创建分块数组
参数
- ...
要强制转换为 ChunkedArray 的 R 对象。它们必须是相同类型。
- type
可选的 数据类型。如果省略，将从数据推断类型。
示例
# Pass items into chunked_array as separate objects to create chunks
class_scores <- chunked_array(c(87, 88, 89), c(94, 93, 92), c(71, 72, 73))
# If you pass a list into chunked_array, you get a list of length 1
list_scores <- chunked_array(list(c(9.9, 9.6, 9.5), c(8.2, 8.3, 8.4), c(10.0, 9.9, 9.8)))
# When constructing a ChunkedArray, the first chunk is used to infer type.
infer_type(chunked_array(c(1, 2, 3), c(5L, 6L, 7L)))
#> Float64
#> double
# Concatenating chunked arrays returns a new chunked array containing all chunks
a <- chunked_array(c(1, 2), 3)
b <- chunked_array(c(4, 5), 6)
c(a, b)
#> ChunkedArray
#> <double>
#> [
#> [
#> 1,
#> 2
#> ],
#> [
#> 3
#> ],
#> [
#> 4,
#> 5
#> ],
#> [
#> 6
#> ]
#> ]