Reading files from a directory [was Re: (no subject)]

[Helios de Rosario]

Hi. Sorry for having top-posted, I just noticed it after clicking
"send". I have re-edited the post with Jeff's and my answers in the
correct order now:

>>> On Tue, Jul 23, 2013 at 8:59 PM, Jeff <address@hidden>
wrote:
>>>
>>>>
>>>> I'm running in Linux. Linux usually lets you list files and pass
them
>>>> into programs, or pass the output of one program into another,
etc. Is
>>>> there a way to do that for Octave files, too?
>>>>
>>>> In other words, I want to program it so I can do something like
this
>>>> ls <select-specific-files> | makeGraph.m
>>>> where makeGraph.m would then execute in Octave and process each
file?
>>>> Can I do that in Octave? How?
>>>>
>>>>

>> On Tue, Jul 23, 2013 at 10:19 PM, Dmitri A. Sergatskov <
>> address@hidden> wrote:
>>
>>> Perhaps I misunderstood what you really want, but could you just
use
>>> glob()?
>>> Like :
>>>
>>> fl = glob("*Beta=0195*.csv");
>>> nfiles = rows(fl);
>>>
>>> for ii = 1:nfiles
>>>    u1 = csvread(fl{ii});
>>>    ...etc...
>>> endfor
>>>
>>> Dmitri.
>>> --
>>>


> On Tue, Jul 23, 2013 at 10:32 PM, Jeff <address@hidden>
wrote:
> 
>> Yes, I can just use glob(), but only if I had known about it! :D
(IOW:
>> Thanks).
>> J
>>
>>

>>> El día 24/07/2013 a las 4:42, Jeff <address@hidden>
escribió:
> ... well, with the one catch that I still have to modify my program
each
> run instead of just listing the files and piping them into my
program. But
> still, much easier than the way I was doing it.
> 
> 


If I understand well your question, perhaps you want use cellfun.

For instance, to put the contents of all the csv files in a cell
array:

fl = glob("*Beta=0195*.csv");
csvcontents = cellfun(@csvread, fl, 'UniformOutput', false);

Then, if you have a function "do_things_with_csv" that could be used
with the contents of a single csv file, you can repeat:

cellfun(@do_things_with_csv, csvcontents, 'UniformOutput', false);

Or encapsulate the process of reading the file and the rest of the
process in a single function, and call cellfun only once.

Helios De Rosario

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