Reorder density method in ContinuousDistribution
Density is the equivalent method to probability in the
DiscreteDistribution interface, so the order is now consistent.
diff --git a/commons-statistics-distribution/src/main/java/org/apache/commons/statistics/distribution/ContinuousDistribution.java b/commons-statistics-distribution/src/main/java/org/apache/commons/statistics/distribution/ContinuousDistribution.java
index 2b963d8..ec9493b 100644
--- a/commons-statistics-distribution/src/main/java/org/apache/commons/statistics/distribution/ContinuousDistribution.java
+++ b/commons-statistics-distribution/src/main/java/org/apache/commons/statistics/distribution/ContinuousDistribution.java
@@ -23,6 +23,20 @@
*/
public interface ContinuousDistribution {
/**
+ * Returns the probability density function (PDF) of this distribution
+ * evaluated at the specified point {@code x}.
+ * In general, the PDF is the derivative of the {@link #cumulativeProbability(double) CDF}.
+ * If the derivative does not exist at {@code x}, then an appropriate
+ * replacement should be returned, e.g. {@code Double.POSITIVE_INFINITY},
+ * {@code Double.NaN}, or the limit inferior or limit superior of the
+ * difference quotient.
+ *
+ * @param x Point at which the PDF is evaluated.
+ * @return the value of the probability density function at {@code x}.
+ */
+ double density(double x);
+
+ /**
* For a random variable {@code X} whose values are distributed according
* to this distribution, this method returns {@code P(x0 < X <= x1)}.
* The default implementation uses the identity
@@ -44,20 +58,6 @@
}
/**
- * Returns the probability density function (PDF) of this distribution
- * evaluated at the specified point {@code x}.
- * In general, the PDF is the derivative of the {@link #cumulativeProbability(double) CDF}.
- * If the derivative does not exist at {@code x}, then an appropriate
- * replacement should be returned, e.g. {@code Double.POSITIVE_INFINITY},
- * {@code Double.NaN}, or the limit inferior or limit superior of the
- * difference quotient.
- *
- * @param x Point at which the PDF is evaluated.
- * @return the value of the probability density function at {@code x}.
- */
- double density(double x);
-
- /**
* Returns the natural logarithm of the probability density function
* (PDF) of this distribution evaluated at the specified point {@code x}.
*
