[14007] | 1 | #region License Information |
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| 2 | |
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| 3 | /* HeuristicLab |
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| 4 | * Copyright (C) 2002-2016 Heuristic and Evolutionary Algorithms Laboratory (HEAL) |
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| 5 | * |
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| 6 | * This file is part of HeuristicLab. |
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| 7 | * |
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| 8 | * HeuristicLab is free software: you can redistribute it and/or modify |
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| 9 | * it under the terms of the GNU General Public License as published by |
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| 10 | * the Free Software Foundation, either version 3 of the License, or |
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| 11 | * (at your option) any later version. |
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| 12 | * |
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| 13 | * HeuristicLab is distributed in the hope that it will be useful, |
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| 14 | * but WITHOUT ANY WARRANTY; without even the implied warranty of |
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| 15 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
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| 16 | * GNU General Public License for more details. |
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| 17 | * |
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| 18 | * You should have received a copy of the GNU General Public License |
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| 19 | * along with HeuristicLab. If not, see <http://www.gnu.org/licenses/>. |
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| 20 | */ |
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| 21 | |
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| 22 | #endregion |
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| 23 | |
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| 24 | using System; |
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| 25 | |
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| 26 | namespace HeuristicLab.Visualization.ChartControlsExtensions { |
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| 27 | public static class ChartUtil { |
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| 28 | public static void CalculateAxisInterval(double min, double max, int ticks, out double axisMin, out double axisMax, out double axisInterval) { |
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| 29 | var dmin = (max - min).Decimals(); |
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| 30 | axisMin = min.Floor(dmin); |
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| 31 | var range = max - axisMin; |
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| 32 | var slice = range / ticks; |
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| 33 | var dslice = slice.Decimals(); |
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| 34 | var floor = slice.Floor(dslice); |
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| 35 | var ceil = slice.Ceil(dslice); |
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| 36 | var axisRange = floor * ticks; |
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| 37 | axisInterval = floor; |
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| 38 | if (axisRange < max - axisMin) { |
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| 39 | axisRange = ceil * ticks; |
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| 40 | axisInterval = ceil; |
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| 41 | } |
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| 42 | axisMax = axisMin + axisRange; |
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| 43 | } |
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| 44 | |
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| 45 | private static int Decimals(this double x) { |
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| 46 | if (x.IsAlmost(0) || double.IsInfinity(x) || double.IsNaN(x)) |
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| 47 | return 0; |
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| 48 | |
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| 49 | var v = Math.Abs(x); |
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| 50 | int d = 0; |
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| 51 | while (v < 1) { |
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| 52 | v *= 10; |
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| 53 | d++; |
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| 54 | } |
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| 55 | return d; |
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| 56 | } |
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| 57 | |
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| 58 | // rounds down to the nearest value according to the given number of decimal precision |
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| 59 | private static double Floor(this double value, int precision) { |
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| 60 | var n = Math.Pow(10, precision); |
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| 61 | return Math.Round(Math.Floor(value * n) / n, precision); |
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| 62 | } |
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| 63 | |
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| 64 | private static double Ceil(this double value, int precision) { |
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| 65 | var n = Math.Pow(10, precision); |
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| 66 | return Math.Round(Math.Ceiling(value * n) / n, precision); |
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| 67 | } |
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| 68 | |
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| 69 | private static double Round(this double value, int precision) { |
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| 70 | var n = Math.Pow(10, precision); |
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| 71 | return Math.Round(Math.Round(value * n) / n, precision); |
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| 72 | } |
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| 73 | |
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| 74 | private static bool IsAlmost(this double value, double other, double eps = 1e-12) { |
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| 75 | return Math.Abs(value - other) < eps; |
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| 76 | } |
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| 77 | } |
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| 78 | } |
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