Justin Goeres

Oh boy oh boy oh boy! I'm in. Is there going to be any group transportation from the convention center?

There will not be any official transportation from the convention center (unless you want to help me pull strings inside NI? )

The options for getting to Scholz Garten will be some combination of the following:

• Walk -- everyone will be sweaty anyway and we can all use the hike
• Carpool -- anyone who will have a car and is willing to offer rides please post about it here (and tell me about it at the conference!)
• Taxi -- People sharing cabs in groups would be a pretty cheap way to get there.
• Is there an Austin bus system (the "Dillo" thing) that runs up that way? Austiners please advise!

That's the plan. Any ideas/suggestions for other options are certainly welcome!

All I know is any country that calls its national soccer team "The Socceroos" can count me as a fan.

A different friend of mine submitted it to Digg:

http://digg.com/gadg...popcorn_machine

I dugg it!

If you follow me on Twitter you might already know that a friend and I recently entered a Popcorn company's contest to make a video of the "most inventive way to pop this all-American snack." Our idea: Write a LabVIEW program to find #popcorn tweets on Twitter, drive an NXT-powered contraption to deliver popcorn to a popping machine, and create the world's first crowd-sourced Internet snack!

Gravity Waves?

Actually they're shockwaves of insight emanating from each reader as they progress through the book. These waves propagate outward spherically (the book cover is merely a 2d projection!) and intersect with the shockwaves produced by other readers, in places like LAVA.

What's interesting is that these waves have special properties.

First, the energy of any point on the wavefront is not a function of its distance from the origin. That's to say that the farther the wave travels and the more people it touches, the more total energy it carries.

Secondly, when multiple waves intersect at a given point, they always interfere constructively.

I went back and checked; I think Chris spelled the new Joey's name 'Elliott' (two 't's)

OH NOES! Argh. I could've sworn I copied & pasted.

Oops.

EDIT: Nevermind. I did use the correct spelling to generate the anagrams (like I said, I copied & pasted). I just typed it wrong at the top of my post.

Selected anagrams of Elliott Darcy Relf: (edit: fixed misspelled name in link text. the anagrams themselves are correct.)

Allow me to offer my most belated of deep congratulations, as well.

But what impresses me most is that you haven't let the new responsibilities of fatherhood get in the way of your true passion: (American) Football.

"Little-used backup quarterback Chris Relf accounted for three touchdowns, Anthony Dixon set the Mississippi State single-season rushing record and the Bulldogs upset No. 20 Mississippi 41-27 in the Egg Bowl on Saturday."

So congratulations on that, too!

Well.

This is what I get when I follow your instructions.

Interesting. What happens when you do a dir in that directory from a Windows Command prompt (like in my third screenshot)? Do the $, !, and/or # files sort above . and .. like I saw?

They are not phantom directories. They are shorthand for the current directory and the parent directory.

I'm aware of that, but they're "phantom" in the sense that they shouldn't be returned by the List Folders operation (and aren't, except on network shares). That's the issue.

(crossposted to NI Forums)

I'm seeing a behavior where LabVIEW's List Folder primitive returns incorrect results for a folder on a mapped network drive, if the folder contains a file whose name starts with any of:

(I suspect it's actually any ASCII character whose value is less than or equal to 0x2D, but some of those are illegal and/or unprintable).

OS: WindowsXP

LV Version: LabVIEW 8.6 and LabVIEW 2009

Steps to Reproduce

(1) Map a network drive to a drive letter (I'm not sure that a mapped drive is necessary, and the network drive in this demonstration is a samba share from a Linux system).

(2) Create a file in a directory on the network share from #1, e.g. "Z:\list-folder-bug\file.txt".

(3) Note that LabVIEW's List Folder function returns correct results when listing the folder you just created.

(4) Rename the file you created in #2 above, changing its name to !file.txt. (The key is that the filename must start with !, or any of the other characters listed above.)

(5) Note that LabVIEW's List Folder function now returns two elements in folder names that don't really exist.

Why This Is Important

This is important because these phantom directories "." and ".." are expanded to "current directory" and "parent directory," which means LabVIEW thinks that the target directory contains a copy of itself and its parent. This produces an infinite recursion when listing directory contents recursively. In particular, the OpenG function List Directory Recursively is affected by this bug and enters an infinite loop when run on the directory shown in #5.

Bonus Information

Note, also that the dir command at the Windows Command Prompt sorts the file list in an odd way for files that begin with the aforementioned characters, but only on network shares.

If you follow me on Twitter, you probably already know that I own the "metric system" lunchbox mentioned in this list of the worst lunchboxes ever. The article, however, only shows the front of the lunch box. There's 5 more sides to the Exciting World of Metrics. So I thought I'd post the other faces of the lunch box here.

Note: This was not a lunchbox I originally owned as a child. I bought it in a kitschy retro-70s-&-80s-crap store in downtown Portland a few years ago. Back in my elementary school years, I rolled with a sweet Return of the Jedi lunchbox, and then later on an even more awesome Dragon's Lair lunchbox.

Via a friend of mine, so don't blame me. I just ported it to LabVIEW .

You can't have a pointer to multiple arrays: it's possible to vary the decimated array sizes independently of one another, without another buffer allocation, by using the subset primitive.

I see. Well, then it's back to the drawing board .

There's no allocation shown even with all outputs wired.

Something to consider is that even though the original array has been decimated into N new arrays of M length, M is the same for every output array.

I have it in the back of my head that LabVIEW describes arrays in memory with a size (M), a pointer to the 0th element, and a step value (or something like that). Could it be that all the N decimated arrays are actually sharing literally the same M length value in the same register?

I somehow missed the dust-up over eHarmony not allowing people to be gay. CollegeHumor taught me something!

Name: LVOOP ImageMagick Interface

Submitter: Justin Goeres

Submitted: 02 Jul 2009

File Updated: 03 Jan 2011

Category: Machine Vision & Imaging

LabVIEW Version: 8.2

License Type: Lesser GNU Public

Copyright © 2007, Justin Goeres Engineering

All rights reserved.

AUTHOR:

Justin J. Goeres

--see readme file for contact information

DESCRIPTION:

This library provides an LVOOP-based interface to the powerful cross-platform ImageMagick image handling utility suite.

It supports all of the ImageMagick utilities and almost every command-line operator (over 200 of them) with support for custom user-specfied operators for the edge cases.

Several examples are included that demonstrate basic text & image creation, composition, and conversion in and out of LabVIEW (including VI icon creation).

GETTING STARTED:

The first thing you need to know about ImageMagick is that it has a pretty steep learning curve. Complicated things are complicated, and easy things are sometimes complicated, too. The Example VIs provided with the project are intended to give you a basic start on how to use the library, but you should expect to consult an ImageMagick Examples Page frequently.

COMPATIBILITY:

The library is written for cross-platform usage, but is currently limited to compatibility with Windows because I don't have any non-Windows LabVIEW machines to write the platform-specific code on. If you can help out with compatibility for other platforms, please contact me. I would LOVE to hear from you.

REQUIREMENTS:

A working Windows ImageMagick installation. Tested with ImageMagick v6.3.4-Q16. Almost certainly works with later versions, and probably with earlier versions back to at least v5.4.8. (Personal testimonials on this are welcome.)

REQUIRED minimum OpenG Packages:

oglib-error-2.3.2

oglib-lvdata-2.7.2

RECOMMENDED OpenG Packages: (used in examples, but not in the core functions)

oglib-file-2.8.1

oglib-array-2.5.1

KNOWN ISSUES:

Currently applications built against this library throw a litany of execution errors when run in the RTE. If you need to build these libraries into an application, please contact me and I will try to help you.

Functions for a few of the built-in pattern generators are not completely implemented. You can access them using a custom raw operator argument.

CHANGE LOG:

1.0.1: Fixed an incompatibility with ImageMagick 6.3.4 when using certain operators.

Added a better error message when ImageMagick can't be located under Windows.

(6/19/2007)

1.0.0: Initial release (06/18/2007)

Click here to download this file

Name: ImageMagick Batch Image Converter VI

Submitter: LAVA 1.0 Content

Submitted: 03 Jul 2009

File Updated: 03 Jul 2009

Category: Machine Vision & Imaging

LabVIEW Version: 7.1

Version: 1.0.1

License Type: Creative Commons Attribution 3.0

Potentially make this available on the VI Package Network?: Undecided

Copyright © 2006, Justin Goeres Engineering

All rights reserved.

Author:

Justin Goeres

--see readme file for contact information

Description:

This VI provides a simple batch image conversion interface to the ImageMagick 'convert' utility. It converts and resizes groups of images specified by the user (it was originally developed for organizing documentation screenshots).

Be warned that this is a pretty simple VI. It has basic error reporting & handling. It should serve as a starting point for people who want to explore the usage of ImageMagick with LabVIEW.

This VI is Windows-only (the registry lookup and calling syntax are OS-specific), but it would not be difficult to adapt to other OSes.

Requirements:

A working Windows ImageMagick installation.

Change Log:

1.0.1: bugfix (12/11/2006)

- Removed SCC .svn folders

1.0.0: Initial release (11/27/2006)

Click here to download this file

Can y'all do me a huge favor by helping to stuff an internet ballot box for me?

NPR (National Public Radio) did a story today about the worst wedding party songs ever. On the radio they requested that people go to their website and add their own "worst wedding song" stories, and the best ones would be selected to be read on the radio. Obviously this isn't a democratic vote and is driven by the producers, not hordes of random internet lurkers, but since there is a sort of "voting" component, can you please stuff the ballot box for me?

If you have 15 seconds to spare, do this:

1. Click this link.
   
2. Scroll to the bottom of the page and find my entry (posted by "Justin Goeres"). Right now it's near the top if you sort by "Most Recent".
   
3. When you find it, click the "Recommended" link next to it.
   

For reference, here's my story:

QUOTE

I was Best Man at a close friend's wedding a few years ago. It was a fortunate coincidence that he was getting married on his aunt & uncle's 35th wedding anniversary, so during the reception they recognized the aunt & uncle for their milestone, and had a special dance just for them. This was a very sweet gesture, and to make it more special(?) the DJ played a song for them by their favorite country artist, Garth Brooks.

The song the DJ selected was one of Mr. Brooks' #1 hits, "When The Thunder Rolls," which is a song about nothing less than a scorned wife who smells another woman's perfume on her cheating husband. And then gets a pistol and shoots him.

What made the experience even more surreal was that I was apparently the only person at the party who paid any attention to the lyrics. For the rest of the night I heard several other party-goers discussing what a great romantic song the DJ had chosen, and no one ever mentioned (maybe out of respect?!) what the song was really about.

And for the record, it's 100% true.

Thanks!

QUOTE (Black Pearl @ May 8 2009, 01:24 AM)

I've got both constants in 7.1

For loop: if you wire I to the outside (no indexing), you will get 0 if the loop iterates 0 and 1 times. Not so nice...

I agree that it's sort of counterintuitive at first, but what would you expect the result to be instead? Even though the For Loop executes zero times, there has to be a data value on the I wire coming out -- that's the nature of dataflow. In this case, what's happening is that wire is taking the default value of its datatype (I32), and that value is 0.

QUOTE (normandinf @ May 6 2009, 07:36 AM)

I'd say it a bug. What do other languages give for an answer? Can anybody try that in C or Java?

I asked a buddy of mine who's a C/Java programmer, and he said, "Null pointer exception."

(no, seriously, that's what he said.)

I Google'd for this briefly and came up empty. If I missed another place where this has been posted, accept my apologies!

If I take the logical AND of an empty array of booleans, the result is TRUE. I expected it to be FALSE.

By the same token, the logical OR of an empty array of booleans is FALSE, as I'd expect.

Is this a bug, or another instance where I'm misunderstanding the vagaries of IEEE math?

Attached VI: (LabVIEW 8.2) Download File:post-2992-1241621760.vi

QUOTE (angel_22 @ May 4 2009, 05:04 AM)

hi,

please i did search about labview dsc but without any result..

any person can help me ??

You can http://sine.ni.com/nips/cds/view/p/lang/en/nid/1010' target="_blank">get it from NI.