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fixes #323

Merged
AndreiKingsley merged 3 commits from andrew into feature/tensor-algebra 2021-05-07 23:34:57 +03:00
Conversation 0 Commits 3 Files Changed 6 +8 -42
6 changed files with 8 additions and 42 deletions
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40
kmath-tensors/src/commonMain/kotlin/space/kscience/kmath/tensors/core/tensorCasts.kt
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@ -9,17 +9,17 @@ import space.kscience.kmath.tensors.api.Tensor
import space.kscience.kmath.tensors.core.internal.tensor
/**
* Casts [Tensor<Double>] to [DoubleTensor]
* Casts [Tensor] of [Double] to [DoubleTensor]
*/
public fun Tensor<Double>.toDoubleTensor(): DoubleTensor = this.tensor
/**
* Casts [Tensor<Int>] to [IntTensor]
* Casts [Tensor] of [Int] to [IntTensor]
*/
public fun Tensor<Int>.toIntTensor(): IntTensor = this.tensor
/**
* @return [DoubleArray] of tensor elements
* Returns [DoubleArray] of tensor elements
*/
public fun DoubleTensor.toDoubleArray(): DoubleArray {
return DoubleArray(numElements) { i ->
@ -28,42 +28,10 @@ public fun DoubleTensor.toDoubleArray(): DoubleArray {
}
/**
* @return [IntArray] of tensor elements
* Returns [IntArray] of tensor elements
*/
public fun IntTensor.toIntArray(): IntArray {
return IntArray(numElements) { i ->
mutableBuffer[bufferStart + i]
}
}
/**
* Casts [Array<DoubleArray>] to [DoubleTensor]
*/
public fun Array<DoubleArray>.toDoubleTensor(): DoubleTensor {
val n = size
check(n > 0) { "An empty array cannot be casted to tensor" }
val m = first().size
check(m > 0) { "Inner arrays must have at least 1 argument" }
check(all { size == m }) { "Inner arrays must be the same size" }
val shape = intArrayOf(n, m)
val buffer = this.flatMap { arr -> arr.map { it } }.toDoubleArray()
return DoubleTensor(shape, buffer, 0)
}
/**
* Casts [Array<IntArray>] to [IntTensor]
*/
public fun Array<IntArray>.toIntTensor(): IntTensor {
val n = size
check(n > 0) { "An empty array cannot be casted to tensor" }
val m = first().size
check(m > 0) { "Inner arrays must have at least 1 argument" }
check(all { size == m }) { "Inner arrays must be the same size" }
val shape = intArrayOf(n, m)
val buffer = this.flatMap { arr -> arr.map { it } }.toIntArray()
return IntTensor(shape, buffer, 0)
}

2
kmath-tensors/src/commonTest/kotlin/space/kscience/kmath/tensors/core/TestDoubleLinearOpsAlgebra.kt
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@ -194,5 +194,3 @@ private fun DoubleTensorAlgebra.testSVDFor(tensor: DoubleTensor, epsilon: Double
assertTrue(tensor.eq(tensorSVD, epsilon))
}