36 lines
1.3 KiB
Kotlin
36 lines
1.3 KiB
Kotlin
// version 1.2.21
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fun median(x: DoubleArray, start: Int, endInclusive: Int): Double {
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val size = endInclusive - start + 1
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require (size > 0) { "Array slice cannot be empty" }
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val m = start + size / 2
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return if (size % 2 == 1) x[m] else (x[m - 1] + x[m]) / 2.0
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}
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fun fivenum(x: DoubleArray): DoubleArray {
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require(x.none { it.isNaN() }) { "Unable to deal with arrays containing NaN" }
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val result = DoubleArray(5)
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x.sort()
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result[0] = x[0]
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result[2] = median(x, 0, x.size - 1)
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result[4] = x[x.lastIndex]
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val m = x.size / 2
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var lowerEnd = if (x.size % 2 == 1) m else m - 1
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result[1] = median(x, 0, lowerEnd)
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result[3] = median(x, m, x.size - 1)
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return result
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}
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fun main(args: Array<String>) {
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var xl = listOf(
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doubleArrayOf(15.0, 6.0, 42.0, 41.0, 7.0, 36.0, 49.0, 40.0, 39.0, 47.0, 43.0),
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doubleArrayOf(36.0, 40.0, 7.0, 39.0, 41.0, 15.0),
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doubleArrayOf(
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0.14082834, 0.09748790, 1.73131507, 0.87636009, -1.95059594, 0.73438555,
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-0.03035726, 1.46675970, -0.74621349, -0.72588772, 0.63905160, 0.61501527,
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-0.98983780, -1.00447874, -0.62759469, 0.66206163, 1.04312009, -0.10305385,
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0.75775634, 0.32566578
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)
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)
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xl.forEach { println("${fivenum(it).asList()}\n") }
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}
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