The SOMA Re-Indexer

A re-indexer for unique integer indices

Methods

Public methods

• IntIndexer$new()

• IntIndexer$get_indexer()

• IntIndexer$clone()

---

Method new()

Create a new re-indexer

Usage

IntIndexer$new(data)

Arguments

data

Integer keys used to build the index (hash) table

---

Method get_indexer()

Get the underlying indices for the target data

Usage

IntIndexer$get_indexer(target, nomatch_na = FALSE)

Arguments

target

Data to re-index

nomatch_na

Set non-matches to NA instead of -1

Returns

A vector of 64-bit integers with target re-indexed

---

Method clone()

The objects of this class are cloneable with this method.

Usage

IntIndexer$clone(deep = FALSE)

Arguments

deep

Whether to make a deep clone.

Examples

(keys <- c(-10000, -100000, 200000, 5, 1, 7))
#> [1] -1e+04 -1e+05  2e+05  5e+00  1e+00  7e+00
(lookups <- unlist(replicate(n = 4L, c(-1L, 1:5), simplify = FALSE)))
#>  [1] -1  1  2  3  4  5 -1  1  2  3  4  5 -1  1  2  3  4  5 -1  1  2  3  4  5

indexer <- IntIndexer$new(keys)
indexer$get_indexer(lookups)
#> integer64
#>  [1] -1 4  -1 -1 -1 3  -1 4  -1 -1 -1 3  -1 4  -1 -1 -1 3  -1 4  -1 -1 -1 3 
indexer$get_indexer(lookups, nomatch_na = TRUE)
#> integer64
#>  [1] <NA> 4    <NA> <NA> <NA> 3    <NA> 4    <NA> <NA> <NA> 3    <NA> 4    <NA>
#> [16] <NA> <NA> 3    <NA> 4    <NA> <NA> <NA> 3