VI of the Day (10/26/2009) - Matrix Size

[Darin.K]

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Darren wrote:

Very cool tip...I was not aware of the Matrix Size function.  Perhaps I will steal borrow this tip for a future Darren's Weekly Nugget.  😉

I just benchmarked the two approaches, and it looks like Matrix Size is slightly slower than the Array Size -> Index Array approach, but unless you're calculating 2D array sizes in a very tight loop, it shouldn't make enough of a difference to account for the usability and real estate advantages of Matrix Size.

-D

Edit:  Whoa!  I just discovered that it works for *any* 2D array...it doesn't even have to be Numeric!  This may just be cool enough to be today's nugget.  🙂

Message Edited by Darren on 10-26-2009 01:04 PM

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Please feel free to borrow/steal/pilfer as I am having a hard time stopping myself from having a VIOTD on the Implies function.

[Darren]

Implies!  If this thing is true and this other thing is false, do something.  Otherwise, do something else.  A situation that comes up surprisingly often in LabVIEW.  You should definitely write a Function of the Day post about it... 😉

[Darin.K]

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Darren wrote:

Implies!  If this thing is true and this other thing is false, do something.  Otherwise, do something else.  A situation that comes up surprisingly often in LabVIEW.  You should definitely write a Function of the Day post about it... 😉

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Let me make sure I understand this implies thing:

If Title="VIOTD" is True and Misuse in Post is False, get off my case, otherwise, throttle me with my own mouse. 

You are right, that does come up fairly often.  

[Darren]

Alrighty, it's officially today's nugget.  Also, my previous comment about Matrix Size being slightly slower than Array Size appears to be unfounded...upon further benchmarking, it looks like Matrix Size might actually be a lot faster than the Array Size -> Index Array approach, I think because Array Size has to allocate an array for its output.  I'm pretty sure my previous benchmark had some constant folding trickiness that gave me bogus results.