Ben Zimmer

Hey All,

I just posted a new entry on our LabVIEW Tip Jar Video Blog.

Excerpt: QUOTE

In this entry, I discuss and hopefully demystify some of the common data structures within LabVIEW, including arrays of clusters of arrays. New and novice LabVIEW programmers users are often introduced to the "bundle" function for the first time when they start plotting multiple sets of data on waveform graphs. It isn't always clear that you are in fact creating a cluster, nor is it clear why you sometimes use a 2-D array of numbers, and sometimes you bundle.

Click here to see the full article.

Regards,

Ben

QUOTE (mstoeger @ Sep 18 2008, 04:02 AM)

Hi,

I am looking for the best solution to first read continuousely multiple channels/multiple samples/waveforms all 1 seconds and build afterwards longer waveforms (for example 300 sec) - and the same again and again (as the program is doing unattended monitoring work).

In my opinion this is a very simple task, but the solution is not as trivial. I tried different ways, but these all seem to be a little bit complicated, therefore I ask for some good (and proven) ideas.

Thanks for your help

Martin

Martin,

This is one of my favourite questions!

I deal with this as a critical portion of our LabVIEW training material, and my favorite solution is to build a circular buffer storage mechanism with a functional global.

This is a bit of an advanced notion, but is a great solution to the question: how to acquire "essentially" forever. Once you wrap your mind around how to do this, I'd wager you use the circular buffer over and over in all of your projects. I know I do.

There's a snippet of the concept here:

All the best,

Ben

QUOTE (neB @ Aug 19 2008, 10:54 AM)

Seems like I struck a nerve with that question (and I wasn't even trying).

I am at a loss as to how that Q would be concidered descrimination. Could you please elaborate?

Ben

I would have to agree with Chris.

Consider two extremes: you have a huge student loan debt or you are independently wealthy. Do you want your employer to know this when they set your salary?

I like to ask:

- What is the coolest thing you've done with LabVIEW?

- What is the hardest thing you've done with LabVIEW?

- What is an insane object? How do you deal wth it?

- (I echo Bob's comment) Ask about typedefs.

- Relative adantages/disadvantages of enum vs. text ring

- What is a functional global? Describe how it works to store data.

- What is a memory leak? Describe a process for detecting one.

My personal favourite:

- Explain how you could write a DAQ application which continuously acquires and displays the last X seconds of data in a graph, and dumps that data to disk when either a button is pressed or a user-specified minimum votage level is received. X is limited only by the processor and RAM.

Hey All,

I just posted a new entry on our LabVIEW Tip Jar Video Blog.

Excerpt:QUOTE

Speaking from personal experience, problems with timing are among the most common sources of bugs for new LabVIEW programmers. I often hear complaints along the lines of: "I get this weird behavior, but when I run with Execution Highlighting turned on, it always works." Or, "I have to run my VI twice in order to get everything to initialize properly."

Click here to see the full article.

PS. I need to apologize now to those to whom I promised an RSS feed... I'm working on it.

PPS. No, you don't get a Wii for following this link.

Regards,

Ben

In my 14 years of LabVIEW programming, I think I've only twice needed to use a 3D Array.

I wanted to brag about the latest one, and see how others have used them.

In this case, I was working on a LabVIEW driver for a company which makes custom DAQ equipment. This particular device has an oversample mode, so that their DLL spits out data in a 1-D stream as follows:

1a 1b 1c 2a 2b 2c 1a 1b 1c 2a 2b 2c ...

where in this case: Xa, Xb, Xc are oversamples of channel X.

After fighting with some very complicated preinitialization and insert/replace ideas, I realized that this was a 3D array of data.

M = # repeats

N = # of channels

O = # of oversamples

I reshaped the 1D array to a 3D with inputs: M, N, O, then did a double nested indexing for loop with a Mean function at the centre.

Worked like a charm!

Anyone else regularly using 3+ dimension arrays?

Ben

Hey Tom,

Congrats again on winning the Wii. I'm glad you are enjoying it, especially after my risk to life and limb smuggling it in from Canada :ninja: ... I hope the French side of the instruction manual didn't confuse too much...

Personally, I think I have spent 99% of my Wii time playing Tennis. Strangely, my wife's favourite is also Boxing. Wonder what this tells us?!?

We also bought Rayman's Raving Rabbids. Ridiculous fun for the whole family.

Guitar Hero is also dangerously fun. Just don't injure your wiring hand! I knew when my carpal tunnel fired up on a quiet programming week, that I had my priorities a bit mixed up...

Enjoy the prize.

Ben Zimmer

www.lvmastery.com

Chris,

Thanks for organizing this again!

Really looking forward to it.

One thing you might want to do, is add a separate pay link for paying for a couple, so you don't have to go through payment twice if you are bringing your significant other.

Ben

We're excited to announce upgrades to our LabVIEW™ training website.

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Modules range in price from $199 to $399, and many include a full hour of online consulting.

Purchase only those modules which you need, when you need them.

Check it out at http://www.lvmastery.com/

Best Regards,

Ben

Ben Zimmer

President, Enable Training and Consulting, Inc.

For a free trial, please visit: www.lvmastery.com

mail: ben@enabletc.com

QUOTE (crelf @ Mar 14 2008, 10:39 AM)

:thumbup: Great job Ben!

Thanks.

And, by the way, RSS feeds will be live by the next posting.

Ben

Excerpt:

How many times have you checked to see if an array is empty, checked whether a file exists, or had an error while trying to save into a non-existent directory? Like me, you've probably written a handful of chunks of code over and over, repeating the same task. Your first tour around the OpenG toolkit will probably have you slapping your forehead saying, "Why didn't I ever write a SubVI for that?"

Please visit http://www.labviewmastery.com/TipJar2008-03-13

Best Regards,

Ben

Guys! Thanks for the kind words. I'm thrilled that I finally found the time to dedicate to the video blog that has so far only been heard by the other voices in my head.

I've had a lot of positivie feedback already, thanks!

As far as RSS feeds go: Jim, that is a great idea, and I will look into how nicely it plugs into the framework I'm using for labviewmastery.com. I will certainly leave the email subscription there as well. Personally, I prefer the email-based, but my goal is that people who want to see the content can easily see the content, so I don't mind doing both.

Cheers!

Ben

We've just added a video blog called the "LabVIEW Tip Jar" to our LabVIEW Mastery website.

The first posting is entitled: "Confessions of a LabVIEW Expert"

Please visit http://www.labviewmastery.com/tipjar

Best Regards,

Ben

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Wishing you a safe and Happy Holiday!

Sincerely,

Ben

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Ben Zimmer

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Ben Zimmer

President, Enable Training and Consulting, Inc

http://www.enabletc.com email: ben@enabletc.com

"Bringing YOUR Capabilities To Light"

Providing training, consulting, and contract programming services.

Specializing In: LabVIEW, test systems, data acquisition, control and automation, real-time systems, motion control, and machine vision.

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Hello List,

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Best Regards,

Ben Zimmer

President, Enable Training and Consulting, Inc

ben@enabletc.com

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* You Retain Ownership of All Code

Hello List,

Enable Training and Consulting is pleased to announce that the LabVIEW Mastery Beginner course is now online.

www.labviewmastery.com

Follow the link and register now for a free trial.

I'd like to express thanks to all of our beta-testers as well as everyone who has given valuable feedback.

Best Regards,

Ben Zimmer

President, Enable Training and Consulting, Inc

ben@enabletc.com

Video-Based Online Training

* Watch and Listen to Experienced Instructors

* Reduce Employee Downtime

* Outstanding Value

* Self-Paced

* Example-Based

* Search for Content and Examples

* Track Your Progress

* Expert-Moderated Online Forums

Online Consulting

* 5 FREE Hours of Consulting with Purchase of Intermediate Course

* Live, One-On-One Consulting and Advice from Proven Industry Experts

* Utilize Secure Online `See, and Share' Desktops

* Personalized Training

* Confidentiality

* You Retain Ownership of All Code

Very excited about this. Thanks for organizing it!

Did I miss the instructions on how to prepay?

Ben

Hi All,

Does anyone have information on whether it is possible to setup a login and password to restrict access to a remote panel?

I found the following article, but cannot make it work with LV8. I find that the G Web Server configuration doesn