How to calculate the number of appearance of each letter(A-Z ,a-z as well as '.' , ',' and ' ' ) in a text file in matlab?

Question

How can I go about doing this? So far I\'ve opened the file like this

fileID = fopen(\'hamlet.txt\'.\'r\');
[A,count] = fscanf(fileID, \'%s\');
fclose(fileID);