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updated example code for BAEL-1425 (#4424)

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Seun Matt 2018-06-08 08:05:37 +01:00 committed by maibin
parent 0a3d212a2a
commit 749611e314
1 changed files with 18 additions and 16 deletions
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26
libraries/src/main/java/com/baeldung/commons/math3/Histogram.java
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@ -47,26 +47,28 @@ public class Histogram {
private Map processRawData() { private Map processRawData() {
List<Integer> datasetList = Arrays.asList(36, 25, 38, 46, 55, 68, 72, 55, 36, 38, 67, 45, 22, 48, 91, 46, 52, 61, 58, 55); List<Integer> datasetList = Arrays.asList(
36, 25, 38, 46, 55, 68, 72,
55, 36, 38, 67, 45, 22, 48,
91, 46, 52, 61, 58, 55);
Frequency frequency = new Frequency(); Frequency frequency = new Frequency();
datasetList.forEach(d -> frequency.addValue(Double.parseDouble(d.toString()))); datasetList.forEach(d -> frequency.addValue(Double.parseDouble(d.toString())));
List processed = new ArrayList(); datasetList.stream()
datasetList.forEach(d -> { .map(d -> Double.parseDouble(d.toString()))
double observation = Double.parseDouble(d.toString()); .distinct()
.forEach(observation -> {
if(processed.contains(observation))
return;
long observationFrequency = frequency.getCount(observation); long observationFrequency = frequency.getCount(observation);
int upperBoundary = (observation > classWidth) ? Math.multiplyExact( (int) Math.ceil(observation / classWidth), classWidth) : classWidth; int upperBoundary = (observation > classWidth)
int lowerBoundary = (upperBoundary > classWidth) ? Math.subtractExact(upperBoundary, classWidth) : 0; ? Math.multiplyExact( (int) Math.ceil(observation / classWidth), classWidth)
: classWidth;
int lowerBoundary = (upperBoundary > classWidth)
? Math.subtractExact(upperBoundary, classWidth)
: 0;
String bin = lowerBoundary + "-" + upperBoundary; String bin = lowerBoundary + "-" + upperBoundary;
updateDistributionMap(lowerBoundary, bin, observationFrequency); updateDistributionMap(lowerBoundary, bin, observationFrequency);
processed.add(observation);
}); });
return distributionMap; return distributionMap;