Uniqueness of the array elements

Hi,
I've got the 1D array of the DBL values.
How to quickly check all of they are unique?

What happens if you're comparing two NaN entries in a numeric array?
Edit - by which I mean to say that, as usual, altenbach has a pretty good example of this - have a read through the comments here
CLD

Similar Messages

How to save the array elements

hi,every body
I need to save the array elements,for later use,can you tell me how?

here you go.
Message Edited by Root Canal on 10-21-2008 02:50 PM
global variables make robots angry
Attachments:
write some stuff and read some stuff.vi ‏47 KB
write some stuff and read some stuff.PNG ‏19 KB

How can I set the caption text of picture controls inside an array or how can I choose which array element is assigned using the array elements caption text property.

I have 8 picture controls inside an array and I would like to set the caption text of these controls.
I have used the property node of the array and used the array elements property caption text to set the text.
The problem is however that I set the same text to all the picture controls inside the array.
My question is how to set caption text of specific elements (Picture control) that I have so far only been able to access using the array elements caption text property.

Some more help
1 You could use the caption of the array and place it in front of the selected picture and update that using property nodes.
2 Like Norbett said if you use a cluster of pictures then their caption can be updated individually.
Here is a an example that demonstrates the above
David
Attachments:
Modify the Captions Of Pictures.vi ‏83 KB

How to use the array elements

Hi, i'm trying to automate a questionary using array.
// In the compositionReady for the stage
sym.actual = 0;
sym.arr = [ "Hi","Love","You" ]              // This is my question array.
sym.checkArr = function(){                  // this the function that i use to check whis question of the array i'm going to use.
          sym.Question = arr[actual];      // i want to use the value "Hi", and then increase my "actual" var and then use the value "Love"
// In my symbol timeline i use a trigger, in that trigger i use
sym.stop();
sym.quest = sym.getComposition().getStage().Question;         // I'm getting the Question value;
sym.$("Ask").html(quest );                                                         //"Ask" is an empty textfield;
sym.getComposition().getStage().actual ++;                    // Increase "actual" for the nex time.
But the code doesn't work, i think the problem is the way i use the array index.
Please help!
Thanks =)

Hi there,
chino_10 wrote:
in te timeline trigger why did you use a local variable?
It's good practice to use local variables whenever possible. The quest variable will only apply to that trigger, and it won't carry over to another trigger in the same timeline. So when using a trigger to set the HTML of a text element in the same timeline, I find it cleaner to assign a new HTML value from a local variable.
chino_10 wrote:
and if you are calling the global variable "actual" from de compositionReady handler why didn'y you call it with all the path like "sym.getComposition().getStage().actual ++;"?
I think maybe I didn't express it as clearly as I could have. When you declare sym.actual in compositionReady, you actually have declared a variable scoped to the main stage symbol - it's not a global variable. To declare a global variable (which is not always best practice), your code in compositionReady would be:
actual = 0;
This actual variable would now be accessible from any element/symbol in the composition simply by assigning a value to actual. You may see how this could quickly get messy.
So getting back to variable scope: if you declare a symbol variable using sym.varName, then any element in the same scope can call it using sym.varName. So your main timeline triggers can call it without using the full addressing of sym.getComposition().getStage().actual++. Instead, you could just use sym.actual++. Less code, and easier to read. But if you wanted to call it from another symbol (outside of the scope of the main stage), then you'd have to use the full addressing to actually address the variable, i.e., sym.getComposition().getStage().actual ++.
hth,
Joe

Why won't all the array elements display?

Hello,
I am trying to learn about manipulating arrays. The example finder includes this one," build array_forum.vi", which shows the two modes, concatenate and append, which I can understand, HOWEVER, I cannot figure out how they built this vi. For example, I can find the Build Array function, but, I cannot understand how they created the "array of numeric data 1" "array of numeric data 2"...etc, and I cannot find the functions on the palettes that result in the display "build array concatenate inputs". Where are these blue functions????
Where are these functions found on the palette, and how does one construct them like this?
The other vi shown here, "for loop array_forum.vi" is my attempt to duplicate it, but, it does not show all the elements of the array; instead it displays only ONE element, the last element of the array. How do I display all the elements of the array I am trying to create using the FOR LOOP? Am I doing something wrong with the FOR LOOP?
Thanks,
dave
Solved!
Go to Solution.
Attachments:
Build Array_forum.vi ‏12 KB
for loop array_forum.vi ‏7 KB

Hello Tim and Nilquist,
Thanks for your help. Let me re-state my question. I have studied the Labview basics, and I understand about REPRESENTATION, data types etc., but, take a look at the attached vi. In it, I have added an indicator, and the indicator I have added is called ARRAY by default, and it is the shape of a large box. The original indicators in the original example are small boxes are labelled I-32. Where did the original indicators come from? Is my indicator identical to the original ones? I am using LV2011 basic.
Thanks,
DAve
Attachments:
Build Array_forum_2.vi ‏12 KB

How can I do to share the array elements between "C" and "Java"

Hi,all
I want to implement the function about this: c and java between JNI can share the same data area. For example, when change the value of the array in java, i can get the same value in c.
I use the function:Xxx* GetXxxArrayElements(JNIEnv env, jarray array, jboolean isCopy)
But i find that the "isCopy" is JNI_TRUE which means that i get the pointer which point to a copy,so i can't get the change
in Java later.
How can I do?Can i set "isCopy" with JNI_FALSE??
Thank u.

No, you can't. isCopy is of type jboolean*, and the value is just set by the call to inform you whether the data was copied or not, but you cannot infulence that.
In fact, the VM might store an array of primitives in a different way as C, and this routine has to convert between the two representations. In this case copying is always required.

I can't see the Array element in actionscript after updating to latest nightly build

hey guys... so i have a small issue... i just updated to the latest nightlybuild, and for some reason i dont see Array as a datatype in the intelasence...
When i do type "var temp:Array = new Array()" then i dont get any errors... but when i do "temp. " i dont see any functions that relate to the array datatype... i was wondering if thats a bug? or if its something that was taken out??
oh, and i can't see Filereferencelist in the intelessence either...

Does everything compile fine and the super class of your webservice is valid and in your library path?
Please see my previous post about playerglobal.swc being read properly. You can verify this in a few different ways: compile, expand the SWC in package explorer, search in the open type dialog, etc.
PLEASE make sure you're in a clean workspace. As I said before, once FB Beta 2 caches the SDK, you can't effectively force builder to refresh the cache. You can surgically remove the cache by deleting the .metadata/.plugins/com.adobe.flexbuilder.codemodel folder or you can start in a clean workspace, modify your nightly SDK, add it to FB and create your project.
Jason San Jose
Quality Engineer, Flash Builder

How to set the value of an array element (not the complete array) by using a reference?

My situation is that I have an array of clusters on the front panel. Each element is used for a particular test setup, so if the array size is three, it means we have three identical test setups that can be used. The cluster contains two string controls and a button: 'device ID' string, 'start' button and 'status' string.
In order to keep the diagrams simple, I would like to use a reference to the array as input into a subvi. This subvi will then modify a particular element in the array (i.e. set the 'status' string).
The first problem I encounter is that I can not select an array element to write to by using the reference. I have tried setting the 'Selection s
tart[]' and 'Selection size[]' properties and then querying the 'Array element' to get the proper element.
If I do this, the VI always seems to write to the element which the user has selected (i.e. the element that contains the cursor) instead of the one I am trying to select. I also have not found any other possible use for the 'Selection' properties, so I wonder if I am doing something wrong.
Of course I can use the 'value' property to get all elements, and then use the replace array element with an index value, but this defeats the purpose of leaving all other elements untouched.
I had hoped to use this method specifically to avoid overwriting other array elements (such as happens with the replace array element) because the user might be modifying the second array element while I want to modify the first.
My current solution is to split the array into two arrays: one control and one indicator (I guess that's really how it should be done ;-) but I'd still like to know ho
w to change a single element in an array without affecting the others by using a reference in case I can use it elsewhere.

> My situation is that I have an array of clusters on the front panel.
> Each element is used for a particular test setup, so if the array size
> is three, it means we have three identical test setups that can be
> used. The cluster contains two string controls and a button: 'device
> ID' string, 'start' button and 'status' string.
>
> In order to keep the diagrams simple, I would like to use a reference
> to the array as input into a subvi. This subvi will then modify a
> particular element in the array (i.e. set the 'status' string).
>
It isn't possible to get a reference to a particular element within an
array. There is only one reference to the one control that represents
all elements in the array.
While it may seem better to use references to update
an element within
an array, it shouldn't really be necessary, and it can also lead to
race conditions. If you write to an element that has the
possibility of the user changing, whether you write with a local, a
reference, or any other means, there is a race condition between the
diagram and the user. LV will help with this to a certain extent,
especially for controls that take awhile to edit like ones that use
the keyboard. In these cases, if the user has already started entering
text, it will not be overwritten by the new value unless the key focus
is taken away from the control first. It is similar when moving a slider
or other value changes using the mouse. LV will write to the other values,
but will not rip the slider out of the user's hand.
To completely avoid race conditions, you can split the array into user
fields and indicators that are located underneath them. Or, if some
controls act as both, you can do like Excel. You don't directly type
into the cell. You choose w
hich cell to edit, but you modify another
location. When the edit is completed, it is incorporated into the
display so that it is never lost.
Greg McKaskle

How to change the color of Numeric array elements (seperately) programmatically using property node??

For example, i have 3 numeric controls, controlling 3 numeric array elements (Numeric control is connected directly to indicator). Then if i change value in numeric control 1, then the array element No.1 of numeric array should turn red when value exceeds 5. Similarly when i change num control 2 then element 2 of array should turns red when value in num control 1 exceeds 10. Similarly for 3rd element. In other words, i want to control the property of array elements individually through seperate numeric control.
I have done it for single numeric indicator.i.e. when i change numeric control's values then a single numeric indicator changes values and color (Numeric text BG property) but with array, the color of whole array changes but i want to change color of singles element of array.
Please help thanks.
Solved!
Go to Solution.

...or replace the numerics with clusters that have a numeric and a color box. make the background of the nmeric transparent and slide the color box behind the numeric. Use the color box to control the background color.
Other alternatives would use a cluster instead of the array or if your req's are really weird "roll-your-own" with a Picture control.
Ben
Ben Rayner
I am currently active on.. MainStream Preppers
Rayner's Ridge is under construction

Display a particular array element on the front panel

Hello,
I was wondering if it's possible to change which element of an array control is displayed on the front panel from within the program.
Here's why I want to do it: I have an array of clusters, each of which contains a set of controls. The controls in each cluster specify a bunch of different parameters for a few different instruments that are being controlled by Labview. The user changes all the values on the front panel before the program starts, then the program steps through the array elements one by one. I'd like to be able to change the array's display so that the user can know which set of parameters is active (and thus what is currently in force) while the program is going -- otherwise the element that is displayed is just wherever the user left it last.
Thanks in advance for any help.

See also: http://forums.ni.com/ni/board/message?board.id=170&view=by_date_ascending&message.id=317419#M317419
LabVIEW Champion . Do more with less code and in less time .

Build Array keeps name of the last element but not the others. Workaround?

Hi there,
Sorry if this has been posted before, I did the search first but did not find anything.
Problem is that I have two setups that are identical and need to be controlled from a single vi. Since they are the same they are configured with the same sets of parameters so I decided to create a cluster of these and then build an array of the clusters. This way I need to only use one wire and if I need a given parameter I can easily get it from there (or so I thought) and also since I need to see if anything changes I can compare one wire instead of each one of the parameters.
The gui has the list of parameters then in the block diagram I bundle them appropiately, using "Bundle by Name" and then each bundle into an array using "Build Array". Problem arises when I index the array for the first setup and the use that to unbundle the parameters I need, using "Unbundle by Name" (though if I use "Unbundle" the same happens)and lo and behol, the ouput names are from the second setup, not the first.
Here is the curious thing though, even though the names are all wrong the values are correct. I could live with this but it is annoying plus it will make another user very hard to understand the diagram plus this is just a proof of principle to test with two, eventually there will be eight or even more and that is going to get really confusing.
Is there a way around this? Even if it is to change the names after unbundled.
Check the attached vi to see what I mean.
Solved!
Go to Solution.
Attachments:
Test Build Array Names.vi ‏11 KB

I think you are forgetting an important point about arrays. The only thing that can be different between each element of an array is its value. The array elements must all share the same properties. So that would include the names of the individual elements that make up the cluster that is an array element.
It appears that the last cluster that gets built into the array is the one that defines the names of the elements that are within the cluster element. You either need to give all elements of the array the same names within the cluster. Or use a cluster of clusters instead of an array of cluster to build your data structure.

Reset Array element when i run the program once

Hi every body , i have seem many topic about reset the array element.but i can't do that well
I want to reset all the element inside the array to the " gray color " ( the condition when i reopen the VI )
once i run the program by clicking the buttom.
Is there any method ?
I have attached the pic for your reference
Thank You
Attachments:
array.jpg ‏13 KB

Post your VI with whatever method you did that you say doesn't work for you. You must have done something wrong and we won't know what until we see the code. Here is what it should look like.
Message Edited by Ravens Fan on 03-02-2009 11:00 PM
Attachments:
Example_VI_BD.png ‏2 KB

Swap the key focus at Array element

Hello,
Would you help me about the title query ? the details is in attachment. thanks @! LV7.1 version.
Attachments:
help.vi ‏40 KB

Attached is a quick example showing the basic method needed for a table.
An array is more complex, because to refer to a specific array element, you first have to resize the number of visible elements to 1, then use the Array Element>Reference and cast that reference to a cluster, and set the key focus to the right element of the cluster and then resize the array back to its display size. To avoid having the user see this, you need to use the Defer Panel Updates property, and this might cause the control to lose the focus, I'm not sure.
A side note is that using Value property nodes is not a good way of doing things. A local is usually better and using real data flow is even better.
Try to take over the world!
Attachments:
help mod 71.vi ‏63 KB

Problem in assigning value to an array element

hi all
in the following prog i am not able to assign the value to the array element
i am not getting why it is giving me error
//my program is as follows
public class ArrayTest
     static int [] intArray = new int[5];
     static int [] intArray1 = new int[1];
     intArray1[0] = 5; // this line gives error
     static char [] charArray = new char[5];
     public static void main(String args[])
          System.out.println(charArray);
          intArray1 = intArray;
}thanx in advance as usual

The problem is that you try to execute code outside a method. This can be only done in form of a variable declaration or as a static initilization block which will be executed once when the class is loaded:public class ArrayTest
     static int [] intArray = new int[5];
     static int [] intArray1 = new int[1];
     static char [] charArray = new char[5];
     static {
          intArray[0] = 5;
     public static void main(String args[])
          System.out.println(charArray);
          intArray1 = intArray;
}

Hi, how can i break the value for a row and column once i have converted the image to the array???????

Hi, I would like to know how can i break the value for a row and column once i have converted the image to the array. I wanted to make some modification on the element of the array at a certain position. how can i do that?
At the moment (as per attachhment), the value of the new row and column will be inserted by the user. But now, I want to do some coding that will automatically insert the new value of the row and the column ( I will use the formula node for the programming). But the question now, I don't know how to split the row and the column. Is it the value of i in the 'for loop'? I've tried to link the 'i' to the input of the 'replace subset array icon' , but i'm unable to do it as i got some error.
Please help me!
For your information, I'm using LABView 7.0.

Hi,
Thanks for your reply.Sorry for the confusion.
I manage to change the array element by changing the row and column value. But, what i want is to allow the program to change the array element at a specified row and column value, where the new value is generated automatically by the program.
Atatched is the diagram. I've detailed out the program . you may refer to the comments in the formula node. There are 2 arrays going into the loop. If a >3, then the program will switch to b, where if b =0, then the program will check on the value of the next element which is in the same row with b but in the next column. But if b =45, another set of checking will be done at a dufferent value of row and column.
I hope that I have made the problem clear. Sorry if it is still confusing.
Hope you can help me. Thank you!!!!
Attachments:
arrayrowncolumn2.JPG ‏64 KB

Uniqueness of the array elements

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