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view +sbp/D1Upwind.m @ 1344:b4e5e45bd239 feature/D2_boundary_opt

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Remove round off zeros from D2Nonequidistant operators
author Vidar Stiernström <vidar.stiernstrom@it.uu.se>
date Sat, 15 Oct 2022 15:48:20 +0200
parents e1d11b6a68d8
children 111fcbcff2e9
line wrap: on
line source

classdef D1Upwind < sbp.OpSet
    properties
        Dp, Dm % SBP operator approximating first derivative
        H % Norm matrix
        HI % H^-1
        e_l % Left boundary operator
        e_r % Right boundary operator
        m % Number of grid points.
        h % Step size
        x % grid
        borrowing % Struct with borrowing limits for different norm matrices
    end

    methods
        function obj = D1Upwind(m,lim,order)

            x_l = lim{1};
            x_r = lim{2};
            L = x_r-x_l;
            obj.h = L/(m-1);
            obj.x = linspace(x_l,x_r,m)';

            switch order
                case 2
                    [obj.H, obj.HI, obj.Dp, obj.Dm, obj.e_l, obj.e_r] = ...
                        sbp.implementations.d1_upwind_2(m,obj.h);
                case 3
                    [obj.H, obj.HI, obj.Dp, obj.Dm, obj.e_l, obj.e_r] = ...
                        sbp.implementations.d1_upwind_3(m,obj.h);
                case 4
                    [obj.H, obj.HI, obj.Dp, obj.Dm, obj.e_l, obj.e_r] = ...
                        sbp.implementations.d1_upwind_4(m,obj.h);
                case 5
                    [obj.H, obj.HI, obj.Dp, obj.Dm, obj.e_l, obj.e_r] = ...
                        sbp.implementations.d1_upwind_5(m,obj.h);
                case 6
                    [obj.H, obj.HI, obj.Dp, obj.Dm, obj.e_l, obj.e_r] = ...
                        sbp.implementations.d1_upwind_6(m,obj.h);
                case 7
                    [obj.H, obj.HI, obj.Dp, obj.Dm, obj.e_l, obj.e_r] = ...
                        sbp.implementations.d1_upwind_7(m,obj.h);
                case 8
                    [obj.H, obj.HI, obj.Dp, obj.Dm, obj.e_l, obj.e_r] = ...
                        sbp.implementations.d1_upwind_8(m,obj.h);
                case 9
                    [obj.H, obj.HI, obj.Dp, obj.Dm, obj.e_l, obj.e_r] = ...
                        sbp.implementations.d1_upwind_9(m,obj.h);
                otherwise
                    error('Invalid operator order %d.',order);
            end

            obj.m = m;
        	obj.borrowing = [];

        end

        function str = string(obj)
            str = [class(obj) '_' num2str(obj.order)];
        end
    end


end