kmath-core/api/kmath-core.api

@@ -2745,6 +2745,34 @@ public class space/kscience/kmath/tensors/core/BufferedTensor : space/kscience/k
 	public final fun vectorSequence ()Lkotlin/sequences/Sequence;
 }
 
+public final class space/kscience/kmath/tensors/core/BufferedTensor1D : space/kscience/kmath/tensors/core/BufferedTensor, space/kscience/kmath/nd/MutableStructure1D {
+	public fun copy ()Lspace/kscience/kmath/structures/MutableBuffer;
+	public fun get (I)Ljava/lang/Object;
+	public fun get ([I)Ljava/lang/Object;
+	public fun getDimension ()I
+	public fun getSize ()I
+	public fun iterator ()Ljava/util/Iterator;
+	public fun set (ILjava/lang/Object;)V
+	public fun set ([ILjava/lang/Object;)V
+}
+
+public final class space/kscience/kmath/tensors/core/BufferedTensor2D : space/kscience/kmath/tensors/core/BufferedTensor, space/kscience/kmath/nd/MutableStructure2D {
+	public fun elements ()Lkotlin/sequences/Sequence;
+	public fun get (II)Ljava/lang/Object;
+	public fun get ([I)Ljava/lang/Object;
+	public fun getColNum ()I
+	public fun getColumns ()Ljava/util/List;
+	public fun getRowNum ()I
+	public fun getRows ()Ljava/util/List;
+	public fun getShape ()[I
+	public fun set (IILjava/lang/Object;)V
+}
+
+public final class space/kscience/kmath/tensors/core/BufferedTensorKt {
+	public static final fun as1D (Lspace/kscience/kmath/tensors/core/BufferedTensor;)Lspace/kscience/kmath/tensors/core/BufferedTensor1D;
+	public static final fun as2D (Lspace/kscience/kmath/tensors/core/BufferedTensor;)Lspace/kscience/kmath/tensors/core/BufferedTensor2D;
+}
+
 public final class space/kscience/kmath/tensors/core/DoubleAnalyticTensorAlgebra : space/kscience/kmath/tensors/core/DoubleTensorAlgebra, space/kscience/kmath/tensors/AnalyticTensorAlgebra {
 	public fun <init> ()V
 	public synthetic fun acos (Lspace/kscience/kmath/nd/MutableStructureND;)Lspace/kscience/kmath/nd/MutableStructureND;

kmath-core/src/commonMain/kotlin/space/kscience/kmath/tensors/core/BufferedTensor.kt

@@ -1,23 +1,26 @@
 package space.kscience.kmath.tensors.core
 
-import space.kscience.kmath.nd.*
+import space.kscience.kmath.nd.MutableStructure1D
+import space.kscience.kmath.nd.MutableStructure2D
 import space.kscience.kmath.structures.*
 import space.kscience.kmath.tensors.TensorStructure
-import kotlin.math.atanh
+
 
 
 public open class BufferedTensor<T>(
     override val shape: IntArray,
     public val buffer: MutableBuffer<T>,
     internal val bufferStart: Int
-) : TensorStructure<T>
+) : TensorStructure<T> {
-{
     public val linearStructure: TensorLinearStructure
         get() = TensorLinearStructure(shape)
 
     public val numel: Int
         get() = linearStructure.size
 
+    internal constructor(tensor: BufferedTensor<T>) :
+            this(tensor.shape, tensor.buffer, tensor.bufferStart)
+
     override fun get(index: IntArray): T = buffer[bufferStart + linearStructure.offset(index)]
 
     override fun set(index: IntArray, value: T) {
@@ -32,7 +35,7 @@ public open class BufferedTensor<T>(
 
     override fun hashCode(): Int = 0
 
-    public fun vectorSequence(): Sequence<MutableStructure1D<T>> = sequence {
+    public fun vectorSequence(): Sequence<BufferedTensor1D<T>> = sequence {
         check(shape.size >= 1) { "todo" }
         val n = shape.size
         val vectorOffset = shape[n - 1]
@@ -43,7 +46,7 @@ public open class BufferedTensor<T>(
         }
     }
 
-    public fun matrixSequence(): Sequence<MutableStructure2D<T>> = sequence {
+    public fun matrixSequence(): Sequence<BufferedTensor2D<T>> = sequence {
         check(shape.size >= 2) { "todo" }
         val n = shape.size
         val matrixOffset = shape[n - 1] * shape[n - 2]
@@ -54,13 +57,13 @@ public open class BufferedTensor<T>(
         }
     }
 
-    public inline fun forEachVector(vectorAction : (MutableStructure1D<T>) -> Unit): Unit {
+    public inline fun forEachVector(vectorAction: (BufferedTensor1D<T>) -> Unit): Unit {
         for (vector in vectorSequence()) {
             vectorAction(vector)
         }
     }
 
-    public inline fun forEachMatrix(matrixAction : (MutableStructure2D<T>) -> Unit): Unit {
+    public inline fun forEachMatrix(matrixAction: (BufferedTensor2D<T>) -> Unit): Unit {
         for (matrix in matrixSequence()) {
             matrixAction(matrix)
         }
@@ -74,21 +77,125 @@ public class IntTensor internal constructor(
     buffer: IntArray,
     offset: Int = 0
 ) : BufferedTensor<Int>(shape, IntBuffer(buffer), offset)
+{
+    internal constructor(bufferedTensor: BufferedTensor<Int>):
+            this(bufferedTensor.shape, bufferedTensor.buffer.array(), bufferedTensor.bufferStart)
+}
 
 public class LongTensor internal constructor(
     shape: IntArray,
     buffer: LongArray,
     offset: Int = 0
 ) : BufferedTensor<Long>(shape, LongBuffer(buffer), offset)
+{
+    internal constructor(bufferedTensor: BufferedTensor<Long>):
+            this(bufferedTensor.shape, bufferedTensor.buffer.array(), bufferedTensor.bufferStart)
+}
 
 public class FloatTensor internal constructor(
     shape: IntArray,
     buffer: FloatArray,
     offset: Int = 0
 ) : BufferedTensor<Float>(shape, FloatBuffer(buffer), offset)
+{
+    internal constructor(bufferedTensor: BufferedTensor<Float>):
+            this(bufferedTensor.shape, bufferedTensor.buffer.array(), bufferedTensor.bufferStart)
+}
 
 public class DoubleTensor internal constructor(
     shape: IntArray,
     buffer: DoubleArray,
     offset: Int = 0
 ) : BufferedTensor<Double>(shape, DoubleBuffer(buffer), offset)
+{
+    internal constructor(bufferedTensor: BufferedTensor<Double>):
+            this(bufferedTensor.shape, bufferedTensor.buffer.array(), bufferedTensor.bufferStart)
+}
+
+
+public class BufferedTensor2D<T> internal constructor(
+    private val tensor: BufferedTensor<T>,
+) : BufferedTensor<T>(tensor), MutableStructure2D<T> {
+    init {
+        check(shape.size == 2) {
+            "Shape ${shape.toList()} not compatible with DoubleTensor2D"
+        }
+    }
+
+    override val shape: IntArray
+        get() = tensor.shape
+
+    override val rowNum: Int
+        get() = shape[0]
+    override val colNum: Int
+        get() = shape[1]
+
+    override fun get(i: Int, j: Int): T = tensor[intArrayOf(i, j)]
+
+    override fun get(index: IntArray): T = tensor[index]
+
+    override fun elements(): Sequence<Pair<IntArray, T>> = tensor.elements()
+
+    override fun set(i: Int, j: Int, value: T) {
+        tensor[intArrayOf(i, j)] = value
+    }
+
+    override val rows: List<BufferedTensor1D<T>>
+        get() = List(rowNum) { i ->
+            BufferedTensor1D(
+                BufferedTensor(
+                    shape = intArrayOf(colNum),
+                    buffer = VirtualMutableBuffer(colNum) { j -> get(i, j) },
+                    bufferStart = 0
+                )
+            )
+        }
+
+    override val columns: List<BufferedTensor1D<T>>
+        get() = List(colNum) { j ->
+            BufferedTensor1D(
+                BufferedTensor(
+                    shape = intArrayOf(rowNum),
+                    buffer = VirtualMutableBuffer(rowNum) { i -> get(i, j) },
+                    bufferStart = 0
+                )
+            )
+        }
+}
+
+public class BufferedTensor1D<T> internal constructor(
+    private val tensor: BufferedTensor<T>
+) : BufferedTensor<T>(tensor), MutableStructure1D<T> {
+    init {
+        check(shape.size == 1) {
+            "Shape ${shape.toList()} not compatible with DoubleTensor1D"
+        }
+    }
+
+    override fun get(index: IntArray): T = tensor[index]
+
+    override fun set(index: IntArray, value: T) {
+        tensor[index] = value
+    }
+
+    override val size: Int
+        get() = tensor.linearStructure.size
+
+    override fun get(index: Int): T = tensor[intArrayOf(index)]
+
+    override fun set(index: Int, value: T) {
+        tensor[intArrayOf(index)] = value
+    }
+
+    override fun copy(): MutableBuffer<T> = tensor.buffer.copy()
+
+}
+
+internal fun BufferedTensor<Int>.asIntTensor(): IntTensor = IntTensor(this)
+internal fun BufferedTensor<Long>.asLongTensor(): LongTensor = LongTensor(this)
+internal fun BufferedTensor<Float>.asFloatTensor(): FloatTensor = FloatTensor(this)
+internal fun BufferedTensor<Double>.asDoubleTensor(): DoubleTensor = DoubleTensor(this)
+
+
+public fun <T> BufferedTensor<T>.as2D(): BufferedTensor2D<T> = BufferedTensor2D(this)
+public fun <T> BufferedTensor<T>.as1D(): BufferedTensor1D<T> = BufferedTensor1D(this)

kmath-core/src/commonMain/kotlin/space/kscience/kmath/tensors/core/DoubleLinearOpsTensorAlgebra.kt

@@ -1,8 +1,5 @@
 package space.kscience.kmath.tensors.core
 
-import space.kscience.kmath.nd.MutableStructure2D
-import space.kscience.kmath.nd.Structure1D
-import space.kscience.kmath.nd.Structure2D
 import space.kscience.kmath.tensors.LinearOpsTensorAlgebra
 import kotlin.math.sqrt
 
@@ -153,7 +150,7 @@ public class DoubleLinearOpsTensorAlgebra :
         TODO("ANDREI")
     }
 
-    private fun luMatrixDet(lu: Structure2D<Double>, pivots: Structure1D<Int>): Double {
+    private fun luMatrixDet(lu: BufferedTensor2D<Double>, pivots: BufferedTensor1D<Int>): Double {
         val m = lu.shape[0]
         val sign = if((pivots[m] - m) % 2 == 0) 1.0 else -1.0
         return (0 until m).asSequence().map { lu[it, it] }.fold(sign) { left, right -> left * right }
@@ -180,9 +177,9 @@ public class DoubleLinearOpsTensorAlgebra :
     }
 
     private fun luMatrixInv(
-        lu: Structure2D<Double>,
+        lu: BufferedTensor2D<Double>,
-        pivots: Structure1D<Int>,
+        pivots: BufferedTensor1D<Int>,
-        invMatrix : MutableStructure2D<Double>
+        invMatrix : BufferedTensor2D<Double>
     ): Unit {
         val m = lu.shape[0]
 

kmath-core/src/commonTest/kotlin/space/kscience/kmath/tensors/core/TestDoubleLinearOpsAlgebra.kt

@@ -1,7 +1,6 @@
 package space.kscience.kmath.tensors.core
 
 import kotlin.math.abs
-import kotlin.math.exp
 import kotlin.test.Test
 import kotlin.test.assertEquals
 import kotlin.test.assertTrue

kmath-core/src/commonTest/kotlin/space/kscience/kmath/tensors/core/TestDoubleTensor.kt

@@ -1,8 +1,5 @@
 package space.kscience.kmath.tensors.core
 
-
-import space.kscience.kmath.nd.as1D
-import space.kscience.kmath.nd.as2D
 import space.kscience.kmath.structures.toDoubleArray
 import kotlin.test.Test
 import kotlin.test.assertEquals