how to allocate memory for data which we don't know its size upfront? in matlab

In MATLAB, you can allocate memory for data whose size is not known upfront using dynamic memory allocation techniques. One way to achieve this is by using the cell data type, which can store elements of different sizes.

To allocate memory for an unknown-size data in MATLAB, you can create a cell array and populate it with the data dynamically. Here is an example:

main.m
% Initialize an empty cell array
data = cell(1, 0);

% Read data from a file or any other source
% Suppose you have a data vector of unknown length
dataVector = [1, 2, 3, 4, 5];

% Append the data to the cell array
data{end+1} = dataVector;

% Repeat the previous steps as needed for other data

% Access the data from the cell array
for i = 1:length(data)
    disp(data{i});
end
380 chars
17 lines

In this example, a cell array data is created without specifying its size upfront. The dataVector is then appended to the cell array using the end+1 index. Repeat this process for other data that you want to allocate.

Finally, you can access the data stored in the cell array using a loop or any other relevant method.

Remember that the dynamic allocation of memory using a cell array can be useful when you do not know the size of the data upfront, but it comes at the cost of potentially higher memory usage.

Hope this helps!