using the transformation history

[hkhakwani98]

I have two arrays of different sizes .Array A (N2) and Array B(N2) . i am giving the points in these two arrays to your icp where i know that these points are corresponding to each other and the algorithm is aligning them correctly as well. i then get a transformation history of (N23) and i convert it to one (2*3) array by multiplying all of them together but when i apply this transformation matrix to the points i want to be aligned (array b). the mapping isnt taking place . thankyou