1 files changed, 60 insertions, 0 deletions
diff --git a/src/main/java/org/apache/commons/math3/analysis/interpolation/NevilleInterpolator.java b/src/main/java/org/apache/commons/math3/analysis/interpolation/NevilleInterpolator.java
new file mode 100644
index 0000000..6b47451
--- /dev/null
+++ b/src/main/java/org/apache/commons/math3/analysis/interpolation/NevilleInterpolator.java
@@ -0,0 +1,60 @@
+/*
+ * Licensed to the Apache Software Foundation (ASF) under one or more
+ * contributor license agreements.  See the NOTICE file distributed with
+ * this work for additional information regarding copyright ownership.
+ * The ASF licenses this file to You under the Apache License, Version 2.0
+ * (the "License"); you may not use this file except in compliance with
+ * the License.  You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+package org.apache.commons.math3.analysis.interpolation;
+
+import java.io.Serializable;
+
+import org.apache.commons.math3.analysis.polynomials.PolynomialFunctionLagrangeForm;
+import org.apache.commons.math3.exception.DimensionMismatchException;
+import org.apache.commons.math3.exception.NumberIsTooSmallException;
+import org.apache.commons.math3.exception.NonMonotonicSequenceException;
+
+/**
+ * Implements the <a href="http://mathworld.wolfram.com/NevillesAlgorithm.html">
+ * Neville's Algorithm</a> for interpolation of real univariate functions. For
+ * reference, see <b>Introduction to Numerical Analysis</b>, ISBN 038795452X,
+ * chapter 2.
+ * <p>
+ * The actual code of Neville's algorithm is in PolynomialFunctionLagrangeForm,
+ * this class provides an easy-to-use interface to it.</p>
+ *
+ * @since 1.2
+ */
+public class NevilleInterpolator implements UnivariateInterpolator,
+    Serializable {
+
+    /** serializable version identifier */
+    static final long serialVersionUID = 3003707660147873733L;
+
+    /**
+     * Computes an interpolating function for the data set.
+     *
+     * @param x Interpolating points.
+     * @param y Interpolating values.
+     * @return a function which interpolates the data set
+     * @throws DimensionMismatchException if the array lengths are different.
+     * @throws NumberIsTooSmallException if the number of points is less than 2.
+     * @throws NonMonotonicSequenceException if two abscissae have the same
+     * value.
+     */
+    public PolynomialFunctionLagrangeForm interpolate(double x[], double y[])
+        throws DimensionMismatchException,
+               NumberIsTooSmallException,
+               NonMonotonicSequenceException {
+        return new PolynomialFunctionLagrangeForm(x, y);
+    }
+}