GitHub

new_null_array panics when constructing a struct of a dictionary #7571

new_null_array( &DataType::Struct(Fields::from(vec![Field::new( "non_nullable_deeper_inner", DataType::Dictionary(Box::new(DataType::Utf8), Box::new(DataType::Int32 ...
GitHub

[Python] pyarrow.nulls doesn't return a valid array for non-nullable nested fields

I guess it's because pyarrow.nulls initialize the nested arrays to nulls, but they are not nullable so they should be initialized to default values. Alternatively, the cast / validate method should ...
IEEE

Third-Order Nested Array: An Optimal Geometry for Third-Order Cumulants Based Array Processing

Abstract: Several sparse linear array structures have recently been proposed to enhance the identifiability of direction-of-arrival estimation by using second-order or higher even-order statistics ...
Scientific Research Publishing

Granville, A. (1988) Nested Steiner n-Cycle Systems and Perpendicular Arrays. Journal of Combinatorial Mathematics and Combinatorial Computing, 3, 163-167.

ABSTRACT: An asymptotic existence of balanced incomplete block (BIB) designs and pairwise balanced designs (PBD) has been discussed in [1]-[3]. On the other hand, the existence of additive BIB designs ...
Ars Technica

Python, how to sort nested arrays?

Im guessing this is built into the language, but I can't seem to find anything on it, and I'm just trying to get it done, so here I am to ask. Have a nested array that my function is returning, and I ...