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Add multik dot for tensors

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This commit is contained in:
Alexander Nozik 2021-10-19 10:50:13 +03:00
parent 98bbc8349c
commit 40c02f4bd7
1 changed files with 30 additions and 4 deletions
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34
kmath-multik/src/main/kotlin/space/kscience/kmath/multik/MultikTensorAlgebra.kt
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@ -3,9 +3,14 @@
* Use of this source code is governed by the Apache 2.0 license that can be found in the LICENSE file.
*/
@file:Suppress("unused")
package space.kscience.kmath.multik
import org.jetbrains.kotlinx.multik.api.Multik
import org.jetbrains.kotlinx.multik.api.linalg.dot
import org.jetbrains.kotlinx.multik.api.mk
import org.jetbrains.kotlinx.multik.api.ndarrayOf
import org.jetbrains.kotlinx.multik.api.zeros
import org.jetbrains.kotlinx.multik.ndarray.data.*
import org.jetbrains.kotlinx.multik.ndarray.operations.*
@ -30,8 +35,20 @@ public value class MultikTensor<T>(public val array: MutableMultiArray<T, DN>) :
}
}
private fun <T, D : Dimension> MultiArray<T, D>.asD1Array(): D1Array<T> {
if (this is NDArray<T, D>)
return this.asD1Array()
else throw ClassCastException("Cannot cast MultiArray to NDArray.")
}
public class MultikTensorAlgebra<T> internal constructor(
private fun <T, D : Dimension> MultiArray<T, D>.asD2Array(): D2Array<T> {
if (this is NDArray<T, D>)
return this.asD2Array()
else throw ClassCastException("Cannot cast MultiArray to NDArray.")
}
public class MultikTensorAlgebra<T : Number> internal constructor(
public val type: DataType,
public val elementAlgebra: Ring<T>,
public val comparator: Comparator<T>
@ -162,9 +179,18 @@ public class MultikTensorAlgebra<T> internal constructor(
override fun Tensor<T>.viewAs(other: Tensor<T>): MultikTensor<T> = view(other.shape)
override fun Tensor<T>.dot(other: Tensor<T>): MultikTensor<T> {
TODO("Not yet implemented")
}
override fun Tensor<T>.dot(other: Tensor<T>): MultikTensor<T> =
if (this.shape.size == 1 && other.shape.size == 1) {
Multik.ndarrayOf(
asMultik().array.asD1Array() dot other.asMultik().array.asD1Array()
).asDNArray().wrap()
} else if (this.shape.size == 2 && other.shape.size == 2) {
(asMultik().array.asD2Array() dot other.asMultik().array.asD2Array()).asDNArray().wrap()
} else if(this.shape.size == 2 && other.shape.size == 1) {
(asMultik().array.asD2Array() dot other.asMultik().array.asD1Array()).asDNArray().wrap()
} else {
TODO("Not implemented for broadcasting")
}
override fun diagonalEmbedding(diagonalEntries: Tensor<T>, offset: Int, dim1: Int, dim2: Int): MultikTensor<T> {
TODO("Diagonal embedding not implemented")