Re: variable for directory in cd

[David Grundberg]

Blitz skrev:
> I'm trying to use the UNIX command "cd" to jump in and out of directories
> programmatically in Octave.  How do I use my variable in the cd command?
>
> trying...
>
> dirs = ls -d */
> for j = 1:length(dirs(:,1)),
>      cd dirs(j,:)   % line I'm having trouble with
>      % do stuff
>      cd ..
> end
>
> I'm running Octave 3.0.1 under Ubuntu
>
> thanks!
>   

You're calling cd with command call syntax. Can't reference variables 
then. You have to use expression statements if you want to use variable 
values.

So you're doing

   cd dirs(j,:)

which is evaluated as

   cd ("dirs(j,:)")

which won't work. You have to do it like this:

   cd (dirs(j, :))

Also, I'd recommend from moving away from

   dirs = ls -d */

and using

   dirs = dir ();

with extra logic instead. Return values from command calls aren't 
supported in 3.2 IIRC.

hth,
David