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[37] | 1 | function p = polytope(X) |
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| 2 | % polytope Converts set object to polytope object |
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| 3 | % |
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| 4 | % P = polytope(F) |
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| 5 | % [P,x] = polytope(F) |
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| 6 | % |
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| 7 | % P : polytope object (Requires the Multi-parametric Toolbox) |
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| 8 | % x : sdpvar object defining the variables in the polytope P.H*x<P.K |
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| 9 | % F : set-object with linear inequalities |
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| 10 | |
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| 11 | % Author Johan Löfberg |
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| 12 | % $Id: polytope.m,v 1.3 2005/02/04 10:10:27 johanl Exp $ |
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| 13 | |
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| 14 | |
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| 15 | if all(is(X,'element-wise'))% & all(is(X,'linear')) |
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| 16 | f = []; |
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| 17 | for i = 1:length(X) |
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| 18 | if X.clauses{i}.type==2 |
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| 19 | fi = X.clauses{i}.data; |
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| 20 | f = [f;fi(:)]; |
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| 21 | end |
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| 22 | end |
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| 23 | |
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| 24 | B = full(getbase(f)); |
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| 25 | p = polytope(-B(:,2:end),B(:,1)); |
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| 26 | else |
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| 27 | error('polytope can only be applied to SET objects with linear inequalities.') |
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| 28 | end |
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