dpb
Posts:
9,662
Registered:
6/7/07


Re: Insert row in an array and delete last row
Posted:
Jan 20, 2013 2:17 PM


On 1/20/2013 11:11 AM, Michael Doukas wrote: > "Michael Doukas" wrote in message > <kdh748$a5g$1@newscl01ah.mathworks.com>... >> I have the following code (it is for a Tabu search algorithm): >> >> 1: InitialSol=generator; 2: lsol=size(InitialSol,2); >> 3: List=zeros(l,lsol); >> 4: i=0; >> 5: 6: while i<=l >> 8: Sol=tweak(InitialSol); >> 9: % check if tweaked child already exists in the tabu list >> 10: if ismember(Sol,List)==0 >> 12: List=circshift(List,1); 13: List(i,:)=Sol; >> 14: i=i+1; >> 15: end >> 16: end >> But it reaches line 13 and throws: >> Subscript indices must either be real positive integers or logicals. ...
Quite a few problems here...
The immediate problem is that you initialized i to zero and so the first time there's a new entry added the subscript for L(i,:) is L(0,:).
Either initialize i=1; or move the increment to be before the first usage.
But, the ismember() usage isn't right, anyway...remember the 'rows' optional argument? Plus, it returns a logical array which will be T iff each member is T. If the idea is to not have any duplicates in L, then
if ~any(ismember(Sol,List,'rows')
doc any doc equal


