What is the code to add one row above in table?

Hi! This might be an easy question, but since I am new in matlab, I do not know how to add one row in the first row of table. have a table consist only one column called "timediff" with the size 2143x1 table, I want to make it 2144x1 table, with the addition one row in the first row, and the value is 0. Could you please help me? Thank you in advance

Answer 1

[Birdman]

You have to convert the array elements to string, add the specified row and then create a table. An example:

a=5*ones(2143,1);%this is a double array
aTable=array2table(a);%2143x1 table
b=3;%new variable to be added
aNewTable=array2table(str2double([string(b);string(a)]));%2144x1 table

[Kasih Ditaningtyas Sari Pratiwi]

sorry I forgot, because this will be an automation data, the number of rows would be changed based on the chosen data. But it's still to add one row in the first row. Assuming we dont know the number of rows, do you know how to do it? Thank you for your help

[Birdman]

row=input('Enter number of rows\n');
a=5*ones(2143,1);
aTable=array2table(a);
b=3*ones(row,1);
aTablee=array2table(str2double([string(b);string(a)]))

We can make the number of row variable like this, a user data.

[Kasih Ditaningtyas Sari Pratiwi]

It works! Thanks

Answer 2

[Peter Perkins]

My first observation is that if your table has only one variable, you are likely better off not using a table. They are containers for mix-type data. But your Nx1 table may just be a starting point for more vars.

To add a row at the beginning, do exactly the same thing you would do with a numeric vector: use vertcat.

>> t = table([1;2;3])
t =
  3×1 table
    Var1
    ____
     1  
     2  
     3  
>> t = [table(0); t]
t =
  4×1 table
    Var1
    ____
     0  
     1  
     2  
     3