Rube Goldberg Code

[Ray.R]

Christian,

Your code is not an exact representation of the original code because it lacks the race condition with Real Matrix (or what gets displayed on the Intensity Graph)

😉

[altenbach]

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Ray.R wrote:

Your code is not an exact representation of the original code because it lacks the race condition with Real Matrix (or what gets displayed on the Intensity Graph)

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Yes, it is difficult to retain all bugs when fixing code ;).

Since the original loop had no wait and all code was limited to one loop, the race condition simply delayed the indicator update by one iteration or (in other units) by a few nanoseconds. 😮

If you think about it, a much larger "functional" difference was cause by the introduction of the wait statement....

[Ray.R]

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@altenbach wrote:

Since the original loop had no wait and all code was limited to one loop, the race condition simply delayed the indicator update by one iteration or (in other units) by a few nanoseconds. 😮

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not necessarily..

Imagine one iteration that runs the Intensity Graph display before the rest of the code, meaning it displays that of the last iteration.  Then in the next iteration, it runs the Intensity Graph AFTER the rest of the code, that would skip over one iteration of data.

It might be less likely to be the case, but not impossible.  😉

[altenbach]

Well, the intensity graph is updated asynchronously anyway. 😄

[Ray.R]

Good point - kudos -

🙂

[Ray.R]

seen here: http://forums.ni.com/t5/LabVIEW/EXE-not-writing-to-TDMS-files/td-p/1494646

[SteveChandler]

I don't know if this particular Rube has been posted. With hundreds and hundreds of replies there will be duplicates.

But this is a simple one and is very special to me:

Why?

I should know the answer because I wrote that code! But I honestly have no idea what I was thinking.

I have this folder called LabVIEW Historic (I have a habit of never deleting anything) which contains some of my very first code. I decided to dig around in there to see how far I have come. I found the oldest vi which was from 4/17/2002 - almost nine years to the day! This particular Rube jumped right out at me. And yes that is the actual control name!

[altenbach]

If you only have "LabVIEW extralite" you might be missing the NaN diagram constant and the "+1" primitive. Don't despair, there are ways around this limitation!!! 😄

(spotted here)

[Ben]

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@SteveChandler wrote:

I don't know if this particular Rube has been posted. With hundreds and hundreds of replies there will be duplicates.

But this is a simple one and is very special to me:

Why?

I should know the answer because I wrote that code! But I honestly have no idea what I was thinking.

I have this folder called LabVIEW Historic (I have a habit of never deleting anything) which contains some of my very first code. I decided to dig around in there to see how far I have come. I found the oldest vi which was from 4/17/2002 - almost nine years to the day! This particular Rube jumped right out at me. And yes that is the actual control name!

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Imagine yourself in a peacful palce with gentle breezes blowing. YOu can hear to gentle chirping on birds and you can see yourslef traveling back in time to the very moment you created that local. Could you have been trying to fix a broken arrow due to an un-wired local?

Ben

[SteveChandler]

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Ben wrote: Imagine yourself in a peacful palce with gentle breezes blowing. YOu can hear to gentle chirping on birds and you can see yourslef traveling back in time to the very moment you created that local. Could you have been trying to fix a broken arrow due to an un-wired local?

Ben

I think that the arrow should be broken if you wire a control to itself using a local variable. Or instead of a broken arrow the button should look like this

But thanks. The little birdies and gentle breeze did the trick. It is all coming back to me now and my confusion about LabVIEW is as clear as the day we met. I am somewhere deep inside a nested structure. It is dark and scary here. I need to read the value of Numeric but it is already connected to some other stuff at the top level.

What to do?

I know! I need a local variable. Any fool knows you can not read from a variable until you set the value.

Hey Ben can you snap your fingers or something and bring me back?