my_array = array(1:16,c(4,4))

my_array

#All rows in 4th column
my_array[,4]

#2nd and 3rd rows in 3rd column
my_array[2:3,3]

#4th row 2nd column
my_array[4,2]

# to fetch 4 mid values
my_array[2:3,2:3]

# changing the data in array
my_array[1,] = c(100,200,3,400)
my_array

my_array[2:3,2:4] = array(c(29,65,78,67,34,31),c(2,3))
my_array