iteror functions by taskis.iteror – Check whether a function has class ‘iteror’.iteror – Generic function to convert a given object into an iteror.nextOr – Obtain the next element from an iteror.r_to_py.iteror – Make an iteror act as a Python iterator (requires package reticulate)Most of these functions are S3 generic.
as.character, as.numeric, as.logical, as.list – Collect all an iteror’s values into a vector.as.vector – Collect values into a specified type of vector.concat – Paste an iteror’s values end-to-end in one vector.consume – Take all or some of an iteror’s elements and discard them.count – Compute all elements, discard them and return their count.dotproduct – Sum of products of corresponding elements of two iterors.nth – Compute and discard the first \(n-1\) elements and return the \(n\)th.prod.iteror – Product of all an iteror’s values (i.e. reduce using *.)quantify – Consume an iteror and return how many elements were TRUE.record – Write an iteror’s elements to a file.reduce – Combine all of iteror’s values using a binary function, returning the final value.sum.iteror – Sum all values of an iteror (i.e. reduce using +.)take – Take some number of elements and return them in a vector.By convention, functions in this package that construct an iterator in terms of basic data or other objects have names beginning with “i”.
ienum, ienumerate – return the elements of an iterable alongside it index.i_repeat – Return one value over and over again.iteror.array – Iterate over an array along given dimensions.iteror.data.frame – Iterate over rows or columns of a data frame.iteror.default – Iterate over a vector from first to last index.icombinations – Enumerate all combinations of \(m\) elements of a given vector, with or without replacement.icount – Produce an integer sequence starting with 1.icountn – Enumerate multiple indices, in either row-major or col-major order.idiv – Return a sequence of \(n\) integers that add up to a given total.igrid – Produce a sequence over the Cartesian product of the given vectors.ipermutations – A sequence containing all permutations of a given vector.iseq – Generate arithmetic sequences with specific step size and origin.iseq_along – Counting sequence parallel to a given vector.Random number iterators can be made reproducible by specifying independent=TRUE and specifying a seed value, though this has a performance cost.
iRNGStream, iRNGSubStream – Create a sequence of seed values so as to make parallel, decorrelated random streams.irnbinom, irnorm, irpois, irunif, isample, irbinom – Draw samples from the given distribution.iread.table – Reads row-wise from delimited text files.ireadBin – Read binary data from file connections.ireadLines – Read lines from text connections.ireaddf – Read rows from several files in parallel (one per column).ireplay – reads back values from a data file created with recorditabulate – Evaluate a function over an arithmetic sequence.record – Write values from an iterator to a file.iteror.function – Create an iteror with custom behavior.By convention, in this package, functions that transform iterators – creating a new iterator based on one or more underlying iterables – begin with “i_”, with an underscore.
i_chunk – Collect \(n\) adjacent values from an iterable and return a list.i_pad – After a given iterator ends, return a padding value indefinitely.i_recycle – Record the values emitted by the underlying iterator and replay them.i_rep – Repeat each element of an iterable a given number of times.i_slice – Return elements based on a starting point ans stride.i_window – Return adjacent elements from the underlying iteror in a sliding window.i_accum – Apply a 2-argument function between an iteror’s elements, and return a sequence of partial totals.i_apply – Apply a given function to each element.i_enumerate – Return an index along with each element.i_star, i_starmap, i_map – Apply a multiple-argument function to multiple parallel iterators.i_break – Return elements only while the given (no-argument) function evaluates to TRUE.i_dedup – Discard elements that are identical the immediately preceding element.i_drop – Discard elements for which a criterion function returns TRUE.i_dropwhile – Discard elements from an iterator until the criterion function evaluates FALSE.i_keep – Keep only elements for which an applied criterion function returns TRUE.i_keepwhile – Keep elements only until an applied criterion returns FALSE.i_limit – Keep only the first \(n\) elements from the given iteror.i_mask – Return elements for which a parallel iterator is TRUE.i_rle – Compress runs of identical adjacent elements, returning one value and a run length.i_rleinv – Inverse transform of i_rle.i_timeout – Return elements only until the timeout is reached.i_unique – Pass along only unique elements of an iterator, using a hash table.i_chain – String all values from each iterable argument together.i_concat – String an iterable of iterables together.i_roundrobin – Return one element at a time from each of a series of iterors in rotation.i_tee – Split an iterator into multiple iterators yielding the same sequence.i_zip – Combine corresponding elements of parallel iterators into a list.i_zip_longest – i_zip but pad any iterators that end early.