Shrishtisharma asked . 2020-07-28

How to insert a n x m matrix or table, into an existing table?

I would like to nest an n x m matrix into a table, by using a for loop to populate each row of the table with a corresponding matrix. I am running matlab 2018a. Below you can find example code:

% create the table
subject = [1; 2; 3; 4];
condition = {'cond1';'cond2';'cond3';'cond4'};
data = NaN(4,1);
T = table(subject,condition,data);
% populate the table with matrixes, using a for loop
for i = 1:1:size(T,1)
    data = rand(10,5);
    T.data(i) = data;    % ERROR Unable to perform assignment because the left and right sides have a different number of elements.
end    

I thought it was possible to create nested tables. However, I am not sure, on account of the error. I know tables within tables exists, but I am unsure whether you can nest a matrix/array in a table. Therefore, it is also allowed to transform the data matrix to a table, and then nest the table in the table. Of importance, I want to retain the for loop mechanism to populate the table.

matrix , matlab