how to add column in csv in matlab

To add a column in a CSV file using MATLAB, you can use the readtable and writetable functions to read and write the contents of the CSV file, respectively. You can also use the addvars function to add a column to the table read from the CSV file. Here's an example code snippet:

main.m
% Read the CSV file
data = readtable('mydata.csv');

% Add a new column to the table
newColumn = ['new value 1'; 'new value 2'; 'new value 3'; 'new value 4'; 'new value 5'];
data = addvars(data, newColumn, 'Before', 1, 'NewVariableNames', 'NewColumn');

% Write the updated table back to the CSV file
writetable(data, 'mydata_updated.csv');
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In this example, the readtable function is used to read the CSV file named mydata.csv into a table named data. The addvars function is then used to add a new column to the table, with the values specified in the newColumn variable. The Before parameter in the addvars function specifies that the new column should be added before the first column in the table. The NewVariableNames parameter specifies the name of the new column. Finally, the writetable function is used to write the updated table back to a new CSV file named mydata_updated.csv.