Updating elements in my array

Hello
Im very new to Labview and this may seem like a trivial problem to some. But it is driving me crazy. I have an array that i want to display as a table. I want to be able to input into this table and be able to add rows or delete rows as i please. The problem is that if I enter a number in an element of the array and i add a row it blanks out whatever I had written. Attached is my code. I think there should be a simple solution to this coz i havent been able to find much online help to it.
Attachments:
test-1.vi ‏208 KB

The changes of the array values are not recorded in the shift register. You have to catch another event : the array value change, and pass the new array value to the right shift register.
CC
Chilly Charly (aka CC)
E-List Master - Kudos glutton - Press the yellow button on the left...

Similar Messages

In LabVIEW6i, is there a way to make particular elements of an array invisible while the others stay visible (without losing any element's info.)?

I have an array of clusters. Each cluster pertains to a certain oscilloscope I am controlling. There is another control which specifies which oscilloscopes I have "on".
If a particular oscilloscope is "on" I want its cluster to be VISIBLE in the array. If a particular oscilloscope is "off" I want its cluster to be INVISIBLE in the array.
How can I implement this in my program without losing ANY of the info. in my array?

I suggest to use two arrays; one for user interface holding the ON clusters,
and one for internal use holding all clusters. The diagram periodically
updates the internal array with user interface array data.
By INVISIBLE do you mean "skipped from the array" or displayed as an empty
placeholder? To hide an OFF cluster you could put in the cluster a flat
button boolean that is small and transparent when ON and large enough to
cover the whole cluster area (and other controls) when OFF.
Jean-Pierre Drolet
Scientech R&D
"mcmastal" a écrit dans le message news:
[email protected]..
> In LabVIEW6i, is there a way to make particular elements of an array
> invisible while the others stay visible (without losing any element's
> info.)?
>
> I have an array of clusters. Each cluster pertains to a certain
> oscilloscope I am controlling. There is another control which
> specifies which oscilloscopes I have "on".
> If a particular oscilloscope is "on" I want its cluster to be VISIBLE
> in the array. If a particular oscilloscope is "off" I want its
> cluster to be INVISIBLE in the array.
> How can I implement this in my program without losing ANY of the
> info. in my array?
LabVIEW, C'est LabVIEW

Can I Bind a Front Panel LED to a specific element in an array of booleans?

In LabVIEW 2010 I have a string of LEDs. I have and array of boolean values that contain the values that the LEDs should indicate.
What is the best way to connect the LEDs to elements in the array of booleans?
Can I Bind a Front Panel LED to a specific element in an array of booleans?
How is this done?
Can anyone show sample code?
Solved!
Go to Solution.

Imagine that you have an I/O card that provides 128, 256 or 1024 digital inputs and the requirement is to have an LED on the front panel to represent the state of each digital input. This frequently occurs.
Wiring that many digital inputs individually is a royal pain and then some !
It would make sense to have one shared variable as an array of Booleans that represents the status of all inputs and then use data binding instead of wiring each individually. The individually wiring would violate all recommendations on diagram size and fan out.
Frequently scanned For loops to update all of the LEDS would take alot of CPU time.
Wouldn't it be MUCH better if PSP could be used to update the LEDs whenever the data changed (as it is supposed to do) ?
In my case I have a LabVIEW Yaskawa servo driver that provides me information about 16 servo drives that may be connected. I have LEDs on the front panel to represent some of that status for each individual drive. But Yaskawa provides the information on the drives as an array of clusters of information for each drive, which I perform some business logic on and turn into shared array of Booleans to feed the LEDs (and some banks of switches as well).
Unfortunately LabVIEW does not seem to have any way to bind the LEDs (and Switches) to individual elements in the shared array of Booleans. It is just not that smart. Even with only several banks of 16 LEDs and Switches, wiring them individually using Decimate Array of Index Array functions is a royal pain and makes the block diagrams very large. It would be much worse and almost unreasonable to do if the size of the information was much larger.

Change properties of a cluster element withing an array of clusters

Hello all,
I have an array of cluster that is shaped as a line with different display elements.
A list or a tree wouldn't have made it, so I had to use a cluster and make a table.
The problem is that I want to change not only the text but also the text color.
Individually.
I found this :
http://www.ni.com/example/30904/en/
But it change the property in all the clusters in the array, not just the one I need.
Some people have the same problem :
http://forums.ni.com/t5/LabVIEW/Reference-to-Array-of-Clusters-with-an-array-element/td-p/1006427
http://forums.ni.com/t5/LabVIEW/Different-set-of-values-for-two-rings-in-an-array-of-clusters/m-p/10...
http://forums.ni.com/t5/LabVIEW/array-of-clusters-get-references-to-all-the-clusters/td-p/1079456
http://forums.ni.com/t5/LabVIEW/How-can-I-reference-the-properties-of-a-control-in-a-cluster-in/m-p/...
http://forums.ni.com/t5/LabVIEW/Writing-only-to-certain-cluster-elements-in-an-array-by/m-p/2200728
http://forums.ni.com/t5/LabVIEW/Update-Properties-Of-One-Control-In-An-Array/m-p/3015501
http://forums.ni.com/t5/LabVIEW/Array-of-clusters-and-in-the-cluster-is-a-bar-meter-how-can-I/m-p/15...
http://forums.ni.com/t5/LabVIEW/Property-node-of-a-control-inside-of-cluster-inside-an-array/m-p/946...
Obviously, while in a list/table or tree you can change the property of an individual
cell (font, color) you cannot do it within an array of cluster, by some sort of magic,
the property of a cluster element (font, color) are all linked together, hence rendering
the use of an array worthless.
A possible hack is proprosed by using control masking, setting one visible and the
other invisble, swapping their position, whatever. It's a hack you have to perform,
hence add another code to maintain.
Is that still the case or is there now a more official way to handle individual cluster
properties, not just its data ? After all that's a common real-life example that should
be handled by Labview. In my opinion.
David Koch
Solved!
Go to Solution.

altenbach wrote:
One of the elements could be a 2D picture indicator of about the same size. You can write text in any color using picture functions.
Here's what I had in mind. Seems to work just fine (I would fine-tune the font, picture border, etc. but this should get you started).
LabVIEW Champion . Do more with less code and in less time .
Attachments:
ColorText.png ‏13 KB
ColorText.vi ‏9 KB

How to create an array in one field and have another field display certain elements from that array?

I am making a form in Acrobat XI pro.
In one text field, I created an array of several elements. I want other text fields to display certain elements from that array. For instance, one field should display the 3rd element, another field should display the 13th element, etc.
The Javascript for making the array is very long, and so I don't want to have to re-calculate the array every single time (in order to reduce rendering time when I open the form on an iPad). This is why I'd like to only have to create the array once, and simply refer to it throughout the form.

What code are you using to update the array currently? Are you completely rebuiding it when an element changes, or just changing specific elements for certain fields? I'm still not sure what exactly you are trying to do, but something like this in a document level script will create your array:
var myArray;
// Call 'updateArray' to initialize array
updateArray();
function updateArray() {
     // Code here to create/update array
     myArray = new Array();
     myArray[0] = "Value 1";
     myArray[1] = "Value 2";
     myArray[2] = "Value 3";
Then, for each field that needs to update this array, you can add a call to 'updateArray()' in the appropriate event. This will rebuild the array completely; if you just want to update specific elements, then you can access them directly.

Shifting elements in multidementional array

Hello,
I'm working on a boardgame project which uses an int[][] to represent the board. The elements in this array are numbers which represent vehicles. The equal numbers are one vehicle. A vehicle can perform a step left/right, or a step up/down (if there is no other vehicle blocking the way of course).
I've read about the arraycopy method, but I don't know how to use it with an array of arrays.
So an example of the matrix would look like this:
111002
300502
344502
300500
000000
666000
After a step of one vehicle the matrix could be:
011102
300502
344502
300500
000000
666000
I need to get matrices for all possible moves, for all vehicles.
I couldn't find any documentation about the use of copyarray with an array of arrays. Hope someone can point me in the right direction.
Thanks in advance

Ceylor wrote:
Hello all,
thanks very much for the quick replies.
prometheuzz, I've read the topic you mentioned and your explanation is great. Your UML makes it very clear.You're welcome.
I allready use OOP as much as possible. In my project I use a playField class (the board, also GUI), a node class (extends from rectangle, a cell in the field), a vehicle class (contains a collection of nodes and some other properties), a class for my algoritm and a state class.Good to hear that.
The state class is used for storing all possible states of the playField. (ie all valid moves). These states are needed for a shortest path algoritm, and are not automatically a state the playField gets. Therefor I can't use the vehicles stored in the playField class because this class only contains the initial state of the game. The playField only get's updated when the algoritm is done and a shortest path is found. So would it be a good solution to store a collection of vehicles inside my state class?I'm don't quite follow you here, I'm afraid.
The thing I'm a bit worried about is that there can be a lot of states. When adding the vehicles to each state object, doesn't this slow things down?
...Don't worry about inefficient code too soon. First get your logic correct: check your algorithm against a small puzzle, ensure that it works. After that, try some larger puzzles to see if a solution is found within the required time frame. If it takes too long, only then adjust your algorithm.
Feel free to post back if you have any questions.
Good luck.

Plotting elements from an array in waveform chart

Hi all,
I am trying to plot a real time data by extracting single element from an array.
Problem is that, at some frequencies waveform chart plot perfect while at other frequencies it plots like a undersampled signals.
Any suggestions?
Attachments:
wfm.png ‏136 KB
wfm.vi ‏133 KB

The timing information comes from the data acquisition process, not the display. You should be able to get equally good display of timing information on a chart or a graph.
How many samples do you read at a time? How do you define "realtime"? Anything plotted on a graph or chart for the use of a human operator does not need to be updated more than about 10 times per second because the eye/mind system works at about that time scale. For humans a real time grahical update rate of 2 to 10 Hz is adequate. Then you will have 256 to ~51 new samples at each update.
Another issue is that both your graph and your plot have plot areas which are less than 200 pixels wide. If you supply more than [plot width] pixels to a graph or chart, LabVIEW will reduce the data to determine which pixels to plot. So your graph with 1000 X-axis values has that reduced to the 184 pixels across the width of the graph. So, regardless of the precision of the data, the "precision" of the display is limited to the number of pixels.
Lynn

Stopping while loop after last element of 2d array is passed through

I posted something similar to this before, but what I got didn't work. So this time I'll try to be more clear with what I am trying to do. What I have done is combine two 1d arrays into a 2d array, and am using it to run an experiment. I split the 2d array into a 1d array by column, and am trying to get the while loop that the array is in to stop after the last element of the array is indexed. I need to use a while loop because the array is constantly updating because the number of elements can be changed while the program is running. What I am having trouble with is getting the while loop to stop after the last element has run, because the last element is subject to change. Any ideas?
Thanks

I am trying to run a measurement using labview to control different instruments. The program is suppossed tp work in that it runs a measurement for each current setpoint inputed, for 1 magnetic field setpoint. So for example, if the magnetic field setpoint is 8000 gauss, and the two current setpoints are .00001 amp, and .0001 amp, it will run the meauserement twice for the 2 current setpoints for each magnetic field setpoint. What I am trying to do is that sometimes, I might have to edit the magnetic field setpoints while the program is running. I am having trouble with refreshing the magnetic field setpoints, which allows the user to input a new magnetic field setpoint while it is running.

Is there a way of determining what element in an array is being clicked on?

Hi all. I would like to setup an event to determine what element in an array is being clicked on/hovered over. I think I tried this before and found it wasn't working due to limitations of LV 7.0. If this code already exists, it would be great if I don't have to do a scavenger hunt for the solution.
I think one possibility I nixed was to use the refnum of the elements to determine which one it is. IIRC, this is not possible because the refnum of the element is for the edit box only.
The second possiblity is to get the on click event, and somehow determine which element in the array it is. This doesn't sound too difficult as it should be a simple calculation, but may get in to some hairryness based on if the indicies are visible or not, and if I am using a new or old array with new or old control (calc would change based on boarder size of the controls). I might just simplify it by removing indicies and using older control set which has minimal boarder size.
And just for fun, can I force a tool tip to show up?
Thanks all,
A
Using LV7.0 on WinXP.

blawson wrote:
Been bitten by LabVIEW wrote:
I think one possibility I nixed was to use the refnum of the elements to determine which one it is. IIRC, this is not possible because the refnum of the element is for the edit box only.
Using LV7.0 on WinXP.
This is indeed possible, at least in the newer versions I use.
Take the array refnum from the click event data terminal and get a reference to the array element. This refers to the element that was clicked, but you do need to work out how to get the index. My method is to use property nodes to get the screen position and size of the element and the screen position and size of the array, as well as the array's Visible Index property. For each direction, take the quotient of the relative position of the element (account for padding!) over the size of an element.
I suspect that taking the mouse coords and comparing to the array's sizes in pixels is similar, although I trust my method for events that don't have mouseclicks (what coords does Array:shortcut menu selection(User) return if you used the keyboard?)
Here's an old version I happened to have open. I've posted about this before, I suspect I have a clearer version in my gallery. I use this method in my example code contest entry to work out which square of the chessboard is clicked.
Thank you for that one!
I am currently "locked up behind a down-rev fence" (working an old app in an old version) so I had not heard of that.
Ben
Ben Rayner
I am currently active on.. MainStream Preppers
Rayner's Ridge is under construction

How do you assign multiple values to a single element in an array?

I'm probably not wording the question right.
I have an array, let's call it M[], and for each element in the array (we'll say M[1]), I need assign three integers: row, col and value.
I need to set it up so I can do something like this:
A.row = M[i].col;
A[i].col = M[i].row;
A[i].value = M[i].value;
The algorithm isn't what I need help with, it's assigning .col, .row and .value to an index of an array.
Please help if you can.

You are right. You did not word your question perfectly, but I still think I get what you want.
First of all: A single element in an array always has exactly one value. No more, no less.
But that's not a problem. The element in an array is either of a primitive type (boolean, byte, char, short, int, long, float, double) or it's a reference (to a Object, String, MyClass, ...).
You can simply write a class that holds your three values and create an array of that type:
public class SomeData {
public int row;
public int col;
public int value;
// somewhere else:
SomeData[] a = new SomeData[10];
a[0] = new SomeData();
a[0].row = 10;
a[0].col = 5;
a[0].value = 42;Note how you only assign a single value to the element (a[0]) itself. All other assignment actually go to fields of the object refered to by that element in the array.
Also note that in Java types (such as classes, interfaces, ...) should start with a upper-case letter, while variables (local variables, members, parameters) and method names should start with a lower-case letter.
Edit: I'm getting old ...

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.

Here's what I had in mind
Of course you can use as many colors as you want.
Message Edited by altenbach on 12-21-2005 04:53 PM
LabVIEW Champion . Do more with less code and in less time .
Attachments:
LEDarray.png ‏7 KB
ColorArray3.vi ‏23 KB

How to highlight a specific element of an array

I'm having some trouble selecting which element in an array has key focus. I want to be able to selectively highlight individual elements in an array of strings and set the key focus so that the user can immediately enter the text into that specific element.
I have been able to get "selection.start" and "selection.end" to work, but when I get a reference to "array element" it always returns a reference to the last element manually clicked. This way, I can only programatically highlight different elements by manually clicking on them, which somewhat defeats the purpose.
Does anyone know if this is possible, or if I need to move to tables or something else in order to give me this functionality?
I'm using LV 6.1
on W2k.
Thanks
Shane.
Using LV 6.1 and 8.2.1 on W2k (SP4) and WXP (SP2)

I had the problem that I would like to highlight more than one cell in a 2d array.
multicolumn listbox is very slow working with large data volumes so I had to use a 2d array instead, but then I lose the possibility to highlight.
The solution I used was to bundle a LAD and control an put this in the array, takes a bit more coding but works fine.
Attachments:
2d array with marker.vi ‏23 KB

How to pass a single element in an array to XSL from BPEL

In a bpel (2.0) process I have a for-each loop iterating through a list in the original input document. Within that loop I need to construct an input document for a call to a web service based on data in the current node of the list objects I am looping through.
Constructing the input document via BPEL assign activity copies within the for-each loop is an option but due to the complexity of that document I would prefer to use XSL. But I don't know how to pass the index information (ie. the for-each counter) into XSL and use it there (and I would prefer not to have to do so, since that will prevent use of the XSL GUI in jdev), so I would prefer to send the current node of the list as input to XSL instead.
Is it possible to pass a sub-section of an XML document (e.g. one node in the array) as input into XSL rather than the whole document? In other words, I would like to send the current array element from the original input document rather than the entire original input document because I will be using the data within that array element to create the web service input document.
Example:
<forEach parallel="no" counterName="i"
                     name="ForEachEntry">
              <startCounterValue>1</startCounterValue>
              <finalCounterValue>$numTimeEntries</finalCounterValue>
If I used the BPEL assign activity to populate the input document I would need lots of copies similar to this:
              <copy>
                  <from>$inputVariable.OteStgTimecardCollection/ns3:OteStgTimecard[1]/ns3:oteStgTimecardDetailCollection/ns3:OteStgTimecardDetail[$i]/ns3:origtransactionreference</from>
                  <to>$InvokeOteDetailAbsenceErrorStatusService_OteAbsenceDetailFailureService_InputVariable.OteAbsenceDetailFailureServiceInput_msg/ns19:OrigTransactionReference</to>
              </copy>
I would prefer to send the current list object as an input variable into an XSL transform:
     $inputVariable.OteStgTimecardCollection/ns3:OteStgTimecard[1]/ns3:oteStgTimecardDetailCollection/ns3:OteStgTimecardDetail[$i]
Is there syntax in bpel that would do that?
Thanks

You need use While Element and use Array like Element[number]
With While element you iterate <employee> node
and with Element[number] you can extract information from that node.
I wrote a BPEL that scan a XML file, the input is:
<cliente>
        <codigo>01</codigo>
        <nombre>Deiby Mauricio Gomez</nombre>
                <productos>
                        <producto>
                                <nombre>Camisa Polo</nombre>
                                <precio>50</precio>
                        </producto>
                        <producto>
                                <nombre>Pantalon Lona</nombre>
                                <precio>100</precio>
                        </producto>
                </productos>
        </cliente>
        <cliente>
        <codigo>02</codigo>
        <nombre>Julio Cesar Ayapan</nombre>
                <productos>
                        <producto>
                                <nombre>Camisa Polo</nombre>
                                <precio>50</precio>
                        </producto>
                </productos>
        </cliente>
In my BPEL I added up all article prices and after that I write to txt file the client and the Total.
Example:
Deiby Gomez, 150
Cesar Ayapan, 50
My while element is this (Please pay attention in bold words):
<while name="While1"
           condition="bpws:getVariableData('variable1')<=count(bpws:getVariableData('Receive1_input_files','body','/ns4:clientes/ns4:cliente'))">
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        <assign name="Assign1">
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            <from expression="sum(bpws:getVariableData('Receive1_input_files','body','/ns4:clientes/ns4:cliente[number(bpws:getVariableData("variable1"))]/ns4:productos/ns4:producto/ns4:precio'))"/>
            <to variable="Invoke1_process_InputVariable" part="payload"
                query="/ns5:process/ns5:cantidad"/>
          </copy>
          <copy>
            <from variable="Receive1_input_files" part="body"
                  query='/ns4:clientes/ns4:cliente[number(bpws:getVariableData("variable1"))]/ns4:codigo'/>
            <to variable="Invoke1_process_InputVariable" part="payload"
                query="/ns5:process/ns5:id"/>
          </copy>
        </assign>
        <invoke name="Invoke1" inputVariable="Invoke1_process_InputVariable"
                outputVariable="Invoke1_process_OutputVariable"
                partnerLink="ValidacionBancos2WS" portType="ns5:BPELProcess1"
                operation="process" bpelx:invokeAsDetail="no"/>
        <switch name="Switch1">
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            <bpelx:annotation>
              <bpelx:pattern>Si el cliente es aprobado</bpelx:pattern>
              <bpelx:general>
                <bpelx:property name="userLabel">Si Aprobado</bpelx:property>
              </bpelx:general>
            </bpelx:annotation>
            <sequence>
              <assign name="Assign4">
                <copy>
                  <from variable="Receive1_input_files" part="body"
                        query='/ns4:clientes/ns4:cliente[number(bpws:getVariableData("variable1"))]/ns4:codigo'/>
                  <to variable="Approved_Write_input" part="body"
                      query="/ns7:clientes/ns7:cliente/ns7:id"/>
                </copy>
                <copy>
                  <from variable="Receive1_input_files" part="body"
                        query="/ns4:clientes/ns4:cliente[number(bpws:getVariableData("variable1"))]/ns4:nombre"/>
                  <to variable="Approved_Write_input" part="body"
                      query="/ns7:clientes/ns7:cliente/ns7:nombre"/>
                </copy>
                <copy>
                  <from expression="sum(bpws:getVariableData('Receive1_input_files','body','/ns4:clientes/ns4:cliente[number(bpws:getVariableData("variable1"))]/ns4:productos/ns4:producto/ns4:precio'))"/>
                  <to variable="Approved_Write_input" part="body"
                      query="/ns7:clientes/ns7:cliente/ns7:total"/>
                </copy>
              </assign>
              <invoke name="Invoke2" inputVariable="Approved_Write_input"
                      partnerLink="fileAdapterWriteApproved"
                      portType="ns6:Write_ptt" operation="Write"
                      bpelx:invokeAsDetail="no"/>
            </sequence>
          </case>
          <otherwise>
            <sequence name="Sequence1">
              <assign name="Assign5">
                <copy>
                  <from variable="Receive1_input_files" part="body"
                        query='/ns4:clientes/ns4:cliente[number(bpws:getVariableData("variable1"))]/ns4:codigo'/>
                  <to variable="Rechazados_Write_input" part="body"
                      query="/ns9:clientes/ns9:cliente/ns9:id"/>
                </copy>
                <copy>
                  <from variable="Receive1_input_files" part="body"
                        query="/ns4:clientes/ns4:cliente[number(bpws:getVariableData("variable1"))]/ns4:nombre"/>
                  <to variable="Rechazados_Write_input" part="body"
                      query="/ns9:clientes/ns9:cliente/ns9:nombre"/>
                </copy>
                <copy>
                  <from expression="sum(bpws:getVariableData('Receive1_input_files','body','/ns4:clientes/ns4:cliente[number(bpws:getVariableData("variable1"))]/ns4:productos/ns4:producto/ns4:precio'))"/>
                  <to variable="Rechazados_Write_input" part="body"
                      query="/ns9:clientes/ns9:cliente/ns9:total"/>
                </copy>
              </assign>
              <invoke name="Invoke3"
                      inputVariable="Rechazados_Write_input"
                      partnerLink="fileAdapterWriteRechazados"
                      portType="ns8:Write_ptt" operation="Write"
                      bpelx:invokeAsDetail="no"/>
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          </otherwise>
        </switch>
        <assign name="Assign2">
          <copy>
            <from expression="''"/>
            <to variable="Invoke1_process_InputVariable" part="payload"
                query="/ns5:process/ns5:id"/>
          </copy>
          <copy>
            <from expression="bpws:getVariableData('variable1')+1"/>
            <to variable="variable1"/>
          </copy>
          <copy>
            <from expression="''"/>
            <to variable="Invoke1_process_InputVariable" part="payload"
                query="/ns5:process/ns5:cantidad"/>
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        </assign>
      </sequence>
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Unable to update elements 9 on windows 7, 64 bit system

i am unable to update elements 9 on my windows 7 computer

Welcome to the forum.
I assume that you are looking for an update for PrE 9. Is that correct?
In PrE>Help>About, what is the version showing?
Good luck,
Hunt

How can I change all Inf elements in an array to a specific value?

I would like to change all Inf elements in my array to -1. Basically, I am looking for something similar to the range and coerce function, except that I want all values above a certain value to be a specific negative value, rather than go to that value.
I could use a case structure and go through each element in the array, but I am hoping to find something more efficient.Any ideas?
Solved!
Go to Solution.

P@Anand wrote:
I would do that in this way.
Here's a simpler version...
There are only two ways to tell somebody thanks: Kudos and Marked Solutions
Unofficial Forum Rules and Guidelines
Attachments:
Replace in Array.png ‏4 KB

Updating elements in my array

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