How can I write a magic(5) matrix to a text file with special delimiters?

I want to a matrix in txt for with the delimeter %%%

Answer 1

[Chunru]

x = magic(5);
fid = fopen('test.txt', 'w');
fprintf(fid, '%f\n', x);  % try different format here
fclose(fid)

ans = 0

type('test.txt')

17.000000
23.000000
4.000000
10.000000
11.000000
24.000000
5.000000
6.000000
12.000000
18.000000
1.000000
7.000000
13.000000
19.000000
25.000000
8.000000
14.000000
20.000000
21.000000
2.000000
15.000000
16.000000
22.000000
3.000000
9.000000