1 | function F0 = subsasgn(F,Y,Z) |
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2 | %subasgn Overloaded indexing |
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3 | |
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4 | % Author Johan Löfberg |
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5 | % $Id: subsasgn.m,v 1.4 2005/04/29 16:28:03 joloef Exp $ |
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6 | |
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7 | % TODO : Implement lmi/subsasgn... |
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8 | %error('set/subsasgn not fully implemented yet. Contact author if you need this functionality') |
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9 | switch Y(1).type |
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10 | case '()' |
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11 | thelmi = Y.subs{1}; |
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12 | |
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13 | if ~isa(F,'lmi') |
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14 | error('First argument should be a SET object') |
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15 | end |
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16 | |
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17 | if ~(isa(thelmi,'double') | isa(thelmi,'char')) |
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18 | error('Index should be an integer integer or tag-string') |
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19 | end |
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20 | |
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21 | if ~(isa(Z,'lmi') | isempty(Z)) |
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22 | error('Right-hand side should be a SET object or empty'); |
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23 | end |
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24 | |
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25 | % If indexed using handle, convert to index |
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26 | if isa(thelmi,'char') |
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27 | thelmitemp = []; |
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28 | for i = 1:size(F.clauses,2) |
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29 | if strcmp(F.clauses{i}.handle,thelmi) |
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30 | thelmitemp=[thelmitemp i]; |
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31 | end |
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32 | end |
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33 | if isempty(thelmitemp) |
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34 | em = ['LMI ''' thelmi ''' not available.']; |
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35 | error(em) |
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36 | else |
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37 | thelmi = thelmitemp; |
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38 | end |
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39 | end |
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40 | |
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41 | % Convert to linear indecicies |
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42 | if islogical(thelmi) |
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43 | thelmi = double(find(thelmi)); |
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44 | end |
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45 | |
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46 | % Checks so that it exist |
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47 | if any((thelmi<1)) | any((thelmi>size(F.clauses,2))) |
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48 | em = ['LMI #' num2str(thelmi(find(thelmi>size(F.clauses,2)))) ' not available.']; |
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49 | error(em) |
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50 | end |
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51 | |
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52 | F0 = F; |
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53 | |
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54 | % Specialized for deleting constraints |
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55 | if isempty(Z) |
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56 | F0.clauses = {F0.clauses{setdiff(1:size(F.clauses,2),thelmi)}}; |
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57 | F0.LMIid = F0.LMIid(setdiff(1:size(F.clauses,2),thelmi)); |
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58 | else |
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59 | if length(thelmi) < length(Z.clauses) |
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60 | error('??? In an assignment A(I) = B, the number of elements in B and I must be the same.'); |
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61 | end |
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62 | for i = 1:length(thelmi) |
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63 | F0.clauses{thelmi(i)} = Z.clauses{i}; |
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64 | F0.LMIid(thelmi(i)) = Z.LMIid(i); |
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65 | end |
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66 | end |
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67 | |
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68 | case '{}' |
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69 | switch length(Y) |
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70 | case 1 |
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71 | if length(Y.subs)>1 |
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72 | error('Only one-dimensional indexing of set objects allowed'); |
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73 | end |
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74 | if Y.subs{1}>length(F.clauses) |
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75 | em = ['LMI #' num2str(Y.subs{1}) ' not available.']; |
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76 | error(em) |
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77 | error('Index exceeds set dimension.') |
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78 | end |
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79 | F0 = F.clauses{Y.subs{1}}.data; |
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80 | case 2 |
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81 | F0 = F.clauses{Y(1).subs{1}}.data; |
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82 | F0 = subsref(F0,Y(2)); |
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83 | otherwise |
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84 | error('Indexing type not supported'); |
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85 | end |
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86 | otherwise |
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87 | error('Indexing type not supported'); |
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88 | end |
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89 | |
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90 | |
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91 | |
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