How to create multiple matrixes from a single for loop?

Hi, I have a for loop that produces a matrix after each iteration and currently the resultant matrix is a combination of the matrixes from each iteration.

However, I want to be able to have separate matrixes for each iteration so that I am able to index the first and last row of each.

Heres the part of the script:

% Plotting gradient descent
for counter = 1:length(startingcoordinates)
   % Extracting the x and y from the starting coordinates
   xi = startingcoordinates(counter,1);
   yi = startingcoordinates(counter,2);
   % Storing each trajectory
   Trajectory = gradient_descent(Z,xi,yi,gamma,tau);
end

Where:

startingcoordinates is a 4 by 2 matrix containing x and y co-ordinates.

gradient_descent is a function that finds the minimum of a surface Z.

Thanks for reading.

[Jan]

I've formatted your message and removed many blank lines to improve the readability.

"the resultant matrix is a combination of the matrixes from each iteration." - This is not clear. How is it "combinated"?

[Carlos Pedro]

Hi Jan, thanks.

The output is currently the output of one iteration followed by another iteration. Its probably worth saying that each iteration produces a large matrix of size n by 3.

Answer 1

[Jan]

With some guessing:

nCoor = size(startingcoordinates, 1);   % Safer than LENGTH()!!!
Trajectory = cell(1, nCoor);
% Plotting gradient descent
for counter = 1:nCoor
   % Extracting the x and y from the starting coordinates
   xi = startingcoordinates(counter,1);
   yi = startingcoordinates(counter,2);
   % Storing each trajectory
   Trajectory{counter} = gradient_descent(Z,xi,yi,gamma,tau);
end

[Carlos Pedro]

Thanks Jen, thats just what I was looking for!