how to replace values in matrix across entire row

I want to replace current values in a particular row of matrix with different values for each index in that particular row

Answer 1

[Walter Roberson]

%example data
A = randi(9, 8, 4)

A = 8×4

9 3 8 5 2 9 3 9 6 9 8 9 8 6 3 1 7 2 2 1 7 8 8 1 5 2 8 9 4 8 7 9

%example row-based operations
A(3,:) = A(3,:).^2 - 2

A = 8×4

9 3 8 5 2 9 3 9 34 79 62 79 8 6 3 1 7 2 2 1 7 8 8 1 5 2 8 9 4 8 7 9

A(6, :) = randi([10 19], 1, 4)

A = 8×4

9 3 8 5 2 9 3 9 34 79 62 79 8 6 3 1 7 2 2 1 16 11 10 10 5 2 8 9 4 8 7 9

[Kumaresan Karunanidhy]

Thank you for quick response.