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Text of the page (random words):
class srcref summary object usesource false s3 method for class srcref as character x usesource true to x isopen srcfile arguments filename the name of a file encoding the character encoding to assume for the file enc the encoding with which to make strings see the encoding argument of parse lines a character vector of source lines other r objects will be coerced to character timestamp the timestamp to use on a copy of a file isfile is this srcfilecopy known to come from a file system file srcfile a srcfile object first last line line numbers lloc a vector of four six or eight values giving a source location see details x object con an object of the appropriate class usesource whether to read the srcfile to obtain the text of a srcref to an optional second srcref object to mark the end of the character range additional arguments to the methods these will be ignored details these functions and classes handle source code references the srcfile function produces an object of class srcfile which contains the name and directory of a source code file along with its timestamp for use in source level debugging not yet implemented and source echoing the encoding of the file is saved see file for a discussion of encodings and iconvlist for a list of allowable encodings on your platform the srcfilecopy function produces an object of the descendant class srcfilecopy which saves the source lines in a character vector it copies the value of the isfile argument to help debuggers identify whether this text comes from a real file in the file system the srcfilealias function produces an object of the descendant class srcfilealias which gives an alternate name to another srcfile this is produced by the parser when a line directive is used the getsrclines function reads the specified lines from srcfile the srcref function produces an object of class srcref which describes a range of characters in a srcfile the lloc value gives the following values c first_line first_byte last_line last_byte first_column last_column first_parsed last_parsed bytes elements 2 4 and columns elements 5 6 may be different due to multibyte characters if only four values are given the columns and bytes are assumed to match lines elements 1 3 and parsed lines elements 7 8 may differ if a line directive is used in code the former will respect the directive the latter will just count lines if only 4 or 6 elements are given the parsed lines will be assumed to match the lines methods are defined for print summary open and close for classes srcfile and srcfilecopy the open method opens its internal file connection at a particular line if it was already open it will be repositioned to that line methods are defined for print summary and as character for class srcref the as character method will read the associated source file to obtain the text corresponding to the reference if the to argument is given it should be a second srcref that follows the first in the same file they will be treated as one reference to the whole range the exact behaviour depends on the class of the source file if the source file inherits from class srcfilecopy the lines are taken from the saved copy using the parsed line counts if not an attempt is made to read the file and the original line numbers of the srcref record i e elements 1 and 3 are used if an error occurs e g the file no longer exists text like srcref file chars 1 1 to 2 10 will be returned instead indicating the line column ranges of the first and last character the summary method defaults to this type of display lists of srcref objects may be attached to expressions as the srcref attribute the list of srcref objects should be the same length as the expression by default expressions are printed by print default using the associated srcref to see deparsed code instead call print with argument usesource false if a srcref object is printed with usesource false the srcref record will be printed isopen is intended for internal use it checks whether the connection associated with a srcfile object is open value srcfile returns a srcfile object srcfilecopy returns a srcfilecopy object getsrclines returns a character vector of source code lines srcref returns a srcref object author s duncan murdoch see also getsrcfilename for extracting information from a source reference or removesource to remove it from a non primitive function aka closure examples has timestamp src srcfile system file description package base summary src getsrclines src 1 4 ref srcref src c 1 1 2 1000 ref print ref usesource false base abbreviate abbreviate strings agrep 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 ...