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v0.3.0-dev-9 #324

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altavir merged 265 commits from dev into master 2021-05-08 17:16:29 +03:00
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4 changed files with 17 additions and 32 deletions
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21
kmath-core/src/commonMain/kotlin/space/kscience/kmath/tensors/TensorAlgebra.kt
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@ -1,29 +1,10 @@
package space.kscience.kmath.tensors package space.kscience.kmath.tensors
import space.kscience.kmath.tensors.core.DoubleTensor
// https://proofwiki.org/wiki/Definition:Algebra_over_Ring // https://proofwiki.org/wiki/Definition:Algebra_over_Ring
public interface TensorAlgebra<T, TensorType : TensorStructure<T>> { public interface TensorAlgebra<T, TensorType : TensorStructure<T>> {
public fun TensorType.value(): T public fun TensorType.value(): T
//https://pytorch.org/docs/stable/generated/torch.full.html
public fun full(value: T, shape: IntArray): TensorType
public fun ones(shape: IntArray): TensorType
public fun zeros(shape: IntArray): TensorType
//https://pytorch.org/docs/stable/generated/torch.full_like.html#torch.full_like
public fun TensorType.fullLike(value: T): TensorType
public fun TensorType.zeroesLike(): TensorType
public fun TensorType.onesLike(): TensorType
//https://pytorch.org/docs/stable/generated/torch.eye.html
public fun eye(n: Int): TensorType
public fun TensorType.copy(): TensorType
public operator fun T.plus(other: TensorType): TensorType public operator fun T.plus(other: TensorType): TensorType
public operator fun TensorType.plus(value: T): TensorType public operator fun TensorType.plus(value: T): TensorType
public operator fun TensorType.plus(other: TensorType): TensorType public operator fun TensorType.plus(other: TensorType): TensorType
@ -53,8 +34,6 @@ public interface TensorAlgebra<T, TensorType : TensorStructure<T>> {
public fun TensorType.view(shape: IntArray): TensorType public fun TensorType.view(shape: IntArray): TensorType
public fun TensorType.viewAs(other: TensorType): TensorType public fun TensorType.viewAs(other: TensorType): TensorType
public fun TensorType.eq(other: TensorType, delta: T): Boolean
//https://pytorch.org/docs/stable/generated/torch.matmul.html //https://pytorch.org/docs/stable/generated/torch.matmul.html
public infix fun TensorType.dot(other: TensorType): TensorType public infix fun TensorType.dot(other: TensorType): TensorType

18
kmath-core/src/commonMain/kotlin/space/kscience/kmath/tensors/core/DoubleTensorAlgebra.kt
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@ -27,27 +27,27 @@ public open class DoubleTensorAlgebra : TensorPartialDivisionAlgebra<Double, Dou
return DoubleTensor(newShape, this.buffer.array(), newStart) return DoubleTensor(newShape, this.buffer.array(), newStart)
} }
override fun full(value: Double, shape: IntArray): DoubleTensor { public fun full(value: Double, shape: IntArray): DoubleTensor {
checkEmptyShape(shape) checkEmptyShape(shape)
val buffer = DoubleArray(shape.reduce(Int::times)) { value } val buffer = DoubleArray(shape.reduce(Int::times)) { value }
return DoubleTensor(shape, buffer) return DoubleTensor(shape, buffer)
} }
override fun DoubleTensor.fullLike(value: Double): DoubleTensor { public fun DoubleTensor.fullLike(value: Double): DoubleTensor {
val shape = this.shape val shape = this.shape
val buffer = DoubleArray(this.linearStructure.size) { value } val buffer = DoubleArray(this.linearStructure.size) { value }
return DoubleTensor(shape, buffer) return DoubleTensor(shape, buffer)
} }
override fun zeros(shape: IntArray): DoubleTensor = full(0.0, shape) public fun zeros(shape: IntArray): DoubleTensor = full(0.0, shape)
override fun DoubleTensor.zeroesLike(): DoubleTensor = this.fullLike(0.0) public fun DoubleTensor.zeroesLike(): DoubleTensor = this.fullLike(0.0)
override fun ones(shape: IntArray): DoubleTensor = full(1.0, shape) public fun ones(shape: IntArray): DoubleTensor = full(1.0, shape)
override fun DoubleTensor.onesLike(): DoubleTensor = this.fullLike(1.0) public fun DoubleTensor.onesLike(): DoubleTensor = this.fullLike(1.0)
override fun eye(n: Int): DoubleTensor { public fun eye(n: Int): DoubleTensor {
val shape = intArrayOf(n, n) val shape = intArrayOf(n, n)
val buffer = DoubleArray(n * n) { 0.0 } val buffer = DoubleArray(n * n) { 0.0 }
val res = DoubleTensor(shape, buffer) val res = DoubleTensor(shape, buffer)
@ -57,7 +57,7 @@ public open class DoubleTensorAlgebra : TensorPartialDivisionAlgebra<Double, Dou
return res return res
} }
override fun DoubleTensor.copy(): DoubleTensor { public fun DoubleTensor.copy(): DoubleTensor {
return DoubleTensor(this.shape, this.buffer.array().copyOf(), this.bufferStart) return DoubleTensor(this.shape, this.buffer.array().copyOf(), this.bufferStart)
} }
@ -299,7 +299,7 @@ public open class DoubleTensorAlgebra : TensorPartialDivisionAlgebra<Double, Dou
return this.contentEquals(other) { x, y -> abs(x - y) < delta } return this.contentEquals(other) { x, y -> abs(x - y) < delta }
} }
override fun DoubleTensor.eq(other: DoubleTensor, delta: Double): Boolean { public fun DoubleTensor.eq(other: DoubleTensor, delta: Double): Boolean {
return this.eq(other) { x, y -> abs(x - y) < delta } return this.eq(other) { x, y -> abs(x - y) < delta }
} }

8
kmath-core/src/commonMain/kotlin/space/kscience/kmath/tensors/core/utils.kt
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@ -1,7 +1,8 @@
package space.kscience.kmath.tensors.core package space.kscience.kmath.tensors.core
import space.kscience.kmath.structures.* import space.kscience.kmath.structures.*
import kotlin.random.Random
import kotlin.math.*
/** /**
* Returns a reference to [IntArray] containing all of the elements of this [Buffer]. * Returns a reference to [IntArray] containing all of the elements of this [Buffer].
@ -34,3 +35,8 @@ internal fun Buffer<Double>.array(): DoubleArray = when (this) {
is DoubleBuffer -> array is DoubleBuffer -> array
else -> throw RuntimeException("Failed to cast Buffer to DoubleArray") else -> throw RuntimeException("Failed to cast Buffer to DoubleArray")
} }
internal inline fun getRandomNormals(n: Int, seed: Long): DoubleArray {
val u = Random(seed)
return (0 until n).map { sqrt(-2.0 * u.nextDouble()) * cos(2.0 * PI * u.nextDouble()) }.toDoubleArray()
}