read multiple .pcm files from a directory

hey guys,i need some help here,well i have a main folder and there's inside him 2 subfolders each of it has 60 .pcm files..i have to open and read them using this code:

fid=fopen('filename.pcm','r');
sig=fread(fid,inf,'int16');
fclose(fid);

i use this command x=dir('mydirectory\*.pcm') and then i write

for i=1:length(x)
  y=x(i).name
end

the problem is when after this for loop write the command

fid=fopen('y','r')

matlab doesn't accept y as for my filename!any ideas???

thx in advance

Answer 1

[Walter Roberson]

http://matlab.wikia.com/wiki/FAQ#How_can_I_process_a_sequence_of_files.3F

You should be doing your processing of the file within your "for" loop: otherwise, each time through the loop, you over-write "y" with the latest x(i).name

Your open should be:

thisfile = ['mydirectory\' y];
fid = fopen(thisfile, 'r')

This is needed in order to account for the directory, and is also needed so that you do not try to open the file whose name is literally "y"