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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
Conversation 0 Commits 265 Files Changed 182 +51 -28
3 changed files with 51 additions and 28 deletions
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12
kmath-core/src/commonMain/kotlin/space/kscience/kmath/tensors/TensorAlgebra.kt
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@ -3,19 +3,17 @@ package space.kscience.kmath.tensors
// https://proofwiki.org/wiki/Definition:Algebra_over_Ring
public interface TensorAlgebra<T, TensorType : TensorStructure<T>> {
//https://pytorch.org/docs/stable/generated/torch.full.html
public fun full(value: T, 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 zeros(shape: IntArray): TensorType
public fun TensorType.zeroesLike(): TensorType // mb it shouldn't be tensor but algebra method (like in numpy/torch) ?
public fun ones(shape: IntArray): TensorType
public fun TensorType.onesLike(): TensorType
//https://pytorch.org/docs/stable/generated/torch.full.html
public fun full(shape: IntArray, value: T): TensorType
//https://pytorch.org/docs/stable/generated/torch.full_like.html#torch.full_like
public fun TensorType.fullLike(value: T): TensorType
//https://pytorch.org/docs/stable/generated/torch.eye.html
public fun eye(n: Int): TensorType

35
kmath-core/src/commonMain/kotlin/space/kscience/kmath/tensors/core/DoubleTensorAlgebra.kt
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@ -20,23 +20,25 @@ public open class DoubleTensorAlgebra : TensorPartialDivisionAlgebra<Double, Dou
return DoubleTensor(newShape, this.buffer.array(), newStart)
}
override fun zeros(shape: IntArray): DoubleTensor {
TODO("Not yet implemented")
}
override fun DoubleTensor.zeroesLike(): DoubleTensor {
val shape = this.shape
val buffer = DoubleArray(this.strides.linearSize) { 0.0 }
override fun full(value: Double, shape: IntArray): DoubleTensor {
checkEmptyShape(shape)
val buffer = DoubleArray(shape.reduce(Int::times)) { value }
return DoubleTensor(shape, buffer)
}
override fun ones(shape: IntArray): DoubleTensor {
TODO("Not yet implemented")
override fun DoubleTensor.fullLike(value: Double): DoubleTensor {
val shape = this.shape
val buffer = DoubleArray(this.strides.linearSize) { value }
return DoubleTensor(shape, buffer)
}
override fun DoubleTensor.onesLike(): DoubleTensor {
TODO("Not yet implemented")
}
override fun zeros(shape: IntArray): DoubleTensor = full(0.0, shape)
override fun DoubleTensor.zeroesLike(): DoubleTensor = this.fullLike(0.0)
override fun ones(shape: IntArray): DoubleTensor = full(1.0, shape)
override fun DoubleTensor.onesLike(): DoubleTensor = this.fullLike(1.0)
override fun eye(n: Int): DoubleTensor {
val shape = intArrayOf(n, n)
@ -225,15 +227,6 @@ public open class DoubleTensorAlgebra : TensorPartialDivisionAlgebra<Double, Dou
TODO("Not yet implemented")
}
override fun full(shape: IntArray, value: Double): DoubleTensor {
TODO("Not yet implemented")
}
override fun DoubleTensor.fullLike(value: Double): DoubleTensor {
TODO("Not yet implemented")
}
override fun DoubleTensor.sum(dim: Int, keepDim: Boolean): DoubleTensor {
TODO("Not yet implemented")
}

32
kmath-core/src/commonTest/kotlin/space/kscience/kmath/tensors/core/TestDoubleTensorAlgebra.kt
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@ -47,4 +47,36 @@ class TestDoubleTensorAlgebra {
assertTrue(res12.buffer.array() contentEquals doubleArrayOf(1.0, 4.0, 2.0, 5.0, 3.0, 6.0))
}
@Test
fun linearStructure() = DoubleTensorAlgebra {
val shape = intArrayOf(3)
val tensorA = full(value = -4.5, shape = shape)
val tensorB = full(value = 10.9, shape = shape)
val tensorC = full(value = 789.3, shape = shape)
val tensorD = full(value = -72.9, shape = shape)
val tensorE = full(value = 553.1, shape = shape)
val result = 15.8 * tensorA - 1.5 * tensorB * (-tensorD) + 0.02 * tensorC / tensorE - 39.4
val expected = fromArray(
shape,
(1..3).map {
15.8 * (-4.5) - 1.5 * 10.9 * 72.9 + 0.02 * 789.3 / 553.1 - 39.4
}.toDoubleArray()
)
val assignResult = zeros(shape)
tensorA *= 15.8
tensorB *= 1.5
tensorB *= -tensorD
tensorC *= 0.02
tensorC /= tensorE
assignResult += tensorA
assignResult -= tensorB
assignResult += tensorC
assignResult += -39.4
assertTrue(expected.buffer.array() contentEquals result.buffer.array())
assertTrue(expected.buffer.array() contentEquals assignResult.buffer.array())
}
}