Adding values to a table

Hello everyone,

I'm trying to run through a specific column of a table and add values to the rows in that column.

How do I actually refer to the rows/cells of the table that I want to access? In a low level language like C it would be row[i] but I don't know the equivalent in MATLAB.

I've put the code below with a comment in the for loop explaining what I want to do.

Kind regards,

John

%Creates a table called 'tab' using the data in the coronavirus-cases.csv file.
tab = readtable("coronavirus-cases.csv");
%Creates a table called 'newTabCol' with the height of tab and a width of 1.
newTabCol = zeros(height(tab), 1);
%Adds the column and titles it "Seven Day Average".
tab.SevenDayAverage = newTabCol;
for i = 1: height(tab)
    %Set all values in SevenDayAverage to 1.
end

[Dyuman Joshi]

Why not set the values in the newTabCol array and assign it like you have done (instead of going through the for loop)?

"How do I actually refer to the rows/cells of the table that I want to access?"

Access Data in Tables

Answer 1

[Star Strider]

One approach (that works) —

DateTime = datetime([2020 01  01]) + calmonths(0:5)';
Incidence = randi(10,6,1);
tab = table(DateTime,Incidence)

tab = 6×2 table
     DateTime      Incidence
    ___________    _________

    01-Jan-2020        9    
    01-Feb-2020        8    
    01-Mar-2020        9    
    01-Apr-2020        4    
    01-May-2020        7    
    01-Jun-2020        2    

newRow = {datetime('01-Jul-2020') 8};
tab(end+1,:) = newRow

tab = 7×2 table
     DateTime      Incidence
    ___________    _________

    01-Jan-2020        9    
    01-Feb-2020        8    
    01-Mar-2020        9    
    01-Apr-2020        4    
    01-May-2020        7    
    01-Jun-2020        2    
    01-Jul-2020        8    

.