search for rows of a matrix within bigger matrix (without for loop)

A=[1 6 ;5 4 ;1 5 ;6 9 ;2 1;9 4;7 7]; B=[1 6 ;6 9 ;7 7];

I would like to search for rows of a matrix B within A. the result gives me the indices of matched rows [1 4 7] It works with me with for loop.However, i am trying to find another way to do it without for loop,any ideas please?

Thank you in advance

Answer 1

[Honglei Chen]

[C,IA] = intersect(A,B,'rows')

or

[tf,rowA] = ismember(B,A,'rows')

see

doc intersect
doc ismember

[Saleem Infinity]

Thank you Honglei Chen,

i have checked it out, but apparently it is not enough,

since duplicate rows in B will not be recognized.

if B=[1 6 ;1 6;6 9 ;7 7]; the result will be also [1 4 7] and i want it to be like [1 1 4 7]

[Oleg Komarov]

[tf,rowA] = ismember(B,A,'rows')

You need rowA

[Saleem Infinity]

Thank you SO MUCH Oleg, that is exactly what i wanted :)

i really appreciate your help.

Thank you again

[Honglei Chen]

I added Oleg's comment to the answer so it is more visible to other people.