added createRealVector for consistency with Matrix factory methods

git-svn-id: https://svn.apache.org/repos/asf/commons/proper/math/branches/MATH_2_0@682190 13f79535-47bb-0310-9956-ffa450edef68

src/java/org/apache/commons/math/linear/MatrixUtils.java

@@ -147,6 +147,18 @@ public class MatrixUtils {
         return new BigMatrixImpl(data);
     }
     
+    /**
+     * Creates a {@link RealVector} using the data from the input array. 
+     * 
+     * @param data the input data
+     * @return a data.length RealVector
+     * @throws IllegalArgumentException if <code>data</code> is empty
+     * @throws NullPointerException if <code>data</code>is null
+     */
+    public static RealVector createRealVector(double[] data) {
+        return new RealVectorImpl(data, true);
+    }
+    
     /**
      * Creates a row {@link RealMatrix} using the data from the input
      * array.