MATLAB: If i have matrix how to do this operation on it ?

functionMATLABmatrix

and if i have this matrix A , a , b
   A = [ 1 3 
         1 1 
         2 2 
         2 0  ]
   a = [ 4          which mean how there is one in A 
         2
         4
         2 ]
   b = [ 2          which mean how there is element in A 
         2 
         2 
         1 ]
after that i want to do this
F = zeros(4,5);
for k=1:n
 if m == ( a(k) + ( b(k) - 1 ))
   IF the condition is true then goes to the same k row in A and put it in F the ones like that
After apply this loop then in first row and in third row the condition is true
   F = [ 1 0 1 1 1 
         0 0 0 0 0
         1 1 0 1 1
         0 0 0 0 0 ]

Best Answer

>> m=5; n=length(A);     % define sizes
>> F=zeros(n,m);         % preallocate output
>> ix=find(sum(A,2)+sum(A~=0,2)-1==m);  % rows contain some ones
>> F(ix,:)=1;                           % start with all '1'
>> F(sub2ind(size(F),ix,A(ix,1)+1))=0   % zero the locations not '1'
F =
   1     0     1     1     1
   0     0     0     0     0
   1     1     0     1     1
   0     0     0     0     0
>>
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