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forgot ln

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This commit is contained in:
Roland Grinis 2021-03-30 19:31:42 +01:00
parent b5d3ca76db
commit 07b6f988c2
1 changed files with 1 additions and 1 deletions
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kmath-core/src/commonMain/kotlin/space/kscience/kmath/tensors/core/utils.kt
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@ -38,5 +38,5 @@ internal fun Buffer<Double>.array(): DoubleArray = when (this) {
internal inline fun getRandomNormals(n: Int, seed: Long): DoubleArray {
val u = Random(seed)
return (0 until n).map { sqrt(-2.0 * u.nextDouble()) * cos(2.0 * PI * u.nextDouble()) }.toDoubleArray()
return (0 until n).map { sqrt(-2.0 * ln(u.nextDouble())) * cos(2.0 * PI * u.nextDouble()) }.toDoubleArray()
}