Thread Subject: invalid file identifier

fcgr is my own function.
-------------------------------------
When I do :

files = dir('*.fasta');
for i =1 : numel(files)
     gene(i).fcgr = fcgr(files(i).name,1);
end

Everything works with NO porblems!
--------------------------------------
When I do :

files = dir('../AdifferentDirrectory/*.fasta');
for i =1 : numel(files)
     gene(i).fcgr = fcgr(files(i).name,1);
end

I get:
 ??? Error using ==> fread
Invalid file identifier. Use fopen to generate a
valid file identifier.

Error in ==> fcgr at 5
st=fread(fid,'uint8=>char'); % read the strings
--------------------------------------
I can't figure out why, does anybody have any ideas ??

"Juliette Salexa" <juliette.physicist@gmail.com> wrote in message <h06vu5$ma1$1@fred.mathworks.com>...
> fcgr is my own function.
> -------------------------------------
> When I do :
>
> files = dir('*.fasta');
> for i =1 : numel(files)
> gene(i).fcgr = fcgr(files(i).name,1);
> end
>
> Everything works with NO porblems!
> --------------------------------------
> When I do :
>
> files = dir('../AdifferentDirrectory/*.fasta');
> for i =1 : numel(files)
> gene(i).fcgr = fcgr(files(i).name,1);
> end
>
> I get:
> ??? Error using ==> fread
> Invalid file identifier. Use fopen to generate a
> valid file identifier.
>
> Error in ==> fcgr at 5
> st=fread(fid,'uint8=>char'); % read the strings
> --------------------------------------
> I can't figure out why, does anybody have any ideas ??

files(i).name just gives the file name not its full path. You could use fullfile to create the full file and path name.

HTH
Donn

Thank you Donn Shull.

I am also having problems with fopen.

filename=test.m
fopen(filename,'r')

works fine.
--
fopen(fullfile('directory1','directory2',filename,'r')) OR
fopen('directory1','directory2',filename,'r') OR
fopen(/directory1/directory2/filename,'r'))

do NOT. (the latter command works in UNIX but not windows).

So how do I open a file that's not in my working directory ??





"Donn Shull" <donn.shull.no_spam@aetoolbox.com> wrote in message <h0731h$bqc$1@fred.mathworks.com>...
> "Juliette Salexa" <juliette.physicist@gmail.com> wrote in message <h06vu5$ma1$1@fred.mathworks.com>...
> > fcgr is my own function.
> > -------------------------------------
> > When I do :
> >
> > files = dir('*.fasta');
> > for i =1 : numel(files)
> > gene(i).fcgr = fcgr(files(i).name,1);
> > end
> >
> > Everything works with NO porblems!
> > --------------------------------------
> > When I do :
> >
> > files = dir('../AdifferentDirrectory/*.fasta');
> > for i =1 : numel(files)
> > gene(i).fcgr = fcgr(files(i).name,1);
> > end
> >
> > I get:
> > ??? Error using ==> fread
> > Invalid file identifier. Use fopen to generate a
> > valid file identifier.
> >
> > Error in ==> fcgr at 5
> > st=fread(fid,'uint8=>char'); % read the strings
> > --------------------------------------
> > I can't figure out why, does anybody have any ideas ??
>
> files(i).name just gives the file name not its full path. You could use fullfile to create the full file and path name.
>
> HTH
> Donn