1 | function [F,h] = loadsedumidata(varargin) |
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2 | %LOADSEDUMIDATA Loads a problem definition in the SeDuMi format |
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3 | % |
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4 | % [F,h] = loadsedumidata('filename') Loads the problem min(h(x)), F(x)>0 from file 'filename' |
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5 | % [F,h] = loadsedumidata An "Open" - box will be opened |
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6 | |
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7 | % Author Johan Löfberg |
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8 | % $Id: loadsedumidata.m,v 1.2 2005/09/16 08:10:24 joloef Exp $ |
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9 | |
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10 | filename = varargin{1}; |
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11 | |
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12 | % Does the file exist |
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13 | if ~exist(filename) |
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14 | filename = [filename '.mat']; |
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15 | if ~exist(filename) |
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16 | error(['No such file.']); |
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17 | end |
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18 | end |
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19 | |
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20 | load(filename) |
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21 | try |
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22 | b = b(:); |
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23 | c = c(:); |
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24 | if ~exist('At') |
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25 | At = A; |
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26 | end |
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27 | K = K; |
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28 | catch |
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29 | error('The file should contain the data At, b, c and K'); |
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30 | end |
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31 | |
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32 | nvars = length(b); |
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33 | x = sdpvar(nvars,1); |
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34 | |
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35 | if size(At,2)~=length(b) |
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36 | At = At'; |
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37 | end |
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38 | |
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39 | F = set([]); |
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40 | top = 1; |
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41 | |
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42 | if isvalidfield(K,'f') |
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43 | X = c(top:top+K.f-1)-At(top:top+K.f-1,:)*x; |
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44 | F = F + set(X(:) == 0); |
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45 | top = top + K.f; |
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46 | end |
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47 | |
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48 | if isvalidfield(K,'l') |
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49 | X = c(top:top+K.l-1)-At(top:top+K.l-1,:)*x; |
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50 | F = F + set(X(:)); |
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51 | top = top + K.l; |
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52 | end |
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53 | |
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54 | if isvalidfield(K,'q') |
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55 | for i = 1:length(K.q) |
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56 | X = c(top:top+K.q(i)-1)-At(top:top+K.q(i)-1,:)*x; |
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57 | F = F + set(cone(X(2:end),X(1))); |
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58 | top = top + K.q(i); |
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59 | end |
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60 | end |
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61 | |
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62 | if isvalidfield(K,'r') |
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63 | for i = 1:length(K.r) |
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64 | X = c(top:top+K.r(i)-1)-At(top:top+K.r(i)-1,:)*x; |
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65 | F = F + set(rcone(X(3:end),X(2),X(1))); |
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66 | top = top + K.r(i); |
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67 | end |
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68 | end |
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69 | |
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70 | if isvalidfield(K,'s') |
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71 | for i = 1:length(K.s) |
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72 | [ix,iy,iv] = find([c(top:top+K.s(i)^2-1) At(top:top+K.s(i)^2-1,:)]); |
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73 | off = (ix-1)/(K.s(i)+1); |
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74 | if all(off == round(off)) |
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75 | X = c(top:top+K.s(i)^2-1)-At(top:top+K.s(i)^2-1,:)*x; |
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76 | F = F + set(diag(reshape(X,K.s(i),K.s(i))) > 0); |
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77 | top = top + K.s(i)^2; |
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78 | else |
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79 | X = c(top:top+K.s(i)^2-1)-At(top:top+K.s(i)^2-1,:)*x; |
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80 | F = F + set(reshape(X,K.s(i),K.s(i)) > 0); |
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81 | top = top + K.s(i)^2; |
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82 | end |
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83 | end |
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84 | end |
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85 | |
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86 | h = -b'*x; |
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87 | |
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88 | function ok = isvalidfield(K,fld) |
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89 | ok = 0; |
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90 | if isfield(K,fld) |
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91 | s = getfield(K,fld); |
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92 | if prod(size(s))>0 |
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93 | if s(1)>0 |
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94 | ok = 1; |
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95 | end |
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96 | end |
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97 | end |
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98 | |
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