function displayLetter(n);
// Displays letter number n from file pattern1 
 pattern1=read('pattern1',26*12,13);
 letterVectors=matrix(pattern1', 12*13, 26);
 thisLetterVector=letterVectors(:,n);
 thisLetterArray=string(matrix(thisLetterVector,13, 12)');
 disp(thisLetterArray);
endfunction
