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Added toString() override to StatistictalSummaryValues. JIRA: MATH-420. 

git-svn-id: https://svn.apache.org/repos/asf/commons/proper/math/branches/MATH_2_X@1038873 13f79535-47bb-0310-9956-ffa450edef68
This commit is contained in:
Phil Steitz 2010-11-24 23:35:13 +00:00
parent 3d93dbf5ce
commit bf98dae677
2 changed files with 39 additions and 0 deletions
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22
src/main/java/org/apache/commons/math/stat/descriptive/StatisticalSummaryValues.java
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@ -160,5 +160,27 @@ public class StatisticalSummaryValues implements Serializable,
result = result * 31 + MathUtils.hash(getVariance());
return result;
}
/**
* Generates a text report displaying values of statistics.
* Each statistic is displayed on a separate line.
*
* @return String with line feeds displaying statistics
*/
@Override
public String toString() {
StringBuffer outBuffer = new StringBuffer();
String endl = "\n";
outBuffer.append("StatisticalSummaryValues:").append(endl);
outBuffer.append("n: ").append(getN()).append(endl);
outBuffer.append("min: ").append(getMin()).append(endl);
outBuffer.append("max: ").append(getMax()).append(endl);
outBuffer.append("mean: ").append(getMean()).append(endl);
outBuffer.append("std dev: ").append(getStandardDeviation())
.append(endl);
outBuffer.append("variance: ").append(getVariance()).append(endl);
outBuffer.append("sum: ").append(getSum()).append(endl);
return outBuffer.toString();
}
}

17
src/test/java/org/apache/commons/math/stat/descriptive/StatisticalSummaryValuesTest.java
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@ -17,6 +17,8 @@
package org.apache.commons.math.stat.descriptive;
import java.util.Locale;
import junit.framework.TestCase;
import org.apache.commons.math.TestUtils;
@ -65,4 +67,19 @@ public final class StatisticalSummaryValuesTest extends TestCase {
TestUtils.assertEquals("min",s.getMin(),u.getMin(), 0);
TestUtils.assertEquals("max",s.getMax(),u.getMax(), 0);
}
public void testToString() {
StatisticalSummaryValues u = new StatisticalSummaryValues(4.5, 16, 10, 5, 4, 45);
Locale d = Locale.getDefault();
Locale.setDefault(Locale.US);
assertEquals("StatisticalSummaryValues:\n" +
"n: 10\n" +
"min: 4.0\n" +
"max: 5.0\n" +
"mean: 4.5\n" +
"std dev: 4.0\n" +
"variance: 16.0\n" +
"sum: 45.0\n", u.toString());
Locale.setDefault(d);
}
}