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+/*%0A * Zorbage: an algebraic data hierarchy for use in numeric processing.%0A *%0A * Copyright (C) 2016-2017 Barry DeZonia%0A * %0A * Redistribution and use in source and binary forms, with or without%0A * modification, are permitted provided that the following conditions are met:%0A * %0A * 1. Redistributions of source code must retain the above copyright notice,%0A *    this list of conditions and the following disclaimer.%0A * 2. Redistributions in binary form must reproduce the above copyright notice,%0A *    this list of conditions and the following disclaimer in the documentation%0A *    and/or other materials provided with the distribution.%0A * %0A * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS %22AS IS%22%0A * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE%0A * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE%0A * ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDERS OR CONTRIBUTORS BE%0A * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR%0A * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF%0A * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS%0A * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN%0A * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)%0A * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE%0A * POSSIBILITY OF SUCH DAMAGE.%0A */%0Apackage zorbage.type.operation;%0A%0Aimport zorbage.type.algebra.AdditiveGroup;%0Aimport zorbage.type.algebra.Invertible;%0Aimport zorbage.type.algebra.Multiplication;%0Aimport zorbage.type.algebra.Unity;%0Aimport zorbage.type.storage.Storage;%0A%0A// TODO Make a std dev class that is sqrt of variance%0A%0A/**%0A * %0A * @author Barry DeZonia%0A *%0A */%0Apublic class Variance%3CT extends AdditiveGroup%3CT,U%3E & Multiplication%3CU%3E & Unity%3CU%3E & Invertible%3CU%3E, U%3E %7B%0A%0A%09private T g;%0A%09%0A%09public Variance(T g) %7B%0A%09%09this.g = g;%0A%09%7D%0A%09%0A%09public void calculate(Storage%3C?,U%3E storage, U result) %7B%0A%09%09U avg = g.construct();%0A%09%09U sum = g.construct();%0A%09%09U tmp = g.construct();%0A%09%09U count = g.construct();%0A%09%09U one = g.construct();%0A%09%09g.unity(one);%0A%09%09g.subtract(count, one, count);%0A%09%09Average%3CT, U%3E mean = new Average%3CT,U%3E(g);%0A%09%09mean.calculate(storage, avg);%0A%09%09for (long i = 0; i %3C storage.size(); i++) %7B%0A%09%09%09storage.get(i, tmp);%0A%09%09%09g.subtract(tmp, avg, tmp);%0A%09%09%09g.multiply(tmp, tmp, tmp);%0A%09%09%09g.add(sum, tmp, sum);%0A%09%09%09g.add(count, one, count);%0A%09%09%7D%0A%09%09g.divide(sum, count, result);%0A%09%7D%0A%7D%0A

Define a variance operation