How do I add a 52x1 data set to 52x5 matrix.

I have a set of data (influenza_a) that I am trying to add to a data matrix (data_matrix):

data_matrix = zeros(52, 5);
influenza_a = data{:, 6} + data{:, 8};
data_matrix{ :, i } = influenza_a;

However, it returns the error:

Cell contents assignment to a non-cell array object.

So how do I add the values of influenza_a to a column in the data_matrix?

Here is my full code:

directory = ('/ParentDirectory/Data/');

csvfiles = dir(fullfile(directory,'*.csv'));
data_matrix = zeros(52, 5);
iter = 0;

for file = 1:numel(csvfiles)
  iter = iter + 1;
  delimiter = ',';
  startRow = 2;
  formatSpec = '%f%f%f%f%f%f%f%f%f%f%f%[^\n\r]';

    filename = fullfile(directory, csvfiles(file).name);
    fileID = fopen(filename,'r');
    if fileID < 0
        error('Failed to open file %s', filename);
    end

    data = textscan(fileID, formatSpec, 'Delimiter', delimiter, 'HeaderLines' ,startRow-1, 'ReturnOnError', false);
    fclose(fileID);

    influenza_a = data{:, 6} + data{:, 8};
    data_matrix{:, file} = influenza_a;

Answer 1

[Walter Roberson]

    data_matrix(:, file) = influenza_a;