44 lines
1.7 KiB
Java
44 lines
1.7 KiB
Java
/* ====================================================================
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Licensed to the Apache Software Foundation (ASF) under one or more
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contributor license agreements. See the NOTICE file distributed with
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this work for additional information regarding copyright ownership.
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The ASF licenses this file to You under the Apache License, Version 2.0
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(the "License"); you may not use this file except in compliance with
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the License. You may obtain a copy of the License at
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http://www.apache.org/licenses/LICENSE-2.0
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Unless required by applicable law or agreed to in writing, software
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distributed under the License is distributed on an "AS IS" BASIS,
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WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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See the License for the specific language governing permissions and
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limitations under the License.
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==================================================================== */
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package org.apache.poi.hssf.record.formula.functions;
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/**
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* Implementation of Excel function SUMX2MY2()<p/>
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*
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* Calculates the sum of differences of squares in two arrays of the same size.<br/>
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* <b>Syntax</b>:<br/>
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* <b>SUMX2MY2</b>(<b>arrayX</b>, <b>arrayY</b>)<p/>
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*
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* result = Σ<sub>i: 0..n</sub>(x<sub>i</sub><sup>2</sup>-y<sub>i</sub><sup>2</sup>)
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*
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* @author Amol S. Deshmukh < amolweb at ya hoo dot com >
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*/
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public final class Sumx2my2 extends XYNumericFunction {
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private static final Accumulator XSquaredMinusYSquaredAccumulator = new Accumulator() {
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public double accumulate(double x, double y) {
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return x * x - y * y;
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}
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};
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protected Accumulator createAccumulator() {
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return XSquaredMinusYSquaredAccumulator;
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}
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}
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