File Exchange Pick of the Week

September 9th, 2008

Advanced MATLAB: File name processing from directory listing

Very often MATLAB users want to be able to process a set of files from a directory. In this video, I show how you can look through a directory seeking files of the form “data###.dat” and then returning the “###” as a number with any leading zeros removed. This makes use of regular expressions, but does not explain their theory much at all.

Video Content

iconFiles.jpg

This is not the first time this kind of thing has been discussed. Check out Loren’s take, or Steve’s take from their blogs.

By Doug Hull

09:38 UTC | Posted in Advanced MATLAB, PodCast, Video | Permalink |

You can follow any responses to this entry through the RSS 2.0 feed. You can skip to the end and leave a response. Pinging is currently not allowed.

4 Responses to “Advanced MATLAB: File name processing from directory listing”

  1. david replied on September 9th, 2008 at 10:08 UTC :

    nice. just a thought:
    rather than trying ideas in the command window, one idea is to do this using the editor in cell mode. that way, when you’ve figured out the right syntax, you almost have a finished script. this also saves scrolling through the command history for the correct version of each command which after trial-and-error often look similar to versions that don’t quite work

    regards,
    david

  2. matt fig replied on September 9th, 2008 at 10:28 UTC :

    Off topic, but David’s reply made me think about an enhancement I would like to see. Imagine scrolling up through the command history, either through the editor or by using the up arrow. When you came across a command that caused an error, it would be in red font. Boy that would make life simpler when looking through several similar commands, some of which didn’t work.

  3. Doug replied on September 9th, 2008 at 10:30 UTC :

    David,

    Actually, I tend to do a little bit of both. It is hard to say when I work at the command line and then script and when I write a script and just keep running it as you add to it.

    Doug

  4. Doug replied on September 9th, 2008 at 10:35 UTC :

    Matt,

    That is an excellent suggestion. I just posted it to our internal enhancement tracking database. You can make such requests more reliably by e-mailing support@mathworks.com

    Thanks,
    Doug

Leave a Reply

Wrap code fragments inside <pre> tags, like this:

<pre class="code">
a = magic(3);
sum(a)
</pre>

If you have a "<" character in your code, either follow it with a space or replace it with "&lt;" (including the semicolon).

About

Bob, Brett & Jiro share their favorite user-contributed submissions from the File Exchange.

Subscribe


Recent Comments

  • Zach: Hi Doug and Les, I didn’t have a lot of time to mess with this, but I did find a work-around. I plotted...
  • hamed: k
  • Les: @Zach This isn’t exactly what you are looking for but at least it puts all three parameters on the same...
  • Zach: Thanks for your suggestions Doug. I’ll give that a shot and see what happens. I’ve seen many of...
  • Doug: @Zach, I would say to use plotYYY, because that is close to what you want, but using depth as Y makes sense....
  • Doug: @Teja, I think this will work: http://www.mathworks .com/access/helpdesk /help/techdoc/ref...
  • Gify: merry christmas :) nice christmas tree! Regards, Janet Gify
  • Teja: Dear Doug Is there anyway to plot a surface from nonuniform data without meshgrid and griddata? Basically i...
  • Zach: I’m working with geophysical data, so I’d like to produce a depth profile. The y-axis would be...
  • Doug: @Ashok First, please do not use variable names that are MATLAB commands (std and mean). Second, p(j) should be...

Blog Admin

These postings are the author's and don't necessarily represent the opinions of The MathWorks.