add coloumn to a matrix using if statement

I have a matrix A(6x8)[6 rows, 8 columns] ,how can I add a new columns to be A(6x16)if every elements of this matrix satisfy these conditions bellow if A(i,j)<5 add (0), if 5<A(i,j)<10 add (1), if 10<A(i,j)<15 add 2 finally if A(i,j)>15 add 4 I can't reassemble this matrix again when using a loop, so I need now a suitable script to solve my tasks. Please if someone could help me and many thanks to all GAMMAY from EGYPT

[Matt J]

If you're only adding 0,1,2, or 4 columns then the greatest number of additional columns can be 4. Yet, if the final matrix has 16 columns, it means you've added 8.

Answer 1

[Image Analyst]

Try this:

%a = randi(20, 6,8)
columnsToAdd = 0
if all(a <= 5)
  columnsToAdd = 0
elseif all(a > 5 & a <= 10)
  columnsToAdd = 2
elseif all(a > 10 & a <= 15)
  columnsToAdd = 4
elseif all(a > 15)
  columnsToAdd = 6
end

if columnsToAdd > 0
  [rows, columns] = size(a)
  a = [a, zeros(rows, columnsToAdd )]
end

Answer 2

[Matt J]

Hint:

>> A=rand(3,4); newcolumns=2; A(end,end+newcolumns)=0

A =

      0.3112    0.6020    0.6892    0.0838         0         0
      0.5285    0.2630    0.7482    0.2290         0         0
      0.1656    0.6541    0.4505    0.9133         0         0