1 | function sys = updatelmi(F,thelmi) |
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2 | %updatelmi (OBSOLETE) Updates the numerical content of a symbolic LMI |
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3 | % |
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4 | % F = UPDATELMI(F,n) Updates the n'th symbolic LMIs |
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5 | % F = UPDATELMI(F,'tag') Updates the symbolic LMIs having specified tag |
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6 | % |
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7 | % See also LMI, DELLMI |
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8 | |
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9 | |
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10 | % Author Johan Löfberg |
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11 | % $Id: updatelmi.m,v 1.2 2004/07/19 13:54:37 johanl Exp $ |
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12 | |
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13 | error('updatelmi is obsolete'); |
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14 | |
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15 | if nargin ~=2 |
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16 | error('UPPDATELMI needs two argument') |
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17 | end |
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18 | |
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19 | if ~(isa(F,'lmi') & (isa(thelmi,'double') | isa(thelmi,'char'))) |
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20 | error('First argument should be an lmi object and second argument integer or string') |
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21 | end |
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22 | |
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23 | % If indexed using handle, convert to index |
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24 | if isa(thelmi,'char') |
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25 | thelmitemp = []; |
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26 | for i = 1:size(F.AllConstraints,2) |
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27 | if strcmp(F.AllConstraints{i}.handle,thelmi) |
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28 | thelmitemp=[thelmitemp i]; |
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29 | end |
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30 | end |
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31 | % for i = 1:size(F.Equalities,2) |
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32 | % if strcmp(F.Equalities{i}.handle,thelmi) |
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33 | % thelmitemp=[thelmitemp i+size(F.AllConstraints,2)]; |
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34 | % end |
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35 | % end |
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36 | if isempty(thelmitemp) |
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37 | em = ['LMI ''' thelmi ''' not available.']; |
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38 | error(em) |
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39 | else |
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40 | thelmi = thelmitemp; |
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41 | end |
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42 | end |
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43 | |
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44 | % Checks so that it exist |
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45 | if any((thelmi<1)) | any((thelmi>size(F.AllConstraints,2))) |
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46 | em = ['LMI #' num2str(thelmi) ' not available.']; |
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47 | error(em) |
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48 | end |
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49 | |
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50 | for j = 1:length(thelmi) |
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51 | nlmi = thelmi(j); |
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52 | % Get the old symbolic expression |
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53 | if (nlmi>size(F.AllConstraints,2)) |
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54 | % An equality constraint |
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55 | nlmi = nlmi-size(F.AllConstraints,2); |
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56 | X = F.Equalities{nlmi}.symbolic; |
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57 | eq = 1; |
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58 | else |
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59 | % LMI |
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60 | X = F.AllConstraints{nlmi}.symbolic; |
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61 | eq = 0; |
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62 | end |
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63 | |
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64 | % Check for symbolic value |
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65 | if strcmpi('Numeric value',X) |
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66 | error('Numeric LMIs cannot be updated'); |
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67 | end |
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68 | |
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69 | % Parse the LMI |
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70 | sdpvarExpr = parseLMI(X); |
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71 | X = strrep(X,'.>','>'); |
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72 | X = strrep(X,'.<','<'); |
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73 | X = strrep(X,'=','==');X = strrep(X,'====','=='); |
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74 | try |
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75 | Fi=evalin('caller',sdpvarExpr); |
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76 | catch |
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77 | error(lasterr) |
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78 | end |
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79 | |
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80 | TypeofConstraint = gethackflag(Fi); |
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81 | % User just sent a sdpvar object, interpret as X>0 |
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82 | if (TypeofConstraint==0) |
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83 | TypeofConstraint = 1; |
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84 | end |
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85 | |
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86 | % check so that LMIs are symmetric |
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87 | if (TypeofConstraint == 1) |
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88 | [n,m]=size(Fi); |
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89 | if (n~=m) | (~issymmetric(Fi)) |(n*m==1) |
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90 | TypeofConstraint = 2; %Change to elementwise |
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91 | end |
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92 | end |
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93 | |
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94 | % Check the normbound |
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95 | if (TypeofConstraint == 4) |
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96 | [n,m]=size(Fi); |
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97 | if m~=1 |
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98 | error('Norm ||..|| must look like || vector ||< scalar, or scalar>|| vector ||') |
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99 | end |
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100 | end |
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101 | |
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102 | sys=F; |
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103 | switch TypeofConstraint |
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104 | case {1,2,3,4} |
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105 | sys.AllConstraints{nlmi}.data=Fi; |
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106 | sys.AllConstraints{nlmi}.type = TypeofConstraint; |
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107 | sys.AllConstraints{nlmi}.symbolic=X; |
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108 | otherwise |
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109 | error('Error in argument.'); |
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110 | end |
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111 | end; |
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112 | |
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113 | |
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114 | |
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