Why is it so difficult to replace one element in an array?

Maybe I am missing something but it seems overly complicated to replace one element in an array.
I have a 3 Col 15 row array. Each column represents a board of IO and each row is a specic IO location on the board.
I have 4 arrays each that vary in lenth that represent 4 different IO types (i.e. AO, DO, AI, DI). I want to people to write them one by one in order to allow a map to be stored as a constant. In that way if the end user decides to change some of the IO around on me it is easy.
However I am not seeing an easy way to write to one specific element. Replace supset will only allow me to call out either row or column.. not both (this makes no sence to me).
I hope someone can help.
Thank you.

You can certainly replace a single element in a 2D array and specify row and column. Attach the code you are having problems with.
Attachments:
Replace Element.PNG ‏2 KB

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Can I replace several elements of an array within one time? The number of elements are not fixed

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I want to replace some elements of a 2D array, but the number of elements are not known beforehand. I dont want to do it with a loop, which may slow down the speed, and the update of elements will not happen simultaneously. The indexes of elements to be updated are not continuous. I wonder if there is a way to do that efficiently? Do I have to programme it in LabWindows/CVI? Thank you.
Best wishes,
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My blog Let's LabVIEW.

Use the replace elements function. For non-continuous replacements of of multiple elements you would nee to iterate at least the number of continous pieces.
For example:
1,2,3,4,5,6,7,8,9
Replace elements 1,2,5,6,8
You would need 3 iterations in which you can replace (1,2), (5,6) and (8).
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hi,
I have understood preferable choice is to initialise array first and replace elements in an array instead of inserting new element in an array e.g. in a while loop.
So I started to this evaluate since I have an application where I want to read lots of measurements from a txt file and display them in a XY graph. XY graph must show Y value and corresponding X value either red if it is out of range and in green if it is in range. I found a solution to do it with an array of clusters.
In attached example I have two different methdologies represented. My problem is that upper solution doesn't display content of all measurements. Can somebody tell me what I'm doing wrong ?
regards,
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Solved!
Go to Solution.
Attachments:
plot test 3.vi ‏19 KB

Petri wrote:
... using cluster with three elements was a method I found to put red and green dots in one XY graph, eg. Y=coordinateY, X(green)=NaN,X(red)=coordinateX. Perhaps there is a better way to display the data, but I couldn't find it.
That is an odd thing and makes little sense. Why three? four, five, etc are NOT supported, so what if you want more than one color? (in range, fail high, fail low?). For more detail see the discussion here.
In any case, reading all these values from a datafile and creating xy plots is trivial. I would recommend to use complex data. a single complex array will graph IM vs RE. For multiple plots, combine them using "build cluster array". No loops needed.
Here's a quick draft. Of course you need to decide if the data is in columns or rows, etc. so modify as needed.
LabVIEW Champion . Do more with less code and in less time .
Attachments:
plot2XY.PNG ‏7 KB

How can I change the properties of only one element in an array of booleans?

I'm displaying an array of booleans to my operators, with each boolean in the array representing some system status check. Some of these checks are critical and some are not, therefore I want some of these booleans to have a different color when in the TRUE state (Red for the critical ones and Yellow for the non-critical ones). I can change the boolean colors with a property node, but that effects every element in the array. Is there any way to change a property of an individual element in an array? I know that I could take the incoming array and break it into two arrays - one for critical and one for non-critical, but this system is replacing an older system and the operators are accustomed to seeing their indicator lights a certain way and I'm trying to replicate what they had exactly.

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Message Edited by altenbach on 12-21-2005 04:53 PM
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I had two files named graphics and I replaced one graphics file with another which was the wrong one. Can I undo my replacement? I move the wrong one, which was on my desktop into another one and that is when it as me if I wanted to replace the file.

I accidently replaced a file with another. Can I undo my action?
I had two files named graphics. One was on my desktop and another was within another file called solitarie. I move the one on my desktop (wrong file) into the solitarie file and was asked if I wanted to replace the graphics file in the solitarie folder (the correct one). I said yes accidently and then remembered that I had made a mistake. If I use undo, it only move the wrong file back to the desktop. Is there an undo of replace?

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Why is it so difficult to replace one element in an array?

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