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started TimeSeriesAlgebra

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mrFendel 2023-04-06 17:58:29 +03:00
parent 1d7f4ed538
commit ba26c7020e
2 changed files with 37 additions and 11 deletions
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11
kmath-stat/src/commonMain/kotlin/space/kscience/kmath/series/SeriesAlgebra.kt
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@ -155,17 +155,6 @@ public class SeriesAlgebra<T, out A : Ring<T>, out BA : BufferAlgebra<T, A>, L>(
return accumulator
}
// TODO: add fold with recorded accumulation
// public inline fun <R> Buffer<T>.traceFold(initial: R, operation: A.(acc: R, T) -> R): Buffer<R> {
// var tempBuffer = elementAlgebra.bufferFactory(this.size) {i -> getAbsolute(i)}
// var accumulator = initial
// for (index in this.indices) {
// accumulator = elementAlgebra.operation(accumulator, getAbsolute(index))
// tempBuffer.set(index, accumulator)
// }
// return elementAlgebra.bufferFactory(this.size) {i -> tempBuffer.getAbsolute(i)}
// }
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

37
kmath-stat/src/commonMain/kotlin/space/kscience/kmath/series/TimeSeriesAlgebra.kt Normal file
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@ -0,0 +1,37 @@
/*
* Copyright 2018-2023 KMath contributors.
* Use of this source code is governed by the Apache 2.0 license that can be found in the license/LICENSE.txt file.
*/
package space.kscience.kmath.series
import space.kscience.kmath.structures.Buffer
public interface TimeSeries<R, T>: Series<R> {
public override val origin: Buffer<R>
public override val position: Int
// TODO: Specify the types of DateTime that can be contained in timeStamp Buffer
public val timeStamp: Buffer<T> // Buffer of some datetime instances like: Instant, LocalDate, LocalTime...
}
private class TimeSeriesImpl<R, T>(
override val origin: Buffer<R>,
override val timeStamp: Buffer<T>,
override val position: Int,
override val size: Int = origin.size,
) : TimeSeries<R, T> by origin { // TODO: manage with delegation
init {
require(size > 0) { "Size must be positive" }
require(size <= origin.size) { "Slice size is larger than the original buffer" }
require(size <= timeStamp.size) { "Slice size is larger than the timeStamp buffer" }
}
// override fun toString(): String = "$origin-->${position}"
}
// TODO: add conversion to Buffer of Pairs ?