists generic and dotted pairs list2df create data frame from list list2env from a list build or add to an environment list files list the files in a directory folder load reload saved datasets locales query or set aspects of the locale log logarithms and exponentials logic logical operators logical logical vectors longvectors 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 match value matching match arg argument verification using partial matching match call argument matching match fun extract a function specified by name mathfun miscellaneous mathematical functions matmult matrix multiplication mat or vec create a matrix or a vector matrix matrices maxcol find maximum position in matrix mean arithmetic mean memcompress in memory compression and decompression memlimits query and set heap size limits memory memory available for data storage memory limits memory limits in r 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 na not available missing values 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 notyet not yet implemented functions and unused arguments nrow the number of rows columns of an array ns dblcolon double colon and triple colon operators ns hooks hooks for namespace events ns internal namespace internals ns load loading and unloading name spaces ns reflect namespace reflection support ns topenv top level environment null the null object numeric numeric vectors numericconstants numeric constants numeric_version numeric versions octmode display numbers in octal on exit function exit code ops date operators on the date class options options settings order ordering permutation outer outer product of arrays paren parentheses and braces parse parse r expressions paste concatenate strings path expand expand file paths pcre_config report configuration options for pcre pipeop forward pipe operator platform platform specific variables 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 primitive look up a primitive function print print values print dataframe 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 qraux reconstruct the q r or x matrices from a qr object quit terminate an r session quotes quotes random random number generation random user user supplied random number generation range range of values rank sample ranks rapply recursively apply a function to a list raw raw vectors rawconnection raw connections rawconversion convert to or from bit packed raw vectors rdutils utilities for processing rd files readbin transfer binary data to and from connections readchar transfer character strings to and from connections readline read a line from the terminal readlines read text lines from a connection readrds serialization interface for single objects readrenviron set environment variables from a file recall recursive calling regex regular expressions as used in r reg finalizer finalization of objects regmatches extract or replace matched substrings rep replicate elements of vectors and lists replace replace values in a vector reserved reserved words in r rev reverse elements rhome return the r home directory rle run length encoding rm remove objects from a specified environment round rounding of numbers round posixt round truncate data time objects row row indexes row names get and set row names for data frames rowsum give column sums of a matrix or data frame based on a s3method register s3 methods 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 sets set operations settimelimit set cpu and or elapsed time limits showconnections display connections shquote quote strings for use in os shells sign sign function sink send r output to a file slice index slice indexes in an array slotop extract or replace a slot socketselect wait on socket connections solve solve a system of equations sort sorting or ordering vectors source read r code from a file a connection or expressions special special functions of mathematics split divide into groups and reassemble sprintf use c style string formatting commands squote quote text srcfile references to source files and code standardgeneric formal method system dispatching s4 methods startswith does string start or end with another string startup initialization at start of an r session 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 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 sys parent functions to access the function call stack sys readlink read file symbolic links sys setenv set or unset environment variables sys setfiletime set file time sys sleep suspend execution for a time interval sys source parse and evaluate expressions from a file system invoke a system command system2 invoke a system command system f...