A toolbox for working with R arrays in a functional programming style. Flexibly split, bind, reshape, modify, subset, and name arrays.
The package provides:
split_along_dim() which take an array and return a list.
bind_as_dim() take a list and return an array.
modify_along_dim() takes an array, calls the passed function
.f() on each subset of the specified dimension, and returns an array of the same shape. (think of this as a safer and sometimes faster alternative to
base::apply() that is guaranteed to return an array of the same shape as it received)
extract_dim() a wrapper around
[ that allows you to specify the dimension being subset as a function argument. For example,
extract_dim(X, 1, idx) will extract
idx on the first dimension, regardless how many dimensions are in the array
X. Contrast this with the base alternative
X[idx,,], where you have to match the number of commas
, to the number of dimensions in
Many of the functions have two variants
*_cols() for the two most common case of the first and last dimension. For example
split_on_rows() which is equivalent to
split_on_dim(X, 1) and
split_on_cols() which is equivalent to
set_dimnames(), pipe-friendly and more flexible versions of
array2(), which reshape or fills arrays using row-major (C-style) semantics
A handful of lower-level helpers that abstract out patterns commonly encountered while working with arrays, for example
expand_dims() (the inverse of
seq_along_rows() (a combination of
A set of functions that help encode atomic vectors as
onehot() binary matrix’s and
decode_onehot() back into atomic vectors. (for example if training a neural network with keras)
Many of the functions work recursively if provided a list of arrays.