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

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Kasih Ditaningtyas Sari Pratiwi 2017-11-7

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回答： Peter Perkins 2017-11-16

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

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Answer 1

Birdman 2017-11-7

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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

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Birdman 2017-11-7

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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 2017-11-7

It works! Thanks

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Answer 2

Peter Perkins 2017-11-16

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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