[37] | 1 | function symb_pvec = amplexpr(pvec) |
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| 2 | %AMPLEXPR Converts SDPVAR variable to AMPL string |
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| 3 | |
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| 4 | % Author Johan Löfberg |
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| 5 | % $Id: amplexpr.m,v 1.3 2005/02/10 16:43:32 johanl Exp $ |
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| 6 | |
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| 7 | for pi = 1:size(pvec,1) |
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| 8 | for pj = 1:size(pvec,2) |
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| 9 | p = pvec(pi,pj); |
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| 10 | |
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| 11 | if isa(p,'double') |
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| 12 | symb_p = num2str(p); |
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| 13 | else |
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| 14 | LinearVariables = depends(p); |
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| 15 | x = recover(LinearVariables); |
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| 16 | exponent_p = full(exponents(p,x)); |
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| 17 | names = cell(length(LinearVariables),1); |
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| 18 | for i = 1:length(LinearVariables) |
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| 19 | names{i}=['x[' num2str(LinearVariables(i)) ']']; |
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| 20 | end |
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| 21 | |
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| 22 | symb_p = ''; |
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| 23 | if all(exponent_p(1,:)==0) |
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| 24 | symb_p = num2str(getbasematrix(p,0)); |
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| 25 | exponent_p = exponent_p(2:end,:); |
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| 26 | end |
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| 27 | |
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| 28 | for i = 1:size(exponent_p,1) |
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| 29 | coeff = getbasematrixwithoutcheck(p,i); |
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| 30 | switch full(coeff) |
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| 31 | case 1 |
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| 32 | coeff='+'; |
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| 33 | case -1 |
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| 34 | coeff = '-'; |
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| 35 | otherwise |
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| 36 | if coeff >0 |
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| 37 | coeff = ['+' num2str2(coeff)]; |
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| 38 | else |
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| 39 | coeff=num2str2(coeff); |
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| 40 | end |
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| 41 | end |
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| 42 | if strcmp(symb_p,'') & (strcmp(coeff,'+') | strcmp(coeff,'-')) |
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| 43 | symb_p = [symb_p coeff symbmonom(names,exponent_p(i,:))]; |
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| 44 | else |
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| 45 | symb_p = [symb_p coeff '*' symbmonom(names,exponent_p(i,:))]; |
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| 46 | end |
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| 47 | end |
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| 48 | if symb_p(1)=='+' |
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| 49 | symb_p = symb_p(2:end); |
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| 50 | end |
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| 51 | end |
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| 52 | |
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| 53 | symb_p = strrep(symb_p,'+*','+'); |
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| 54 | symb_p = strrep(symb_p,'-*','-'); |
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| 55 | symb_pvec{pi,pj} = symb_p; |
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| 56 | end |
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| 57 | end |
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| 58 | |
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| 59 | function s = symbmonom(names,monom) |
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| 60 | s = ''; |
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| 61 | for j = 1:length(monom) |
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| 62 | if monom(j)>0 |
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| 63 | if strcmp(s,'') |
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| 64 | s = [s names{j}]; |
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| 65 | else |
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| 66 | s = [s '*' names{j}]; |
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| 67 | end |
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| 68 | end |
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| 69 | if monom(j)>1 |
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| 70 | s = [s '^' num2str(monom(j))]; |
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| 71 | end |
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| 72 | end |
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| 73 | |
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| 74 | function s = num2str2(x) |
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| 75 | s = num2str(x); |
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| 76 | if isequal(s,'1') |
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| 77 | s = ''; |
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| 78 | end |
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| 79 | if isequal(s,'-1') |
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| 80 | s = '-'; |
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| 81 | end |
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