How to "filter" a matrix using a vector quantity?

I have a matrix [8x3] and a vector quantity that's [6x1].

What I'm trying to do is pick out the three values from the vector within the matrix. Here is the code I'm running.

x=[1;2;3;4;5;6]

x =

       1
       2
       3
       4
       5
       6
  y=[1,2,3;2,2,3;3,3,4;4,5,7;5,6,7;6,7,8;7,4,3;8,2,3]
  y =

       1     2     3
       2     2     3
       3     3     4
       4     5     7
       5     6     7
       6     7     8
       7     4     3
       8     2     3
  N=y(x)
  N =

       1
       2
       3
       4
       5
       6

Obviously my code has more numbers, but essentially the above is what I'm trying to do. However, I want to keep the entire matrix from rows 1 through 6 intact in the answer. Is there any command that can do that? In other words, I want this as the final answer:

   N =

     1     2     3
     2     2     3
     3     3     4
     4     5     7
     5     6     7
     6     7     8

I just typed the last part in in, but how do I do that for bigger number sets with a certain command automatically? Thanks

Answer 1

[dpb]

Almost there...

N=y(x,:);

the x vector is the row index, : picks up all the columns.

doc colon

for the details. Also might working thru the exercises/examples in the "Getting Started" section on basic array manipulation and addressing...

Answer 2

[Shane]

That's makes sense.