NEWS

S4Arrays 1.12.0

arep_times() and arep_each(): multidimensional versions of base::rep( , times=) and base::rep( , each=).
as_tile(): a convenient way to control the direction of recycling in the context of arithmetic and other binary operations between an array and a vector, or between two arrays of distinct dimensions. Still work-in-progress!
kronecker() methods for Array objects that work out-of-the-box on Array derivatives that support [ and *.

Add fast colsum() method for ordinary matrices.
Define low-level generics: - subset_Array_by_logical_array() - subset_Array_by_Lindex() - subset_Array_by_Mindex() - subset_Array_by_Nindex() with default methods. Their purpose is to support subsetting ('[') of Array derivatives and to make it easier for developers of Array extensions to implement subsetting for their objects. They are not intended to be used directly by the end user.
Define low-level generics: - subassign_Array_by_logical_array() - subassign_Array_by_Lindex() - subassign_Array_by_Mindex() - subassign_Array_by_Nindex() with default methods. Their purpose is to support subassignment ('[<-') of Array derivatives and to make it easier for developers of Array extensions to implement subassignment for their objects. They are not intended to be used directly by the end user.

read_block() now uses SparseArray::extract_sparse_array() instead of DelayedArray::OLD_extract_sparse_array() behind the scene to extract and load sparse blocks from a sparse array-like object. As a consequence, sparse blocks are now returned as SparseArray objects (implemented in the SparseArray package) instead of SparseArraySeed objects (implemented in the DelayedArray package).