MATLAB: How to search for an array inside another array

Question

E.g: I have the following array:

a = [1 1; 1 2; 1 3; 1 4; 1 1; 1 4; 1 5];

I want to search for the occurance of each row of the following array inside "a":

b = [1 1; 1 4; 1 5]

The output should be the index location as follows:

idx = [1;5;4;6;7]

I tried the following code. But it does not work:

idx = [];
for i = size(b,1)
    
    temp_idx = find(b(i,:) == a )
    idx = [idx; temp_idx];
    
end

I there any way to do this ?

Answer 1

idx=find(ismember(a,b,'row'))