I was trying to run the first example given in this page:
http://commons.apache.org/math/userguide/stat.html My program is as
follows:
import org.apache.commons.math.stat.descriptive.DescriptiveStatistics;
public class DescStats
{
public static void main(String[] args)
{
System.out.println("hello, world");
DescriptiveStatistics stats = DescriptiveStatistics.newInstance();
int inputArray[] = new int[] {5, 7, 1, 3, 8};
for (int i = 0; i < inputArray.length; i++) {
stats.addValue(inputArray[i]);
}
double mean = stats.getMean();
double std = stats.getStandardDeviation();
double median = stats.getMedian();
System.out.println("mean: " + mean);
System.out.println("std: " + std);
System.out.println("median: " + median);
}
}
I get this error on trying to compile:
DescStats.java:9: cannot find symbol
symbol : method newInstance()
location: class org.apache.commons.math.stat.descriptive.DescriptiveStatistics
DescriptiveStatistics stats = DescriptiveStatistics.newInstance();
^
DescStats.java:18: cannot find symbol
symbol : method getMedian()
location: class org.apache.commons.math.stat.descriptive.DescriptiveStatistics
double median = stats.getMedian();
I checked the apidocs at
http://commons.apache.org/math/apidocs/org/apache/commons/math/stat/descriptive/DescriptiveStatistics.html
and found that newInstance() and getMedian() methods are not present.
Is the tutorial very old and out of sync with the latest Commons Math?
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