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Make several NDStructures mutable

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Iaroslav 2020-06-29 00:14:01 +07:00
parent f55b2c7a40
commit 3b18000f1e
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2 changed files with 18 additions and 6 deletions
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10
kmath-nd4j/src/main/kotlin/scientifik.kmath.nd4j/INDArrayStructures.kt
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@ -1,6 +1,7 @@
package scientifik.kmath.nd4j
import org.nd4j.linalg.api.ndarray.INDArray
import scientifik.kmath.structures.MutableNDStructure
import scientifik.kmath.structures.NDStructure
interface INDArrayStructure<T> : NDStructure<T> {
@ -13,9 +14,10 @@ interface INDArrayStructure<T> : NDStructure<T> {
override fun elements(): Sequence<Pair<IntArray, T>> = Sequence(::elementsIterator)
}
data class INDArrayIntStructure(override val ndArray: INDArray) : INDArrayStructure<Int> {
data 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) }
}
data class INDArrayLongStructure(override val ndArray: INDArray) : INDArrayStructure<Long> {
@ -23,12 +25,14 @@ data class INDArrayLongStructure(override val ndArray: INDArray) : INDArrayStruc
override fun get(index: IntArray): Long = ndArray.getLong(*widenToLongArray(index))
}
data class INDArrayDoubleStructure(override val ndArray: INDArray) : INDArrayStructure<Double> {
data 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) }
}
data class INDArrayFloatStructure(override val ndArray: INDArray) : INDArrayStructure<Float> {
data 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) }
}

14
kmath-nd4j/src/test/kotlin/scientifik/kmath/nd4j/INDArrayStructureTest.kt
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@ -1,9 +1,9 @@
package scientifik.kmath.nd4j
import org.nd4j.linalg.factory.Nd4j
import scientifik.kmath.structures.get
import kotlin.test.Test
import kotlin.test.assertEquals
import scientifik.kmath.structures.get
internal class INDArrayStructureTest {
@Test
@ -17,7 +17,7 @@ internal class INDArrayStructureTest {
@Test
fun testShape() {
val nd = Nd4j.rand(10, 2, 3, 6)!!
val struct = INDArrayIntStructure(nd)
val struct = INDArrayLongStructure(nd)
assertEquals(intArrayOf(10, 2, 3, 6).toList(), struct.shape.toList())
}
@ -33,7 +33,7 @@ internal class INDArrayStructureTest {
@Test
fun testDimension() {
val nd = Nd4j.rand(8, 16, 3, 7, 1)!!
val struct = INDArrayIntStructure(nd)
val struct = INDArrayFloatStructure(nd)
assertEquals(5, struct.dimension)
}
@ -43,4 +43,12 @@ internal class INDArrayStructureTest {
val struct = INDArrayIntStructure(nd)
assertEquals(nd.getInt(0, 0, 0, 0), struct[0, 0, 0, 0])
}
@Test
fun testSet() {
val nd = Nd4j.rand(17, 12, 4, 8)!!
val struct = INDArrayIntStructure(nd)
struct[intArrayOf(1, 2, 3, 4)] = 777
assertEquals(777, struct[1, 2, 3, 4])
}
}