how can i creat an sub array with last n number of column of an array?

s =

1 2 3 4 5

6 7 8 9 10

11 12 13 14 15

a =

3 4 5

8 9 10

13 14 15

i am not getting 'a' using the code

A=s(1:n;end-n-1:end).

Answer 1

[madhan ravi]

By indexing you can achieve it :

   s=  [1     2     3     4     5
        6     7     8     9    10
       11    12    13    14    15];
   n = 3 ;  % last n number of columns
   a = s(:,n:end)

Gives:

a =

     3     4     5
     8     9    10
    13    14    15 

Answer 2

[Walter Roberson]

s(end-n+1:end,end-n+1:end)

[jakaria babar]

Thank you.

Answer 3

[jakaria babar]

I want to built a function of creating a n by n subarray of bottom right of an array of any dimension.