How can I take the values of one array as inputs to check a condition for another array?

Say I have an array like A = [1 1 0; 0 1 0] and B = [1 3; 2 2; 2 3] where B are coordinates in A. How can I input B into A to check if these coordinates = 1? In other words, how can I check if A(1,3), A(2,2), and A(2,3) = 1?

[Alexandra Topciov]

 A = [1 1 0; 0 1 0];
 B = [1 3; 2 2; 2 3];
for i=1:length(B)
    column_1=B(i,1);
    column_2=B(i,2);
    Answer{i}=A(column_1,column_2)==1;
end

[Guillaume]

Alexandra, If you're giving an answer, please post them as answers, not comments to the question.

Also, DO NOT use length with a 2d matrix. If B has only one row, your code will break because of the usage of length.

Answer 1

[Stephen23]

You can use sub2ind to convert the row and column indices to linear indices:

>> A = [1 1 0; 0 1 0];
>> B = [1 3; 2 2; 2 3];
>> X = sub2ind(size(A),B(:,1),B(:,2));
>> A(X)
ans =
   0
   1
   0
>> all(A(X))
ans = 0