Add rows to table, not append

I have a table and need to add rows to it, but I do not want to append them to the end of the table. For instance, I have a table with 5 rows and I need to add a row, but I need the new row to be the 2nd row and all the successive rows to move down one.

Answer 1

[Star Strider]

One approach is to duplicate the table by first moving everything from the second row to the end down one, then inserting the new row into it —

T1 = array2table(randi(9 ,10, 3))

T1 = 10×3 table
    Var1    Var2    Var3
    ____    ____    ____

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

newRow = randi([10 19], 1, 3)

newRow = 1×3

10 12 11

T1{3:end+1,:} = T1{2:end,:};                            % Expand Table Row Length
T1{2,:} = newRow                                        % Insert New Row To Create Desired REsult

T1 = 11×3 table
    Var1    Var2    Var3
    ____    ____    ____

      2       7       6 
     10      12      11 
      5       1       1 
      3       2       6 
      8       3       8 
      2       2       9 
      2       4       5 
      2       9       7 
      3       5       3 
      6       2       8 
      5       2       2 

.

[Siddharth Bhutiya]

Another way to do it would be to use vertcat.

>> T1 = array2table(randi(9 ,10, 3))

T1 =

  10×3 table

    Var1    Var2    Var3
    ____    ____    ____

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

>> i = 2; % Insert a new second row
>> data = {10 12 11}; % new data for the second row
>> T1 = [T1(1:i-1,:); data; T1(i:end,:)]

T1 =

  11×3 table

    Var1    Var2    Var3
    ____    ____    ____

      7       4       3 
     10      12      11 
      1       4       7 
      3       7       6 
      1       8       2 
      1       2       2 
      8       5       5 
      7       5       9 
      3       6       4 
      9       7       6 
      1       7       3