Mega Code Archive
Calculate the minimum and maximum values out of a list of doubles
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/**
* Copyright (C) 2009, 2010 SC 4ViewSoft SRL
*
* Licensed 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.achartengine.util;
import java.text.NumberFormat;
import java.text.ParseException;
import java.util.ArrayList;
import java.util.List;
/**
* Utility class for math operations.
*/
class MathHelper {
/** A value that is used a null value. */
public static final double NULL_VALUE = Double.MAX_VALUE;
/**
* A number formatter to be used to make sure we have a maximum number of
* fraction digits in the labels.
*/
private static final NumberFormat FORMAT = NumberFormat.getNumberInstance();
private MathHelper() {
// empty constructor
}
/**
* Calculate the minimum and maximum values out of a list of doubles.
*
* @param values the input values
* @return an array with the minimum and maximum values
*/
public static double[] minmax(List<Double> values) {
if (values.size() == 0) {
return new double[2];
}
double min = values.get(0);
double max = min;
int length = values.size();
for (int i = 1; i < length; i++) {
double value = values.get(i);
min = Math.min(min, value);
max = Math.max(max, value);
}
return new double[] { min, max };
}
}
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