r - Change a part of a bigger matrix with a smaller one -

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I have two metrics and I would like to change the small part of the small one.

So this is the first and this is the second matrix:

Large matrix: 

  matrix 1 = matrix (1: 36, nrow = 6, ncol = 6)   
 Small matrix:  
  matrix 2 = matrix (1: 10, nrow = 2, ncol = 5)  < / Pre> 
 and should result in merging them:  <,> [, 1] [, 2] [, 3] [, 4] [, 5] [, 6] [ 1,] 1 7 13 1 9 25 31 [2,] 2 8 14 20 26 32 [3,] 3 9 15 21 27 33 [4,] 1 3 5 7 9 34 [5,] 2 4 6 8 10 35 [6,] 6 12 18 24 30 36   
 Where only a part of the result matrix is ​​smaller in the larger one in a special part 
  
 
 
 Here, the rules are not clear It looks like you have the  matrix 1  Want to change the fourth and fifth line of  matrix2  with column  1  to  5 . In that case:  
  matrix new <- matrix 1 # has made a copy of the matrix 1 matrix [4: 5, -6]   
  Specific part  where a small number of seats sit 4 and 5 And columns are from 1 to 5. Therefore, I type the line index  4: 5  i.e. 4th and 5th, and column index  -6  from  [ to  subset  with. In Matrix 1, there are 6 columns, therefore, removes the column from  -6  6 and leaves the 1: 5 column in the subset. Values ​​based on  index  are replaced by  matrix 2  values ​​

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