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annotate +sbp/D2Variable.m @ 263:21a180acbd49 operator_remake

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Renamed standard class to D2Standard etc, Rewrote class properties.
author Martin Almquist <martin.almquist@it.uu.se>
date Thu, 08 Sep 2016 17:50:30 +0200
parents 23051a86faa4
children 8a625c5a3633
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07fa0d6a05bb Renamned class files and added nonequidistant operators.
Martin Almquist <martin.almquist@it.uu.se>
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1 classdef D2Variable < sbp.OpSet
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2 properties
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3 D1 % SBP operator approximating first derivative
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4 H % Norm matrix
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5 HI % H^-1
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6 Q % Skew-symmetric matrix
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7 e_1 % Left boundary operator
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8 e_m % Right boundary operator
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9 D2 % SBP operator for second derivative
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10 M % Norm matrix, second derivative
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11 S_1 % Left boundary first derivative
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12 S_m % Right boundary first derivative
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13 m % Number of grid points.
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14 h % Step size
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15 x % grid
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16 borrowing % Struct with borrowing limits for different norm matrices
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17 end
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19 methods
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20 function obj = D2Variable(m,L,order)
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21
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22 obj.h = L/(m-1);
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23 obj.x = linspace(0,L,m)';
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24
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25 switch order
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26 case 4
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27 [obj.H, obj.HI, obj.D1, obj.D2, obj.e_1,...
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28 obj.e_m, obj.S_1, obj.S_m] = ...
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29 sbp.implementations.d2_variable_4(m,obj.h);
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30 obj.borrowing.M.S = 0.2505765857;
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31 otherwise
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32 error('Invalid operator order %d.',order);
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33 end
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34
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35 obj.m = m;
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36 obj.M = [];
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38 end
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41 end
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