23 lines
494 B
Mathematica
23 lines
494 B
Mathematica
|
function sys = minus(X,Y)
|
||
|
|
%MINUS (overloaded)
|
||
|
|
|
||
|
|
if isempty(X)
|
||
|
|
sys = ([]);
|
||
|
|
return
|
||
|
|
end
|
||
|
|
|
||
|
|
if isempty(Y)
|
||
|
|
sys = X;
|
||
|
|
return
|
||
|
|
end
|
||
|
|
|
||
|
|
if isa(Y,'double') || isa(X,'double')
|
||
|
|
error('You cannot substract a point from a set of constraint. Constraint substraction is only used removal of constraints. To translate a set, use REPLACE')
|
||
|
|
end
|
||
|
|
|
||
|
|
idX = getlmiid(X);
|
||
|
|
idY = getlmiid(Y);
|
||
|
|
YinX = find(~ismember(idX,idY));
|
||
|
|
% Get the correct subsref...
|
||
|
|
sys = subsref(X,struct('type','()','subs',{{YinX}}));
|