Hello Amal,
After analyzing your code I realized that you have not properly stored the data in c (Wrong Order). You have to understand that fprintf function writes the data column wise and hence store the data in that order itself.
b=[1 2 3 4];
c=[b; b];
test=fopen('prova.txt','w');
fprintf(test,'%f %d\n', c);
fclose(test);
-Venkata Siva Krishna Madala
