com.eignex.koblas/dense/MatrixWindow

MatrixWindow

class MatrixWindow : MatrixOperand(source)

Validated two-stride window. A(i, j) addresses offset + i * rowStride + j * columnStride. Negative strides are supported; distinct logical entries must address distinct storage. Structured windows start square; window can select rectangular panels. transposed records an already applied transpose; strides, dimensions and structure describe the resulting logical matrix. Storage is borrowed and mutations require synchronization by the caller.

Constructors

MatrixWindow

constructor(data: DoubleArray, rows: Int, columns: Int, offset: Int = 0, rowStride: Int = 1, columnStride: Int = maxOf(1, rows), structure: MatrixStructure = MatrixStructure.General, transposed: Boolean = false)(source)

Creates a full matrix window; structured inputs must be square before taking subwindows.

Properties

columns

open override val columns: Int(source)

Logical column count, after any baked transpose.

columnStride

val columnStride: Int(source)

Physical distance between adjacent columns.

data

val data: DoubleArray(source)

Borrowed backing array.

diagonalOffset

val diagonalOffset: Int(source)

Row origin minus column origin within the structured parent.

offset

val offset: Int(source)

First physical entry of the window.

rows

open override val rows: Int(source)

Logical row count, after any baked transpose.

rowStride

val rowStride: Int(source)

Physical distance between adjacent rows.

structure

val structure: MatrixStructure(source)

Stored structure of the logical input.

transposed

val transposed: Boolean(source)

Whether a transpose is already represented by this operand.

Functions

get

operator fun get(row: Int, column: Int): Double(source)

Reads one logical entry, applying the declared structure.

transpose

fun transpose(): MatrixWindow(source)

A zero-copy transpose, including reversal of the selected stored triangle.

window

fun window(row: Int, rows: Int, column: Int, columns: Int): MatrixWindow(source)

A zero-copy logical block. Structured blocks retain parent coordinates, so symmetric mirroring can read the corresponding stored entry outside the block while staying inside the validated parent allocation.