forked from kscience/kmath
.. | ||
src | ||
build.gradle.kts | ||
README.md |
ND4J NDStructure implementation (kmath-nd4j
)
This subproject implements the following features:
- NDStructure wrapper for INDArray.
- Optimized NDRing implementations for INDArray storing Ints and Longs.
- Optimized NDField implementations for INDArray storing Floats and Doubles.
Artifact:
This module is distributed in the artifact
scientifik:kmath-nd4j:0.1.4-dev-8
.Gradle:
repositories { mavenCentral() maven { url 'https://dl.bintray.com/mipt-npm/scientifik' } maven { url 'https://dl.bintray.com/mipt-npm/dev' } } dependencies { implementation 'scientifik:kmath-nd4j:0.1.4-dev-8' implementation 'org.nd4j:nd4j-native-platform:1.0.0-beta7' }
Gradle Kotlin DSL:
repositories { mavenCentral() maven("https://dl.bintray.com/mipt-npm/scientifik") maven("https://dl.bintray.com/mipt-npm/dev") } dependencies { implementation("scientifik:kmath-nd4j:0.1.4-dev-8") implementation("org.nd4j:nd4j-native-platform:1.0.0-beta7") }
This distribution also needs an implementation of ND4J API. The ND4J Native Platform is usually the fastest one, so it is included to the snippet.
Examples
NDStructure wrapper for INDArray:
import org.nd4j.linalg.factory.*
import scientifik.kmath.nd4j.*
import scientifik.kmath.structures.*
val array = Nd4j.ones(2, 2).asRealStructure()
println(array[0, 0]) // 1.0
array[intArrayOf(0, 0)] = 24.0
println(array[0, 0]) // 24.0
Fast element-wise and in-place arithmetics for INDArray:
import org.nd4j.linalg.factory.*
import scientifik.kmath.nd4j.*
import scientifik.kmath.operations.*
val field = RealINDArrayField(intArrayOf(2, 2))
val array = Nd4j.rand(2, 2).asRealStructure()
val res = field {
(25.0 / array + 20) * 4
}
println(res.ndArray)
// [[ 250.6449, 428.5840],
// [ 269.7913, 202.2077]]
Contributed by Iaroslav Postovalov.