I have problem with using fopen

hello I try to create htk file using the following code

function ht_kwrite(filename, data, frate, feakind)

[ndim, nframes] = size(data);

filid=fopen(filename,'wb','ieee-be');

fwrite(filid,nframes,'int32');% number of frames

fwrite(filid, frate, 'int32'); % frame rate in 100 nano-seconds unit

fwrite(filid, 4 * ndim, 'short'); % 4 bytes per feature value

fwrite(filid, feakind, 'short'); % 9 is USER

fwrite(filid, data, 'float');

fclose(filid);

the problem is with using fopen when create file which always return filid=-1 (the file can not created )I dont know where the problem?

Answer 1

[Konstantinos Sofos]

Hi Ahmed,

Have you read the documentation for the function fopen ?

fileID = fopen(filename,permission,machinefmt,encodingIn) additionally specifies the order for reading or writing bytes or bits in the file using the machinefmt argument. The optional encodingIn argument specifies the character encoding scheme associated with the file.

what is the wb in your code?

Please try

filid=fopen(filename,'w','ieee-be');

or

filid=fopen(filename,'w','b');

In addition you can find an htk write function by Kamil Wojcicki in file exchange.

Regards

Answer 2

[Walter Roberson]

Using 'wb' is accepted as being equivalent to 'w' for compatibility with C programming.

The common reason for not being able to open a file for writing is that you do not have permission to write to the directory or file. You should be checking the result of the fopen()

[fid, errmsg] = fopen(filename, 'w', 'ieee-be');
if fid < 0
  error(sprintf('failed to open "%s" because "%s"', filename, errmsg));
end

[Jan]

Or without sprintf:

error('failed to open "%s" because "%s"', filename, errmsg);