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Add proper equality check for EJML matrices

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This commit is contained in:
Alexander Nozik 2021-01-19 22:48:43 +03:00
parent d0c9d97706
commit 1c7bd05c58
4 changed files with 19 additions and 8 deletions
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2
kmath-core/src/commonMain/kotlin/kscience/kmath/linear/BufferMatrix.kt
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@ -43,7 +43,7 @@ public class BufferMatrix<T : Any>(
if (this === other) return true
return when (other) {
is NDStructure<*> -> NDStructure.equals(this, other)
is NDStructure<*> -> NDStructure.contentEquals(this, other)
else -> false
}
}

4
kmath-core/src/commonMain/kotlin/kscience/kmath/structures/NDStructure.kt
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@ -54,7 +54,7 @@ public interface NDStructure<T> {
/**
* Indicates whether some [NDStructure] is equal to another one.
*/
public fun equals(st1: NDStructure<*>, st2: NDStructure<*>): Boolean {
public fun contentEquals(st1: NDStructure<*>, st2: NDStructure<*>): Boolean {
if (st1 === st2) return true
// fast comparison of buffers if possible
@ -275,7 +275,7 @@ public abstract class NDBuffer<T> : NDStructure<T> {
override fun elements(): Sequence<Pair<IntArray, T>> = strides.indices().map { it to this[it] }
override fun equals(other: Any?): Boolean {
return NDStructure.equals(this, other as? NDStructure<*> ?: return false)
return NDStructure.contentEquals(this, other as? NDStructure<*> ?: return false)
}
override fun hashCode(): Int {

2
kmath-coroutines/src/jvmMain/kotlin/kscience/kmath/structures/LazyNDStructure.kt
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@ -24,7 +24,7 @@ public class LazyNDStructure<T>(
}
public override fun equals(other: Any?): Boolean {
return NDStructure.equals(this, other as? NDStructure<*> ?: return false)
return NDStructure.contentEquals(this, other as? NDStructure<*> ?: return false)
}
public override fun hashCode(): Int {

19
kmath-ejml/src/main/kotlin/kscience/kmath/ejml/EjmlMatrix.kt
View File

@ -3,6 +3,7 @@ package kscience.kmath.ejml
import kscience.kmath.linear.*
import kscience.kmath.misc.UnstableKMathAPI
import kscience.kmath.structures.Matrix
import kscience.kmath.structures.NDStructure
import kscience.kmath.structures.RealBuffer
import org.ejml.dense.row.factory.DecompositionFactory_DDRM
import org.ejml.simple.SimpleMatrix
@ -15,7 +16,7 @@ import kotlin.reflect.cast
* @property origin the underlying [SimpleMatrix].
* @author Iaroslav Postovalov
*/
public inline class EjmlMatrix(
public class EjmlMatrix(
public val origin: SimpleMatrix,
) : Matrix<Double> {
public override val rowNum: Int get() = origin.numRows()
@ -49,7 +50,7 @@ public inline class EjmlMatrix(
override val q: Matrix<Double> by lazy { EjmlMatrix(SimpleMatrix(qr.getQ(null, false))) }
override val r: Matrix<Double> by lazy { EjmlMatrix(SimpleMatrix(qr.getR(null, false))) }
}
CholeskyDecompositionFeature::class -> object : CholeskyDecompositionFeature<Double> {
CholeskyDecompositionFeature::class -> object : CholeskyDecompositionFeature<Double> {
override val l: Matrix<Double> by lazy {
val cholesky =
DecompositionFactory_DDRM.chol(rowNum, true).apply { decompose(origin.ddrm.copy()) }
@ -57,7 +58,7 @@ public inline class EjmlMatrix(
EjmlMatrix(SimpleMatrix(cholesky.getT(null))) + LFeature
}
}
LupDecompositionFeature::class -> object : LupDecompositionFeature<Double> {
LupDecompositionFeature::class -> object : LupDecompositionFeature<Double> {
private val lup by lazy {
DecompositionFactory_DDRM.lu(origin.numRows(), origin.numCols()).apply { decompose(origin.ddrm.copy()) }
}
@ -73,7 +74,17 @@ public inline class EjmlMatrix(
override val p: Matrix<Double> by lazy { EjmlMatrix(SimpleMatrix(lup.getRowPivot(null))) }
}
else -> null
}?.let{type.cast(it)}
}?.let { type.cast(it) }
public override operator fun get(i: Int, j: Int): Double = origin[i, j]
override fun equals(other: Any?): Boolean {
if (this === other) return true
if (other !is Matrix<*>) return false
return NDStructure.contentEquals(this, other)
}
override fun hashCode(): Int = origin.hashCode()
}