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Refactor series naming and docs

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This commit is contained in:
Alexander Nozik 2023-03-10 21:40:14 +03:00
parent db61f71440
commit a3963ac4f5
2 changed files with 62 additions and 49 deletions
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79
kmath-stat/src/commonMain/kotlin/space/kscience/kmath/series/SeriesAlgebra.kt
View File

@ -6,6 +6,7 @@ import space.kscience.kmath.operations.RingOps
import space.kscience.kmath.stat.StatisticalAlgebra
import space.kscience.kmath.structures.Buffer
import space.kscience.kmath.structures.BufferView
import space.kscience.kmath.structures.getOrNull
import kotlin.math.max
import kotlin.math.min
@ -33,8 +34,6 @@ public interface Series<T> : Buffer<T> {
public val position: Int
}
public val <T> Series<T>.absoluteIndices: IntRange get() = position until position + size
/**
* A [BufferView] with index offset (both positive and negative) and possible size change
*/
@ -60,54 +59,68 @@ public class SeriesAlgebra<T, out A : Ring<T>, out BA : BufferAlgebra<T, A>, L>(
private val labelResolver: (Int) -> L,
) : RingOps<Buffer<T>>, StatisticalAlgebra<T, A, BA> {
public val Buffer<T>.indices: IntRange
/**
* A range of valid offset indices. In general, does not start with zero.
*/
public val Buffer<T>.offsetIndices: IntRange
get() = if (this is Series) {
absoluteIndices
position until position + size
} else {
0 until size
}
/**
* Get the value by absolute index in the series algebra or return null if index is out of range
* Get the value by absolute offset in the series algebra or return null if index is out of range
*/
public fun Buffer<T>.getAbsoluteOrNull(index: Int): T? = when {
index !in indices -> null
this is Series -> origin[index - position]
else -> get(index)
public fun Buffer<T>.getByOffsetOrNull(index: Int): T? = when {
index !in offsetIndices -> null
this is Series -> origin.getOrNull(index - position)
else -> getOrNull(index)
}
/**
* Get the value by absolute index in the series algebra or throw [IndexOutOfBoundsException] if index is out of range
*/
public fun Buffer<T>.getAbsolute(index: Int): T =
getAbsoluteOrNull(index) ?: throw IndexOutOfBoundsException("Index $index is not in $indices")
public fun Buffer<T>.getByOffset(index: Int): T =
getByOffsetOrNull(index) ?: throw IndexOutOfBoundsException("Index $index is not in $offsetIndices")
/**
* Create an offset series with index starting point at [index]
* Zero-copy move [Buffer] or [Series] to given [position] ignoring series offset if it is present.
*/
public fun Buffer<T>.moveTo(index: Int): Series<T> = if (this is Series) {
SeriesImpl(origin, index, size)
public fun Buffer<T>.moveTo(position: Int): Series<T> = if (this is Series) {
SeriesImpl(origin, position, size)
} else {
SeriesImpl(this, index, size)
SeriesImpl(this, position, size)
}
public val Buffer<T>.offset: Int get() = if (this is Series) position else 0
/**
* Zero-copy move [Buffer] or [Series] by given [offset]. If it is [Series], sum intrinsic series position and the [offset].
*/
public fun Buffer<T>.moveBy(offset: Int): Series<T> = if (this is Series) {
SeriesImpl(origin, position + offset, size)
} else {
SeriesImpl(this, offset, size)
}
/**
* Build a new series
* An offset of the buffer start relative to [SeriesAlgebra] zero offset
*/
public fun series(size: Int, fromIndex: Int = 0, block: A.(label: L) -> T): Series<T> {
public val Buffer<T>.startOffset: Int get() = if (this is Series) position else 0
/**
* Build a new series positioned at [startOffset].
*/
public fun series(size: Int, startOffset: Int = 0, block: A.(label: L) -> T): Series<T> {
return elementAlgebra.bufferFactory(size) {
val index = it + fromIndex
val index = it + startOffset
elementAlgebra.block(labelResolver(index))
}.moveTo(fromIndex)
}.moveTo(startOffset)
}
/**
* Get a label buffer for given buffer.
*/
public val Buffer<T>.labels: List<L> get() = indices.map(labelResolver)
public val Buffer<T>.labels: List<L> get() = offsetIndices.map(labelResolver)
/**
* Try to resolve element by label and return null if element with a given label is not found
@ -115,7 +128,7 @@ public class SeriesAlgebra<T, out A : Ring<T>, out BA : BufferAlgebra<T, A>, L>(
public operator fun Buffer<T>.get(label: L): T? {
val index = labels.indexOf(label)
if (index == -1) return null
return getAbsolute(index + offset)
return getByOffset(index + startOffset)
}
/**
@ -123,9 +136,9 @@ public class SeriesAlgebra<T, out A : Ring<T>, out BA : BufferAlgebra<T, A>, L>(
*/
public inline fun Buffer<T>.map(crossinline transform: A.(T) -> T): Series<T> {
val buf = elementAlgebra.bufferFactory(size) {
elementAlgebra.transform(getAbsolute(it))
elementAlgebra.transform(getByOffset(it))
}
return buf.moveTo(indices.first)
return buf.moveTo(offsetIndices.first)
}
/**
@ -134,22 +147,22 @@ public class SeriesAlgebra<T, out A : Ring<T>, out BA : BufferAlgebra<T, A>, L>(
public inline fun Buffer<T>.mapWithLabel(crossinline transform: A.(arg: T, label: L) -> T): Series<T> {
val labels = labels
val buf = elementAlgebra.bufferFactory(size) {
elementAlgebra.transform(getAbsolute(it), labels[it])
elementAlgebra.transform(getByOffset(it), labels[it])
}
return buf.moveTo(indices.first)
return buf.moveTo(offsetIndices.first)
}
public inline fun <R> Buffer<T>.fold(initial: R, operation: A.(acc: R, T) -> R): R {
var accumulator = initial
for (index in this.indices) accumulator = elementAlgebra.operation(accumulator, getAbsolute(index))
for (index in this.offsetIndices) accumulator = elementAlgebra.operation(accumulator, getByOffset(index))
return accumulator
}
public inline fun <R> Buffer<T>.foldWithLabel(initial: R, operation: A.(acc: R, arg: T, label: L) -> R): R {
val labels = labels
var accumulator = initial
for (index in this.indices) accumulator =
elementAlgebra.operation(accumulator, getAbsolute(index), labels[index])
for (index in this.offsetIndices) accumulator =
elementAlgebra.operation(accumulator, getByOffset(index), labels[index])
return accumulator
}
@ -160,11 +173,11 @@ public class SeriesAlgebra<T, out A : Ring<T>, out BA : BufferAlgebra<T, A>, L>(
other: Buffer<T>,
crossinline operation: A.(left: T, right: T) -> T,
): Series<T> {
val newRange = indices.intersect(other.indices)
val newRange = offsetIndices.intersect(other.offsetIndices)
return elementAlgebra.bufferFactory(newRange.size) {
elementAlgebra.operation(
getAbsolute(it),
other.getAbsolute(it)
getByOffset(it),
other.getByOffset(it)
)
}.moveTo(newRange.first)
}

32
kmath-stat/src/commonMain/kotlin/space/kscience/kmath/series/seriesExtensions.kt
View File

@ -12,32 +12,32 @@ import space.kscience.kmath.structures.Buffer
public fun <T, BA> SeriesAlgebra<T, *, BA, *>.sin(
arg: Buffer<T>,
): Series<T> where BA : BufferAlgebra<T, *>, BA : TrigonometricOperations<Buffer<T>> =
bufferAlgebra.sin(arg).moveTo(arg.offset)
bufferAlgebra.sin(arg).moveTo(arg.startOffset)
public fun <T, BA> SeriesAlgebra<T, *, BA, *>.cos(
arg: Buffer<T>,
): Series<T> where BA : BufferAlgebra<T, *>, BA : TrigonometricOperations<Buffer<T>> =
bufferAlgebra.cos(arg).moveTo(arg.offset)
bufferAlgebra.cos(arg).moveTo(arg.startOffset)
public fun <T, BA> SeriesAlgebra<T, *, BA, *>.tan(
arg: Buffer<T>,
): Series<T> where BA : BufferAlgebra<T, *>, BA : TrigonometricOperations<Buffer<T>> =
bufferAlgebra.tan(arg).moveTo(arg.offset)
bufferAlgebra.tan(arg).moveTo(arg.startOffset)
public fun <T, BA> SeriesAlgebra<T, *, BA, *>.asin(
arg: Buffer<T>,
): Series<T> where BA : BufferAlgebra<T, *>, BA : TrigonometricOperations<Buffer<T>> =
bufferAlgebra.asin(arg).moveTo(arg.offset)
bufferAlgebra.asin(arg).moveTo(arg.startOffset)
public fun <T, BA> SeriesAlgebra<T, *, BA, *>.acos(
arg: Buffer<T>,
): Series<T> where BA : BufferAlgebra<T, *>, BA : TrigonometricOperations<Buffer<T>> =
bufferAlgebra.acos(arg).moveTo(arg.offset)
bufferAlgebra.acos(arg).moveTo(arg.startOffset)
public fun <T, BA> SeriesAlgebra<T, *, BA, *>.atan(
arg: Buffer<T>,
): Series<T> where BA : BufferAlgebra<T, *>, BA : TrigonometricOperations<Buffer<T>> =
bufferAlgebra.atan(arg).moveTo(arg.offset)
bufferAlgebra.atan(arg).moveTo(arg.startOffset)
//exponential
@ -45,42 +45,42 @@ public fun <T, BA> SeriesAlgebra<T, *, BA, *>.atan(
public fun <T, BA> SeriesAlgebra<T, *, BA, *>.exp(
arg: Buffer<T>,
): Series<T> where BA : BufferAlgebra<T, *>, BA : ExponentialOperations<Buffer<T>> =
bufferAlgebra.exp(arg).moveTo(arg.offset)
bufferAlgebra.exp(arg).moveTo(arg.startOffset)
public fun <T, BA> SeriesAlgebra<T, *, BA, *>.ln(
arg: Buffer<T>,
): Series<T> where BA : BufferAlgebra<T, *>, BA : ExponentialOperations<Buffer<T>> =
bufferAlgebra.ln(arg).moveTo(arg.offset)
bufferAlgebra.ln(arg).moveTo(arg.startOffset)
public fun <T, BA> SeriesAlgebra<T, *, BA, *>.sinh(
arg: Buffer<T>,
): Series<T> where BA : BufferAlgebra<T, *>, BA : ExponentialOperations<Buffer<T>> =
bufferAlgebra.sinh(arg).moveTo(arg.offset)
bufferAlgebra.sinh(arg).moveTo(arg.startOffset)
public fun <T, BA> SeriesAlgebra<T, *, BA, *>.cosh(
arg: Buffer<T>,
): Series<T> where BA : BufferAlgebra<T, *>, BA : ExponentialOperations<Buffer<T>> =
bufferAlgebra.cosh(arg).moveTo(arg.offset)
bufferAlgebra.cosh(arg).moveTo(arg.startOffset)
public fun <T, BA> SeriesAlgebra<T, *, BA, *>.tanh(
arg: Buffer<T>,
): Series<T> where BA : BufferAlgebra<T, *>, BA : ExponentialOperations<Buffer<T>> =
bufferAlgebra.tanh(arg).moveTo(arg.offset)
bufferAlgebra.tanh(arg).moveTo(arg.startOffset)
public fun <T, BA> SeriesAlgebra<T, *, BA, *>.asinh(
arg: Buffer<T>,
): Series<T> where BA : BufferAlgebra<T, *>, BA : ExponentialOperations<Buffer<T>> =
bufferAlgebra.asinh(arg).moveTo(arg.offset)
bufferAlgebra.asinh(arg).moveTo(arg.startOffset)
public fun <T, BA> SeriesAlgebra<T, *, BA, *>.acosh(
arg: Buffer<T>,
): Series<T> where BA : BufferAlgebra<T, *>, BA : ExponentialOperations<Buffer<T>> =
bufferAlgebra.acosh(arg).moveTo(arg.offset)
bufferAlgebra.acosh(arg).moveTo(arg.startOffset)
public fun <T, BA> SeriesAlgebra<T, *, BA, *>.atanh(
arg: Buffer<T>,
): Series<T> where BA : BufferAlgebra<T, *>, BA : ExponentialOperations<Buffer<T>> =
bufferAlgebra.atanh(arg).moveTo(arg.offset)
bufferAlgebra.atanh(arg).moveTo(arg.startOffset)
//power
@ -89,9 +89,9 @@ public fun <T, BA> SeriesAlgebra<T, *, BA, *>.power(
arg: Buffer<T>,
pow: Number,
): Series<T> where BA : BufferAlgebra<T, *>, BA : PowerOperations<Buffer<T>> =
bufferAlgebra.power(arg, pow).moveTo(arg.offset)
bufferAlgebra.power(arg, pow).moveTo(arg.startOffset)
public fun <T, BA> SeriesAlgebra<T, *, BA, *>.sqrt(
arg: Buffer<T>,
): Series<T> where BA : BufferAlgebra<T, *>, BA : PowerOperations<Buffer<T>> =
bufferAlgebra.sqrt(arg).moveTo(arg.offset)
bufferAlgebra.sqrt(arg).moveTo(arg.startOffset)