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Implement kmath-nd4j: module that implements NDStructure for INDArray of ND4J #116

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CommanderTvis merged 50 commits from nd4j into dev 2020-10-29 19:58:53 +03:00
Conversation 2 Commits 50 Files Changed 19 +26 -4
2 changed files with 26 additions and 4 deletions
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13
kmath-nd4j/src/main/kotlin/scientifik.kmath.nd4j/INDArrayStructures.kt
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@ -14,25 +14,30 @@ interface INDArrayStructure<T> : NDStructure<T> {
override fun elements(): Sequence<Pair<IntArray, T>> = Sequence(::elementsIterator)
}
data class INDArrayIntStructure(override val ndArray: INDArray) : INDArrayStructure<Int>, MutableNDStructure<Int> {
inline class INDArrayIntStructure(override val ndArray: INDArray) : INDArrayStructure<Int>, MutableNDStructure<Int> {
override fun elementsIterator(): Iterator<Pair<IntArray, Int>> = INDArrayIntIterator(ndArray)
override fun get(index: IntArray): Int = ndArray.getInt(*index)
override fun set(index: IntArray, value: Int): Unit = run { ndArray.putScalar(index, value) }
override fun toString(): String = "INDArrayIntStructure(ndArray=$ndArray)"
}
data class INDArrayLongStructure(override val ndArray: INDArray) : INDArrayStructure<Long> {
inline class INDArrayLongStructure(override val ndArray: INDArray) : INDArrayStructure<Long> {
override fun elementsIterator(): Iterator<Pair<IntArray, Long>> = INDArrayLongIterator(ndArray)
override fun get(index: IntArray): Long = ndArray.getLong(*widenToLongArray(index))
override fun toString(): String = "INDArrayLongStructure(ndArray=$ndArray)"
}
data class INDArrayDoubleStructure(override val ndArray: INDArray) : INDArrayStructure<Double>, MutableNDStructure<Double> {
inline class INDArrayDoubleStructure(override val ndArray: INDArray) : INDArrayStructure<Double>, MutableNDStructure<Double> {
override fun elementsIterator(): Iterator<Pair<IntArray, Double>> = INDArrayDoubleIterator(ndArray)
override fun get(index: IntArray): Double = ndArray.getDouble(*index)
override fun set(index: IntArray, value: Double): Unit = run { ndArray.putScalar(index, value) }
override fun toString(): String = "INDArrayDoubleStructure(ndArray=$ndArray)"
}
data class INDArrayFloatStructure(override val ndArray: INDArray) : INDArrayStructure<Float>, MutableNDStructure<Float> {
inline class INDArrayFloatStructure(override val ndArray: INDArray) : INDArrayStructure<Float>, MutableNDStructure<Float> {
override fun elementsIterator(): Iterator<Pair<IntArray, Float>> = INDArrayFloatIterator(ndArray)
override fun get(index: IntArray): Float = ndArray.getFloat(*index)
override fun set(index: IntArray, value: Float): Unit = run { ndArray.putScalar(index, value) }
override fun toString(): String = "INDArrayFloatStructure(ndArray=$ndArray)"
}

17
kmath-nd4j/src/test/kotlin/scientifik/kmath/nd4j/INDArrayStructureTest.kt
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@ -4,6 +4,7 @@ import org.nd4j.linalg.factory.Nd4j
import scientifik.kmath.structures.get
import kotlin.test.Test
import kotlin.test.assertEquals
import kotlin.test.assertNotEquals
internal class INDArrayStructureTest {
@Test
@ -25,9 +26,25 @@ internal class INDArrayStructureTest {
fun testEquals() {
val nd1 = Nd4j.create(doubleArrayOf(1.0, 2.0, 3.0))!!
val struct1 = INDArrayDoubleStructure(nd1)
assertEquals(struct1, struct1)
assertNotEquals(struct1, null as INDArrayDoubleStructure?)
val nd2 = Nd4j.create(doubleArrayOf(1.0, 2.0, 3.0))!!
val struct2 = INDArrayDoubleStructure(nd2)
assertEquals(struct1, struct2)
assertEquals(struct2, struct1)
val nd3 = Nd4j.create(doubleArrayOf(1.0, 2.0, 3.0))!!
val struct3 = INDArrayDoubleStructure(nd3)
assertEquals(struct2, struct3)
assertEquals(struct1, struct3)
}
@Test
fun testHashCode() {
val nd1 = Nd4j.create(doubleArrayOf(1.0, 2.0, 3.0))!!
val struct1 = INDArrayDoubleStructure(nd1)
val nd2 = Nd4j.create(doubleArrayOf(1.0, 2.0, 3.0))!!
val struct2 = INDArrayDoubleStructure(nd2)
assertEquals(struct1.hashCode(), struct2.hashCode())
}
@Test