Question

I need to save multiple arrays to a text file in the following format:

n=2 %number of arrays

r=3 %number of rows in the first array
1 2 3 % actual data
4 5 6
7 8 9

r=3 %number of rows in the second array
5 6 7 % actual data
1 2 3
7 8 9

Would you help please

Answer 1

Use fprintf. If your arrays are stored in a cell array so that you can iterate through them.

arrays = cell(N, 1); %A cell array of arrays

f = fopen('output.txt', 'w');
fprintf(f, 'n=%i\n', N);

for i=1:N
  rows = size(arrays{i}, 1);
  fprintf(f, '\nr=%i\n', rows);
  for j=1:rows
    fprintf(f, '%g ', arrays{i}(N, :));
    fprintf(f, '\n');
  end
end
fclose(f);