Re: variable for filename in fopen

[Carlo de Falco]

On 18 Jan 2010, at 22:11, Blitz wrote:

> I need to read a bunch of txt files in a directory.  For some  
> reason, fopen
> does not like passing a variable instead of an explicitly declared  
> string
> (i.e. "File1.txt").  The snippet below creates an array with file  
> names,
> then is supposed to open those files, one by one.  If I replace  
> 'reading'
> with some string, it works.  As far as I can tell, the variable  
> 'reading' is
> a string, so this should work.  Ideas?
>
>
>
> list = ls *.txt;
> for i = 1:length(list),
>    reading = list(i, :)
>    fid = fopen(reading, 'r') % open the file
>    % do stuff
> end;

have you actually tried to run this code in Octave? what Octave  
version are you using?
on what OS? for me (Octave 3.2.3 on OSX) the first line in your code  
is invalid and results in a parse error.
so I don't see how you can say that reading is a string...
what happens if you run your code and then type just  
'reading' (without the quotes) at the octave prompt and press return?
c.