innermap: Apply a function to a list or atomic vector using its two...

In MarceloRTonon/innermap: Use map with two elements of the same vector

Description

The innermap function applies a function to a list or atomic vectors using its two of their elements in sequence as input. It is different from purrr::accumulate() since it does not use any of its output as an input. Although the innermap family accepts atomic as inputs, the use of the innerApply() function is way more faster.

Usage

innermap(input, .f0, distance = 1, .names = "after")

innermap_lgl(input, .f0, distance = 1)

innermap_int(input, .f0, distance = 1)

innermap_dbl(input, .f0, distance = 1)

innermap_chr(input, .f0, distance = 1)

innermap_raw(input, .f0, distance = 1)

innermap_dfr(input, .f0, distance = 1)

innermap_dfc(input, .f0, distance = 1)

Arguments

input	A list or atomic vector.
.f0	A function, formula, or vector (not necessarily atomic) If a __function__, it is used as is. If a __formula__, e.g. '~ .x + 2', it is converted to a function. There are three ways to refer to the arguments: * For a single argument function, use '.' * For a two argument function, use '.x' and '.y' * For more arguments, use '..1', '..2', '..3' etc This syntax allows you to create very compact anonymous functions. Note that formula functions conceptually take dots (that's why you can use '..1' etc). They silently ignore additional arguments that are not used in the formula expression.
distance	The distance between each element of the vector. The default value is 1.

Value

* innermap returns a list with the lenght equals of the input minus the distance argument.. * innermap_lgl, innermap_dbl, innermap_int, innermap_chr and innermpa_raw return a atomic vector the type of the pronoun, with the lenght equals of the input minus the distance argument. * innermap_dfr and innermap_dfc returns a data.frame

See Also

innerApply for applying a function to sequentional elements of an atomic vector, is way more faster than any element of the innermap family.

Examples

library(plyr)
library(magrittr)

# Making cell to cell operations

plyr::alply(ozone, 3) %>%
innermap(`/`)


# Making logical operations for the matrices as a
# whole and returning a logical vector

plyr::alply(ozone,3) %>%
innermap_lgl(identical)

# Making logical operations for the matrices elements
# and creating a data frame by column-binding it.

plyr::alply(ozone, 3, colMeans) %>%
innermap(function(x,y) x <= y)

# Using all.equal for the matrices and returning a character vector.

plyr::alply(ozone, 3) %>%
innermap_chr(function(x,y) all.equal(x,y)[1], distance =2)

MarceloRTonon/innermap documentation built on Oct. 29, 2021, 3 p.m.