43 lines
1.6 KiB
Java
43 lines
1.6 KiB
Java
import java.util.Arrays;
|
|
|
|
public class Fivenum {
|
|
|
|
static double median(double[] x, int start, int endInclusive) {
|
|
int size = endInclusive - start + 1;
|
|
if (size <= 0) throw new IllegalArgumentException("Array slice cannot be empty");
|
|
int m = start + size / 2;
|
|
return (size % 2 == 1) ? x[m] : (x[m - 1] + x[m]) / 2.0;
|
|
}
|
|
|
|
static double[] fivenum(double[] x) {
|
|
for (Double d : x) {
|
|
if (d.isNaN())
|
|
throw new IllegalArgumentException("Unable to deal with arrays containing NaN");
|
|
}
|
|
double[] result = new double[5];
|
|
Arrays.sort(x);
|
|
result[0] = x[0];
|
|
result[2] = median(x, 0, x.length - 1);
|
|
result[4] = x[x.length - 1];
|
|
int m = x.length / 2;
|
|
int lowerEnd = (x.length % 2 == 1) ? m : m - 1;
|
|
result[1] = median(x, 0, lowerEnd);
|
|
result[3] = median(x, m, x.length - 1);
|
|
return result;
|
|
}
|
|
|
|
public static void main(String[] args) {
|
|
double xl[][] = {
|
|
{15.0, 6.0, 42.0, 41.0, 7.0, 36.0, 49.0, 40.0, 39.0, 47.0, 43.0},
|
|
{36.0, 40.0, 7.0, 39.0, 41.0, 15.0},
|
|
{
|
|
0.14082834, 0.09748790, 1.73131507, 0.87636009, -1.95059594, 0.73438555,
|
|
-0.03035726, 1.46675970, -0.74621349, -0.72588772, 0.63905160, 0.61501527,
|
|
-0.98983780, -1.00447874, -0.62759469, 0.66206163, 1.04312009, -0.10305385,
|
|
0.75775634, 0.32566578
|
|
}
|
|
};
|
|
for (double[] x : xl) System.out.printf("%s\n\n", Arrays.toString(fivenum(x)));
|
|
}
|
|
}
|