kscience/kmath
9
0
Fork 1
Code Issues Pull Requests 6 Packages Projects Releases 16 Wiki Activity

WIP: feature/emd #521

Draft
teldufalsari wants to merge 11 commits from teldufalsari/kmath:feature/emd into dev
pull from: teldufalsari/kmath:feature/emd
merge into: kscience:dev
Conversation 1 Commits 11 Files Changed 8 +4 -12
1 changed files with 4 additions and 12 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files
Showing only changes of commit 40ffa8d6fc - Show all commits

16
kmath-stat/src/commonMain/kotlin/space/kscience/kmath/series/EmpiricalModeDecomposition.kt
View File

@ -76,17 +76,7 @@ public class EmpiricalModeDecomposition<BA, L: Number> (
* @return [SiftingResult.NotEnoughExtrema] is returned if the signal has too few extrema to extract a mode.
* Success of an appropriate type (See [SiftingResult.Success] class) is returned otherwise.
*/
private fun sift(signal: Series<Double>): SiftingResult = (seriesAlgebra) {
val mean = findMean(signal) ?: return SiftingResult.NotEnoughExtrema
val protoMode = signal.zip(mean) { s, m -> s - m }
val sNumber = if (protoMode.sCondition()) 1 else 0
return when {
maxSiftIterations == 1 -> SiftingResult.MaxIterationsReached(protoMode)
sNumber >= sConditionThreshold -> SiftingResult.SNumberReached(protoMode)
relativeDifference(protoMode, signal) < siftingDelta * signal.size -> SiftingResult.DeltaReached(protoMode)
else -> siftInner(protoMode, 2, sNumber)
}
}
private fun sift(signal: Series<Double>): SiftingResult = siftInner(signal, 1, 0)
/**
* Compute a single iteration of the sifting process.
@ -96,7 +86,9 @@ public class EmpiricalModeDecomposition<BA, L: Number> (
iterationNumber: Int,
sNumber: Int
): SiftingResult = (seriesAlgebra) {
val mean = findMean(prevMode) ?: return SiftingResult.SignalFlattened(prevMode)
val mean = findMean(prevMode) ?:
return if (iterationNumber == 1) SiftingResult.NotEnoughExtrema
else SiftingResult.SignalFlattened(prevMode)
val mode = prevMode.zip(mean) { p, m -> p - m }
val newSNumber = if (mode.sCondition()) sNumber + 1 else sNumber
return when {