Grampa_of_Oliva_n_Eden

QUOTE(Aristos Queue @ Apr 10 2007, 01:18 AM)

...Read the .png file into a picture indicator. Now change that indicator to a constant. Easy as anything. ;-)

I just paste it. It works great for adding a diagraming illustrating the app design. And wht better way to dcoument LV that with a picture?

Ben

QUOTE(Tomi Maila @ Apr 9 2007, 02:46 PM)

Perhaps the trend is declining as LabVIEW is getting more stable and NI AEs don't need to google that many answers

Where is are the stars when you need them?

TO you!

Ben

QUOTE(eaolson @ Apr 9 2007, 02:16 PM)

Oh, I realize that. And I'm sure it's no coincidence that NI is headquartered in Austin. I just thought it was interesting that no other US cities were listed. So I'm wondering, is Austin in particular a hotbed of LabVIEW development, or are the NI folks themselves doing a whole lot of Googlin'?

Funny!

On more than one occation, I have sensed that support was Googling the answers.

Ben

http://forums.ni.com/ni/board/message?boar...8&jump=true

For those of you who know them, please feel free to let me know what I missed.

Thank you,

Ben

QUOTE(Nullllll @ Apr 5 2007, 02:11 PM)

thnx all , but I dont see logical solution!!

any help again

thnx all again

Before you can ask for a solution, you must cleary define the problem.

Please try again!

Ben

QUOTE(Tomi Maila @ Apr 5 2007, 01:19 PM)

Jim is a super- !

Tomi

Congratulations Jim!

Ben

QUOTE(crelf @ Apr 5 2007, 12:03 PM)

Nice image.

Reminds of a Luis Black routine were he talks about his head exploding after trying to figure out what someone meant when he over heard them saying "If it wasn't for that horse, I would not have spent that year in college."

Re: the original posting.

Do you want to

A) read the resistor color codes

B) match impeadance,

C) apply Ohms and Kertchov's voltage law to figure out what is in a blakc box?

Ben

QUOTE(Tomi Maila @ Apr 4 2007, 12:22 PM)

Sounds weird if this really is so. Shift register is just a memory address and queue is a asynchronous function. Or that's how I've understood it.

Tomi

Hi Tomi,

I found the thread where DF Gray mentioned the single element queue was faster and why.

See here.

http://forums.ni.com/ni/board/message?board.id=170&message.id=227377#M227377' target="_blank">http://forums.ni.com/ni/board/message?boar...=227377#M227377

I'll see if I can squeeze in some bench marks this week-end.

Ben

QUOTE(PJM_labview @ Apr 4 2007, 11:09 AM)

None that I know of. ...PJM

I have read posts by one of the NI guys that the queue version of the action engine will out perform the SR version.

I have not verified this myself but plaaned to check this myself, some day.

Ben

QUOTE(crelf @ Apr 3 2007, 06:57 PM)

Nicely done :thumbup:

Try as I may to pull the conversation up out of the muck and mire.... Well if you can't beat them join them.

This reminds of the time I was drinking beer with a Nazi in the 5th dimension when my G-string theory broke. I quickly reached fro ctrl-z to invoke a nearby worm hole but a concurrent rush by the 97.73% other that had stoped in from the 6th dimension (for a beer of course) resulted in me hitting ctrl-s and the next thing you know a jack-booted type was demanding I produce my papers or else subject myself to an immediate re-certification process. I tried to ctrl-r but it was too late.

It was not a good day.

Ben

QUOTE(Mike Ashe @ Apr 3 2007, 11:48 AM)

Is this an online web-based exam or it is onsite doxied?

Re: the certification tangent

Are we demonstrating Alfa's 97.73% theory ?

Ben

QUOTE(crelf @ Apr 2 2007, 02:09 PM)

I've got a bunch of come-backs, but none of them are witty enough...

Lacking something witty, how about something controversial.

I was watching a report on Georges visit to Walter Reade (sp?) and durring the tour they showed him that the recouperating service members have access to the web and I am convinced he said "It's nice to see they have access to Mac's.".

I know how Urs would feel about this but this raises the question "Does being a Mac user put you the 97.73% group?

Ben

QUOTE(Thang Nguyen @ Mar 30 2007, 02:19 PM)

I attach here the picture of creating the queue and destroy the queue.

Is the VI that creates the queue always in a run or reserved to run mode after they are created but before they are closed?

I am asking this because the error = 1 is invalid object. This will happen if the queue was already destroyed. Part of teh house keeping work done by LV is to keep track of resource that are allocated by each VI and releasing them when the VI goes idle.

So...

If the creators of the queues goes idle and or are unloaded form memory. LV will kiil the queue in your behalf.

Ben

QUOTE(BrokenArrow @ Mar 29 2007, 10:10 AM)

... And I'm on LabVIEW 102. Been there for 5 years....

Small world!

I studied French for five years in high school, never did pass French 2. Since no other classes would fit into my schedule, they decided that art class would satisfy the forign language requirement. I used to think that was funny before I found out about LV. Now my "other language" requires I draw picures!

"God work in mysterious ways"

Ben

QUOTE(Tomi Maila @ Mar 29 2007, 02:48 PM)

You must be right. I've not been using feedback nodes so I misunderstood the meaning of initialization node, I guess.

Tomi

So to summarize:

While loops seem to be faster and we will have to wait until Sunday to hear more from Jim.

Agreed?

Ben

QUOTE(Tomi Maila @ Mar 29 2007, 10:38 AM)

I didn't find the old tests but I quickly wrote new ones. They are attached. Feedback node was fastest, while loop second and for loop last.

Tomi

Tomi,

I am not sure (yet) if I trust these tests in the context of an action engine.

Ben

QUOTE(martin@aerodynamics @ Mar 29 2007, 03:47 AM)

Why is the "write" faster than the "read"?

These Q are generally best answered by looking at the code and examining the buffer re-use.

Are both the Control an Indicator on the root of the diagram?

Ben

QUOTE(LV Punk @ Mar 29 2007, 05:56 AM)

Be creative. You can't change the LV source code, but you can define your own units...

(LV 8.0)

What is it about engineers and scientist and they way they rise to the occation anytime some says "You can't..."?*

Lets see if I can harness this energy.

"You can't" do scripting in LV 8.2.

Anyone one like to prove me wrong?

Ben

* A support engineer told me "It over your head." about 25 years ago. I taught myself to program just to prove him wrong.

I do not remeber which verion of LV it was but I benchmarked the performance of the For vs While thinking that I could pick up some speed with the For loop.

To my suprise the While loop won.

Another point (that I was planning to cover in a future Nugget) is that AE do not have to limit themselves to a single iteration.

Example:

In order to "shoe-horn" an app into a FP 2000 I needed to be very careful with my memory usage. By using an AE that could call itself, all of the analysis could be performed with the data residing in the SR. It sorta works like a "state machine" with multiple entry states.

SInce the actual proccessing required depended on the data, I could not tell before the AE was called, how many steps would execute.

So...

Using a while loop allowed me to adapt without replacing the while with a for.

Just my thoughts,

Ben

QUOTE(BrokenArrow @ Mar 28 2007, 08:02 AM)

In 5+ years, I have never used the priority settings, aside from playing with them. I'll give that a try, thanks.

-Richard

To the best of my understanding "subroutine" priority is a pseudo-priority. It just tells LV "pull out all of the stops and run like he#$ !"

Ben

QUOTE(crelf @ Mar 27 2007, 03:55 PM)

clerf - that's a kinda cool name...

... but unfortunately you can not spell it with LV constants!

Ben

QUOTE(TiT @ Mar 27 2007, 08:54 AM)

I'm not trying to break any record... just to find out how not to suck up all the memory

I should have remebered I was talking to a second generation Wire-Worker.

Back in the old days....

Music was recorded on a vinyl disk by modulating the depth of cut of a spiral groove with the information that is to be recorded. The vinyl disks were called "records".

Very often the the records would get scratched or broken resulting in the probe ( a needle) following the crack or scratch rather the the spiral groove. When this happened the same inforamation would be read reapeatedly. It was common "back in the old days" to refer to someone that was repeating the same thing over and over again as a "broken record".

Related tidbit:

When a song gets "stuck in my head" I feel that I "have a scratch in the record of my brain." The part that stores "It's a Small World" is one of those areas.

Ben

QUOTE(TiT @ Mar 27 2007, 07:40 AM)

I now have the lastest ADO/MDAC and I added the modifications you suggested at "open connection".

the issue remain the same. The memory keeps increasing...

:headbang:

Broken record....

Is it LV or the DB that is eating up memeory?

Ben

QUOTE(BrokenArrow @ Mar 27 2007, 08:29 AM)

'Latch When Pressed' doesn't leave the button 'pressed in', showing the user that that thing has happened.

A "First Call" node would make sure the first call of this sub-VI would work correctly.

I generally use the event structure value change and then read the control to determine which type of change occurred.

Your version seems to be intended for a "polling" type architecture which requres my CPU but you know that already.

Just my thoghts,

Ben