kmath/kmath-nd4j
Iaroslav Postovalov e9c31b7827
Merge branch 'master' into dev
# Conflicts:
#	README.md
#	build.gradle.kts
#	examples/src/main/kotlin/space/kscience/kmath/stat/DistributionBenchmark.kt
#	examples/src/main/kotlin/space/kscience/kmath/structures/ParallelRealNDField.kt
#	kmath-ast/README.md
#	kmath-ast/build.gradle.kts
#	kmath-ast/src/commonMain/kotlin/space/kscience/kmath/ast/MstExpression.kt
#	kmath-complex/README.md
#	kmath-complex/build.gradle.kts
#	kmath-complex/src/commonMain/kotlin/space/kscience/kmath/complex/ComplexNDField.kt
#	kmath-core/README.md
#	kmath-core/build.gradle.kts
#	kmath-core/src/commonMain/kotlin/space/kscience/kmath/expressions/MST.kt
#	kmath-core/src/commonMain/kotlin/space/kscience/kmath/expressions/MstAlgebra.kt
#	kmath-core/src/commonMain/kotlin/space/kscience/kmath/nd/RealNDField.kt
#	kmath-core/src/commonMain/kotlin/space/kscience/kmath/structures/RealBufferField.kt
#	kmath-coroutines/build.gradle.kts
#	kmath-coroutines/src/commonMain/kotlin/space/kscience/kmath/chains/BlockingRealChain.kt
#	kmath-coroutines/src/jvmMain/kotlin/space/kscience/kmath/structures/LazyNDStructure.kt
#	kmath-dimensions/src/commonTest/kotlin/kscience/dimensions/DMatrixContextTest.kt
#	kmath-for-real/README.md
#	kmath-functions/README.md
#	kmath-functions/src/commonMain/kotlin/space/kscience/kmath/interpolation/Interpolator.kt
#	kmath-functions/src/commonMain/kotlin/space/kscience/kmath/interpolation/LoessInterpolator.kt
#	kmath-functions/src/commonMain/kotlin/space/kscience/kmath/interpolation/XYPointSet.kt
#	kmath-geometry/build.gradle.kts
#	kmath-nd4j/README.md
#	kmath-nd4j/build.gradle.kts
#	kmath-stat/src/commonMain/kotlin/space/kscience/kmath/distributions/FactorizedDistribution.kt
#	kmath-stat/src/commonMain/kotlin/space/kscience/kmath/stat/Distribution.kt
#	kmath-stat/src/commonMain/kotlin/space/kscience/kmath/stat/Fitting.kt
#	kmath-stat/src/commonMain/kotlin/space/kscience/kmath/stat/OptimizationProblem.kt
#	kmath-stat/src/jvmMain/kotlin/space/kscience/kmath/stat/distributions.kt
#	kmath-viktor/src/main/kotlin/space/kscience/kmath/viktor/ViktorNDStructure.kt
2021-04-16 18:02:44 +07:00
..
docs Improve Dokka configuration 2021-03-22 20:41:18 +07:00
src Merge branch 'master' into dev 2021-04-16 18:02:44 +07:00
build.gradle.kts Merge branch 'master' into dev 2021-04-16 18:02:44 +07:00
README.md Some experiments with MST rendering 2021-03-31 16:12:07 +07:00

Module kmath-nd4j

ND4J based implementations of KMath abstractions.

Artifact:

The Maven coordinates of this project are space.kscience:kmath-nd4j:0.3.0-dev-4.

Gradle:

repositories {
    maven { url 'https://repo.kotlin.link' }
    maven { url 'https://dl.bintray.com/hotkeytlt/maven' }
    maven { url "https://dl.bintray.com/kotlin/kotlin-eap" } // include for builds based on kotlin-eap
}

dependencies {
    implementation 'space.kscience:kmath-nd4j:0.3.0-dev-4'
}

Gradle Kotlin DSL:

repositories {
    maven("https://repo.kotlin.link")
    maven("https://dl.bintray.com/kotlin/kotlin-eap") // include for builds based on kotlin-eap
    maven("https://dl.bintray.com/hotkeytlt/maven") // required for a
}

dependencies {
    implementation("space.kscience:kmath-nd4j:0.3.0-dev-4")
}

Examples

NDStructure wrapper for INDArray:

import org.nd4j.linalg.factory.*
import scientifik.kmath.nd4j.*
import scientifik.kmath.structures.*

val array = Nd4j.ones(2, 2).asDoubleStructure()
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 = DoubleNd4jArrayField(intArrayOf(2, 2))
val array = Nd4j.rand(2, 2).asDoubleStructure()

val res = field {
    (25.0 / array + 20) * 4
}

println(res.ndArray)
// [[  250.6449,  428.5840], 
//  [  269.7913,  202.2077]]

Contributed by Iaroslav Postovalov.