how can I add a value to a particular cell in an array.

if [3,2,4,5;3,2,6,4;2,5,8,5] is array then we add we add 2 to the second row to become [2,3,2,5;3, 4,6,4;2,5,8,5]

[Star Strider]

Your examples do not match what you state you want to do.

Answer 1

[KL]

if A is your array,

>> A = [3,2,4,5;3,2,6,4;2,5,8,5]
A =

     3   2   4   5
     3   2   6   4
     2   5   8   5

and if you want to add 2 to 2nd row, 2nd column,

 A(2,2) = A(2,2)+2;

and then A becomes,

 A =

   3   2   4   5
   3   4   6   4
   2   5   8   5

is this what you mean?