How Do I Initialize an Array of Array Objects?

I have an NSMutableArray object that stores NSMutableArray objects.
For example
- (void)loadMainArray
NSMutableArray *tempAry = [[NSMutableArray alloc] init];
//mainArray defined in header
self.mainArray = tempAry;
self.mainArray = [self loadSubArrays];
[tempAry release];
- (NSMutableArray *)loadSubArrays
NSMutableArray *tempAry = [[NSMutableArray alloc] init];
self.subArray = tempAry; //subArray defined in header
[tempAry release];
//populate subArray with data using [subArray addObject:blah]
return self.subArray;
This works perfectly when first running the app. Each successive call however to loadMainArray fails, causing a “EXCBADACCESS” error. I'm assuming that once that mainArray is populated, it isn't as easy as just re-assigning it. I have tried running through the array and removing the objects one by one. That doesn't work. I have tried re-initializing the entire array (as shown)...doesn't work...I'm stuck...any ideas what might be the problem?
If it helps, this is how I have defined mainArray and subArray in my headers:
NSMutableArray *mainArray;
@property (nonatomic, retain) NSMutableArray *mainArray;

mnemonic_fx wrote:
Why do it in such a inconvenient way ?
- (NSMutableArray *)loadSubArrays
self.subArray = [NSMutableArray array]; //subArray defined in header
// populate subArray with data using [subArray addObject:blah]
return self.subArray;
- (void)loadMainArray
//mainArray defined in header
self.mainArray = [NSMutableArray arrayWithArray:[self loadSubArrays]];
Message was edited by: mnemonic_fx
Unfortunately, this gives the same exact error. Just to be a bit more clear, my mainArray consists of n subArray objects. Each subArray object consists of m objects. (where 'n' and 'm' are variable depending on the data I'm loading)
When I first launch my app, my mainArray object loads just fine. However, when I try to alter my mainArray object in ANY way once it is populated, it crashes with the above error. I have tried to manually go through and do a replaceObjectAtIndex for each individual element. I have tried to just release the entire array, I have tried to call my loadSubArray method which returns a full new list. I'm not finding any debug info that is helping me with the issue.
any info would be great!

Similar Messages

How do I initialize an array after getting xml data via httpservice?

I am having a problem trying to initialize an array with data from an external xml file obtained via httpservice. Any help/direction would be much appreciated. I am using Flex 4 (Flash Builder 4).
Here is my xml file (partial):
<?xml version="1.0" encoding="UTF-8" standalone="yes"?>
<Root>
    <Row>
        <icdcodedanddesc>00 PROCEDURES AND INTERVENT</icdcodedanddesc>
    </Row>
    <Row>
        <icdcodedanddesc>00.0 THERAPEUTIC ULTRASOUND</icdcodedanddesc>
    </Row>
    <Row>
        <icdcodedanddesc>00.01 THERAPEUTIC US VESSELS H</icdcodedanddesc>
    </Row>
    <Row>
        <icdcodedanddesc>00.02 THERAPEUTIC ULTRASOUND O</icdcodedanddesc>
    </Row>
</Root>
Here is my http service call:
<s:HTTPService id="icdcodeservice" url="ICD9V2MergeNumAndDescNotAllCodes.xml"
                       result="icdcodesService_resultHandler(event)" showBusyCursor="true" />
(I have tried resultFormat using object, array, xml).
I am using this following Tour de Flex example as the base -http://www.adobe.com/devnet-archive/flex/tourdeflex/web/#docIndex=0;illustIndex=1;sampleId =70500
and updating it with the httpservice call and result handler. But I cannot get the data to appear - I get [object Object] instead. In my result handler code I use "icdcodesar = new Array(event.result.Root.Row);" and then "icdcodesar.refresh();".
The key question is: How to I get data from an external xml file into an array without getting [object Object] when referencing the array entries. Thanks much!
(Tour de Flex example at http://www.adobe.com/devnet-archive/flex/tourdeflex/web/#docIndex=0;illustIndex=1;sampleId =70500 follows)
<?xml version="1.0" encoding="utf-8"?>
<s:Application xmlns:fx="http://ns.adobe.com/mxml/2009"
               xmlns:s="library://ns.adobe.com/flex/spark"
               xmlns:mx="library://ns.adobe.com/flex/mx"
               xmlns:local="*"
               skinClass="TDFGradientBackgroundSkin"
               viewSourceURL="srcview/index.html">
    <fx:Style>
        @namespace s "library://ns.adobe.com/flex/spark";
        @namespace mx "library://ns.adobe.com/flex/mx";
        @namespace local "*";
        s|Label {
            color: #000000;
    </fx:Style>
    <fx:Script>
        <![CDATA[
            import mx.collections.ArrayCollection;
            private var names:ArrayCollection = new ArrayCollection(
                ["John Smith", "Jane Doe", "Paul Dupont", "Liz Jones", "Marie Taylor"]);
            private function searchName(item:Object):Boolean
                return item.toLowerCase().search(searchBox.text) != -1;
            private function textChangeHandler():void
                names.filterFunction = searchName;
                names.refresh();
                searchBox.dataProvider = names;
            private function itemSelectedHandler(event:SearchBoxEvent):void
                fullName.text = event.item as String;
        ]]>
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    <s:layout>
        <s:HorizontalLayout verticalAlign="middle" horizontalAlign="center" />
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            <s:HorizontalLayout horizontalAlign="center"
                                paddingLeft="10" paddingRight="10"
                                paddingTop="10" paddingBottom="10"/>
        </s:layout>
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            <s:Label text="Type a few characters to search:" />
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        </s:HGroup>
        <mx:FormItem label="You selected:" >
            <s:TextInput id="fullName"/>
        </mx:FormItem>
    </s:Panel>
</s:Application>

Hello,
Instead of extracting the first zero element from the vid array, you should take that out and connect it allone.
Attachments:
init.bmp ‏339 KB

How to create an collection/array/object/thingy from a bunch of objects for eventual export to CSV.

This is a follow-up to an earlier post (How
to output a bunch of variables into a table.) Now that I can ouput data for a single computer I need to to do the same for a list of computers into a CSV. In more general terms how do I get a bunch of $Computer objects into a single collection/array/object/thingy
with a clever name like $Computers?
# http://ss64.com/ps/get-wmiobject-win32.html
# http://social.technet.microsoft.com/Forums/en-US/da54b6ab-6941-4e45-8697-1d3236ba2154/powershell-number-of-cpu-sockets-wmi-query?forum=winserverpowershell
# http://serverfault.com/questions/10328/determine-cpu-processors-vs-sockets-though-wmi
# http://social.technet.microsoft.com/Forums/windowsserver/en-US/8443fcfd-5a0b-4c3d-bda7-26df83d2ee92/how-to-output-a-bunch-of-variables-into-a-table?forum=winserverpowershell
Param(
[Parameter(Mandatory=$false,ValueFromPipeline=$true)]
[string]$ComputerName = $env:COMPUTERNAME,
[Parameter(Mandatory=$false,ValueFromPipeline=$false)]
[ValidateScript(
If ( $_ -ne $null ) { Test-Path $_ }
[String]$ComputerListFile
Function Get-Computer
Param(
[string]$ComputerName
$Win32_PingStatus = $null
$Win32_PingStatus_Result = $null
$Win32_OperatingSystem = $null
$Win32_Processor = $null
$Win32_PhysicalMemory = $null
$Win32_ComputerSystem = $null
$Win32_BIOS = $null
$Computer = $null
$Win32_PingStatus = "select * from Win32_PingStatus where address = '$ComputerName'"
$Win32_PingStatus_Result = Get-WmiObject -query $Win32_PingStatus
If ( $Win32_PingStatus_Result.protocoladdress )
"$ComputerName ping succeeded."
$Win32_OperatingSystem = Get-WmiObject Win32_OperatingSystem -computer $ComputerName -ErrorAction SilentlyContinue
If ( $Win32_OperatingSystem -eq $null)
"$ComputerName WMI failed."
} Else {
"$ComputerName WMI succeeded."
$Win32_Processor = [object[]]$(Get-WmiObject Win32_Processor -computer $ComputerName)
$Win32_PhysicalMemory = [object[]]$(Get-WmiObject Win32_PhysicalMemory -computer $ComputerName)
$Win32_ComputerSystem = Get-WmiObject Win32_ComputerSystem -computer $ComputerName
$Win32_BIOS = Get-WmiObject Win32_BIOS -computer $ComputerName
$Computer = New-Object -Type PSObject -Property @{
Name = $Win32_OperatingSystem.CSName
Win32_BIOS_SerialNumber = [string]$Win32_BIOS.SerialNumber
Win32_ComputerSystem_Manufacturer = [string]$Win32_ComputerSystem.Manufacturer
Win32_ComputerSystem_Model = [string]$Win32_ComputerSystem.Model
#Win32_ComputerSystem_NumberOfLogicalProcessors = [int32]$Win32_ComputerSystem.NumberOfLogicalProcessors
#Win32_ComputerSystem_NumberOfProcessors = [int32]$Win32_ComputerSystem.NumberOfProcessors
Win32_ComputerSystem_TotalPhysicalMemory = [long]$Win32_ComputerSystem.TotalPhysicalMemory
Win32_ComputerSystem_TotalPhysicalMemory_GB = [float]($Win32_ComputerSystem.TotalPhysicalMemory / (1024*1024*1024))
Win32_OperatingSystem_Caption = [string]$Win32_OperatingSystem.Caption
Win32_OperatingSystem_CSName = [string]$Win32_OperatingSystem.CSName
#Win32_OperatingSystem_OSArchitecture = [string]$Win32_OperatingSystem.OSArchitecture
#Win32_OperatingSystem_SerialNumber = [string]$Win32_OperatingSystem.SerialNumber
Win32_OperatingSystem_ServicePackVersion = [string]$Win32_OperatingSystem.ServicePackMajorVersion + "." + [string]$Win32_OperatingSystem.ServicePackMinorVersion
Win32_PhysicalMemory_Capacity = ($Win32_PhysicalMemory | ForEach-Object { $_.Capacity } | Measure-Object -Sum).sum
Win32_PhysicalMemory_Capacity_GB = (($Win32_PhysicalMemory | ForEach-Object { $_.Capacity } | Measure-Object -Sum).sum / (1024*1024*1024))
Win32_Processor_Count = [int]$Win32_Processor.Count
Win32_Processor_NumberOfCores = [string]$Win32_Processor[0].NumberOfCores
Win32_Processor_NumberOfLogicalProcessors = [string]$Win32_Processor[0].NumberOfLogicalProcessors
#Win32_Processor_Description = [string]$Win32_Processor[0].Description
Win32_Processor_Manufacturer = [string]$Win32_Processor[0].Manufacturer
Win32_Processor_Name = [string]$Win32_Processor[0].Name
} ## end new-object
$Computer
} Else {
"$ComputerName ping failed."
$ComputerNameMgmt = $ComputerName + "-mgmt"
$Win32_PingStatus = "select * from Win32_PingStatus where address = '$ComputerNameMgmt'"
$Win32_PingStatus_Result = Get-WmiObject -query $Win32_PingStatus
If ( $Win32_PingStatus_Result.protocoladdress )
"$ComputerNameMgmt ping succeded."
} Else {
"$ComputerNameMgmt ping failed."
"$(Get-Date -Format o) Starting script $($MyInvocation.MyCommand.Name)"
If ( $ComputerListFile -eq $null -or $ComputerListFile.Length -eq 0 )
"Processing computer $ComputerName"
Get-Computer( $ComputerName )
} Else {
"Processing computer list $ComputerList"
$ComputerList = Get-Content $ComputerListFile
$Computers = @{}
$Results = @()
ForEach( $ComputerListMember in $ComputerList )
"$(Get-Date -Format o) $ComputerListMember"
# Get-Computer( $ComputerListMember ) | Add-Member -InputObject $Computers -MemberType NoteProperty -Name $_
# http://social.technet.microsoft.com/Forums/windowsserver/en-US/e7d602a9-a808-4bbc-b6d6-dc78079aafc9/powershell-to-ping-computers
# $Compuers += New-Object PSObject -Property $Props
# $Computers += New-Object PSObject -Property Get-Computer( $ComputerListMember )
Get-Computer( $ComputerListMember )
"$(Get-Date -Format o) Ending script $($MyInvocation.MyCommand.Name)"
If I try something like this:
Get-Computer( $ComputerListMember ) | Add-Member -InputObject $Computers -MemberType NoteProperty -Name $_
I get the following, even though $_.Name is not null.
Add-Member : Cannot bind argument to parameter 'Name' because it is null.
At <path to my script>Get-Hardware_Memory_OSVersion_CPU_Cores_ver04_sanitized.ps1:111 char:107
+ Get-Computer( $ComputerListMember ) | Add-Member -InputObject $Computers -MemberType NoteProperty -Name <<<< $_
+ CategoryInfo : InvalidData: (:) [Add-Member], ParameterBindingValidationException
+ FullyQualifiedErrorId : ParameterArgumentValidationErrorNullNotAllowed,Microsoft.PowerShell.Commands.AddMemberCommand
Or if I try this:
$Computers += New-Object PSObject -Property Get-Computer( $ComputerListMember )
I get this:
New-Object : Cannot bind parameter 'Property'. Cannot convert the "Get-Computer" value of type "System.String" to type "System.Collections.Hashtable".
At <path to my script>Get-Hardware_Memory_OSVersion_CPU_Cores_ver04_sanitized.ps1:114 char:47
+ $Computers += New-Object PSObject -Property <<<< Get-Computer( $ComputerListMember )
+ CategoryInfo : InvalidArgument: (:) [New-Object], ParameterBindingException
+ FullyQualifiedErrorId : CannotConvertArgumentNoMessage,Microsoft.PowerShell.Commands.NewObjectCommand

Hi Aenagy,
If you want to combine all the computers' information to a single array, and add the property computername in the output, please also try the script below, which I make a little modification of the function Get-Computer, pleaese make sure the account running
the script has the admin permission of the remote computers, or you need to privide cridentials in get-wmiobject, also note I haven't tested:
$output = @()#to output information of the all the computers
ForEach( $ComputerName in $ComputerList ){#loop all the computers
$Win32_PingStatus = "select * from Win32_PingStatus where address = '$ComputerName'"
$Win32_PingStatus_Result = Get-WmiObject -query $Win32_PingStatus
If ( $Win32_PingStatus_Result.protocoladdress )
"$ComputerName ping succeeded."
$Win32_OperatingSystem = Get-WmiObject Win32_OperatingSystem -computer $ComputerName -ErrorAction SilentlyContinue
If ( $Win32_OperatingSystem -eq $null)
"$ComputerName WMI failed."
Else {
"$ComputerName WMI succeeded."
$Win32_Processor = [object[]]$(Get-WmiObject Win32_Processor -computer $ComputerName)
$Win32_PhysicalMemory = [object[]]$(Get-WmiObject Win32_PhysicalMemory -computer $ComputerName)
$Win32_ComputerSystem = Get-WmiObject Win32_ComputerSystem -computer $ComputerName
$Win32_BIOS = Get-WmiObject Win32_BIOS -computer $ComputerName
$Computer = New-Object -Type PSObject -Property @{
Computername = $ComputerName #add the property computername
Name = $Win32_OperatingSystem.CSName
Win32_BIOS_SerialNumber = [string]$Win32_BIOS.SerialNumber
Win32_ComputerSystem_Manufacturer = [string]$Win32_ComputerSystem.Manufacturer
Win32_ComputerSystem_Model = [string]$Win32_ComputerSystem.Model
#Win32_ComputerSystem_NumberOfLogicalProcessors = [int32]$Win32_ComputerSystem.NumberOfLogicalProcessors
#Win32_ComputerSystem_NumberOfProcessors = [int32]$Win32_ComputerSystem.NumberOfProcessors
Win32_ComputerSystem_TotalPhysicalMemory = [long]$Win32_ComputerSystem.TotalPhysicalMemory
Win32_ComputerSystem_TotalPhysicalMemory_GB = [float]($Win32_ComputerSystem.TotalPhysicalMemory / (1024*1024*1024))
Win32_OperatingSystem_Caption = [string]$Win32_OperatingSystem.Caption
Win32_OperatingSystem_CSName = [string]$Win32_OperatingSystem.CSName
#Win32_OperatingSystem_OSArchitecture = [string]$Win32_OperatingSystem.OSArchitecture
#Win32_OperatingSystem_SerialNumber = [string]$Win32_OperatingSystem.SerialNumber
Win32_OperatingSystem_ServicePackVersion = [string]$Win32_OperatingSystem.ServicePackMajorVersion + "." + [string]$Win32_OperatingSystem.ServicePackMinorVersion
Win32_PhysicalMemory_Capacity = ($Win32_PhysicalMemory | ForEach-Object { $_.Capacity } | Measure-Object -Sum).sum
Win32_PhysicalMemory_Capacity_GB = (($Win32_PhysicalMemory | ForEach-Object { $_.Capacity } | Measure-Object -Sum).sum / (1024*1024*1024))
Win32_Processor_Count = [int]$Win32_Processor.Count
Win32_Processor_NumberOfCores = [string]$Win32_Processor[0].NumberOfCores
Win32_Processor_NumberOfLogicalProcessors = [string]$Win32_Processor[0].NumberOfLogicalProcessors
#Win32_Processor_Description = [string]$Win32_Processor[0].Description
Win32_Processor_Manufacturer = [string]$Win32_Processor[0].Manufacturer
Win32_Processor_Name = [string]$Win32_Processor[0].Name
} ## end new-object
$output+=$Computer #combine all the "$computer" to "$output"
Else {
"$ComputerName ping failed."
$output
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Anna
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Trying to pass Oracle array/object type to Java

I have a Java class with two inner classes that are loaded into Oracle:
public class PDFJ
    public static class TextObject
        public String font_name;
        public int font_size;
        public String font_style;
        public String text_string;
    public static class ColumnObject
        public int left_pos;
        public int right_pos;
        public int top_pos;
        public int bottom_pos;
        public int leading;
        public TextObject[] column_texts;
}I have object types in Oracle as such that bind to the Java classes:
CREATE OR REPLACE TYPE "PROGRAMMER"."PDFJ_TEXT" AS OBJECT
EXTERNAL NAME 'PDFJ$TextObject'
LANGUAGE JAVA
USING SQLData(
"FONT_NAME" VARCHAR2(25) EXTERNAL NAME 'font_name',
"FONT_SIZE" NUMBER EXTERNAL NAME 'font_size',
"FONT_STYLE" VARCHAR2(1) EXTERNAL NAME 'font_style',
"TEXT_STRING" VARCHAR2(4000) EXTERNAL NAME 'text_string'
CREATE OR REPLACE TYPE "PROGRAMMER"."PDFJ_TEXT_ARRAY" AS
TABLE OF "PROGRAMMER"."PDFJ_TEXT";
CREATE OR REPLACE TYPE "PROGRAMMER"."PDFJ_COLUMN" AS OBJECT
EXTERNAL NAME 'PDFJ$ColumnObject'
LANGUAGE JAVA
USING SQLData(
"LEFT_POS" NUMBER EXTERNAL NAME 'left_pos',
"RIGHT_POS" NUMBER EXTERNAL NAME 'right_pos',
"TOP_POS" NUMBER EXTERNAL NAME 'top_pos',
"BOTTOM_POS" NUMBER EXTERNAL NAME 'bottom_pos',
"LEADING" NUMBER EXTERNAL NAME 'leading',
"COLUMN_TEXTS" "PROGRAMMER"."PDFJ_TEXT_ARRAY" EXTERNAL NAME 'column_texts'
CREATE OR REPLACE TYPE "PROGRAMMER"."PDFJ_COLUMN_ARRAY" AS
    TABLE OF "PROGRAMMER"."PDFJ_COLUMN";
/I successfully (as far as I know) build a PDFJ_COLUMN_ARRAY object in a PL/SQL procedure. The PDFJ_COLUMN_ARRAY contains PDFJ_COLUMN objects; each of those objects contains a PDFJ_TEXT_ARRAY of PDFJ_TEXT objects (Example: pdf_column_array(i).pdf_text_array(i).text_string := 'something';). In this procedure, I pass this PDFJ_COLUMN_ARRAY as a parameter to a Java function. I assume the Java function parameter is supposed to be a oracle.sql.ARRAY object.
I cannot figure out how to decompose this generic ARRAY object into a ColumnObject[] array. I also tried Googling and searching the forums, but I can't figure out matching search criteria. I was wondering if anyone here knows anything about passing user-defined Oracle type objects to a Java function and retrieving the user-defined Java class equivalents that they are supposedly mapped to--especially a user-defined array type of user-defined object types containing another user-defined array type of user-defined object types.

Ok. I will try asking on the JDBC forum. So, don't
flame me for cross-posting. :PWe won't, if over there you just post basically a
link to this one.
sigh Guess what, he did it the flame-deserving way. It's crossposted at:
http://forum.java.sun.com/thread.jspa?threadID=602805
<flame level="mild">Never ceases to amaze me how people don't think that posting a duplicate rather than a simple link isn't wasteful, as people could end up answering in both of them, not seeing each other's answers</flame>

How to initialize the array of hashmap???

how to initialize the array of hashmap??

What do you mean by "the array of hashmap"?

How to initialize Button Array at "declaration"?

How to initialize Button Array at "declaration"?
Button[] b = new Button[2];
b[0] = "label" ?
b[1] = "label" ?
Again,please at declaration not using setText within main program.

main...
Button[] btts = {new Button(...),new Button(...), ...)
that shold be it

How to ask for an array and how to save the values

I'm supposed to be learning the differences between a linear search and a binary search, and the assignment is to have a user input an array and search through the array for a given number using both searches. My problem is that I know how to ask them how long they want their array to be, but I don't know how to call the getArray() method to actually ask for the contents of the array.
My code is as follows:
import java.util.Scanner;
import java.util.ArrayList;
public class Main
    private static Scanner input = new Scanner(System.in);
    public static void main (String args[])
        //creates ArrayList
        int List[];
        System.out.println("How long would you like the array to be?");
        int arrayLength = input.nextInt();
        //Initializes array list
        List = new int [arrayLength];
        System.out.println("Please enter the first value of the array");
    public static void getArray(int List[], int arrayLength)
        for(int i=0; i < arrayLength; i++) {
             System.out.println("Enter the next value for array");
             List[i] = input.nextInt();
     public static void printArray(int List[])
         for(int i=0; i < List.length; i++)
             System.out.print(List[i] + " ");
public class search
    public static int binarySearch(int anArray[], int first, int last, int value)
        int index;
        if(first > last) {
            index = -1;
        else {
            int mid = (first + last)/2;
            if(value == anArray[mid]) {
                index = mid; //value found at anArray[mid]
            else if(value < anArray[mid]) {
                //point X
                index = binarySearch(anArray, first, mid-1, value);
            else {
                //point Y
                index = binarySearch(anArray, mid+1, last, value);
            } //end if
        } //end if
        return index;
    //Iterative linear search
    public int linearSearch(int a[], int valueToFind)
        //valueToFind is the number that will be found
        //The function returns the position of the value if found
        //The function returns -1 if valueToFind was not found
        for (int i=0; i<a.length; i++) {
            if (valueToFind == a) {
return i;
return -1;

I made the changes. Two more questions.
1.) Just for curiosity, how would I have referenced those methods (called them)?
2.) How do I call the searches?
import java.util.Scanner;
import java.util.ArrayList;
public class Main
    private static Scanner input = new Scanner(System.in);
    public static void main (String args[])
        //creates ArrayList
        int List[];
        System.out.println("How many values would you like the array to have?");
        int arrayLength = input.nextInt();
        //Initializes array list
        List = new int [arrayLength];
        //Collects the array information
        for(int i=0; i < arrayLength; i++) {
             System.out.println("Enter a value for array");
             List[i] = input.nextInt();
        //Prints the array
        System.out.print("Array: ");
        for(int i=0; i < List.length; i++)
             System.out.print(List[i] + " ");
        //Asks for the value to be searched for
        System.out.println("What value would you like to search for?");
        int temp = input.nextInt();
        System.out.println(search.binarySearch()); //not working
}

How do you create an array without using a shell on the FP?

I want to be able to read the status of front panel controls (value, control box selection, etc.) and save it to a file, as a "configuration" file -- then be able to load it and have all the controls set to the same states as were saved in the file. I was thinking an array would be a way to do this, as I have done that in VB. (Saving it as a text file, then reading lines back into the array when the file is read and point the control(s) values/states to the corresponding array element.
So how do I create an array of X dimensions without using a shell on the front panel? Or can someone suggest a better way to accomplish what I am after? (Datalogging doesn't allow for saving the status by a filename, so I
do not want to go that route.)

Thanks so much m3nth! This definitely looks like what I was wanting... just not really knowing how to get there.
I'm not sure I follow all the icons. Is that an array (top left with 0 constant) in the top example? And if so, that gets back to part of my original question of how to create an array without using a shell on the FP. Do I follow your diagram correctly?
If I seem a tad green... well I am.
I hope you understand the LabVIEW environment and icons are still very new to me.
Also, I had a response from an NI app. engineer about this problem. He sent me a couple of VI's that he threw together approaching this by using Keys. (I still think you are pointing to the best solution.) I assume he wouldn't mind m
e posting his reply and the VI's for the sake of a good, thorough, Roundtable discussion. So here are his comments with VI's attached:
"I was implementing this exact functionality this morning for an application I'm working on. I only have five controls I want to save, but they are all of different data types. I simply wrote a key for each control, and read back that key on initialization. I simply passed in property node values to the save VI at the end, and passed the values out to property nodes at
the beginning. I've attached my initialize and save VI's for you to view. If you have so many controls that this would not be feasible, you may want to look into clustering the controls and saving the cluster as a datalog file.
Attachments:
Initialize_Settings.vi ‏55 KB
Save_Settings.vi ‏52 KB

How to output last 4 arrays from a For Loop?

Hi People,
I am almost at the end of my tether. I really hope someone could please help me.
Any input would be welcome. VI attached.
VI explanation:
I initialize an array.
The random number generator simulates my camera input.
Depending on which iteration it is, the data is added into one of four output arrays.
'x-y*floor(x/y)' gives a remainder value of 0, 1, 2 or 3.
'Case Selector' just adds 1 to 'x-y*floor(x/y)' to get case 1, 2, 3 or 4.
Shots 1, 5, 9 etc are added to Array 1 (Case 1).
Shots 2, 6, 10 etc are added to Array 2 (Case 2).
Shots 3, 7, 11 etc are added to Array 3 (Case 3).
Shots 4, 8, 12 etc are added to Array 4 (Case 4).
Averaged Output displays the averaged value i.e. the total value divided by the number of shots saved in that array ('Set (IQ+1)').
My problems are:
1) I would like to output only the last 4 sets of data from the Averaged Output 1, 2, 3 and 4 to 4 different files (i.e. save as .csv what is displayed onscreen in indicators 'Averaged Output 1', 2, 3 and 4 at the end of all iterations.
Where should I place my file save diagram disable so that it does this?
Putting it outside the main For Loop with auto-indexing on gives me one file with all previous data. (This is not feasible as my number of shots should number in the thousands)
Putting it outside the main For Loop with auto-indexing off gives me only the last set of data. (I need the output for 4 Arrays, not just the last run)
Putting it inside the main For Loop (as shown) gives me the same number of files as number of iterations. (Again not feasible due to large number of files that will be generated and slow camera capture)
For the sake of fast camera capture, I would like these 4 files to only output once all the image captures are complete.
2) Would preferably like to name the file once and for the programme to append '(1)', '(2)', '(3)' and '(4)' to filename of the appropriate 'Averaged Output' Arrays but file path controls are another big headache for me.
3) P.s. is initializing one array enough to avoid using Memory Manager? Or should I initialize 4 arrays?
I am using Labview 2010.
Thanks so much,
Jaslyn
Solved!
Go to Solution.
Attachments:
Help Understanding Arrays and file paths (10).vi ‏26 KB

Thanks so much Lennard!!
Hi JKSH,
I've been busy trying to complete the dang code, but for completeness so that other users can learn too, I shall answer your queries. Thanks for looking in.
First, what do you mean by "add"? Your code in your case strcuture sums your input values, so your array size doesn't change. However, you also said "Putting it outside the main For Loop with auto-indexing on gives me one file with all previous data. (This is not feasible as my number of shots should number in the thousands)" -- it sounds like you are expecting an array with thousands of elements. So, what should "Output Array N" look like?
Ans: Output Array N should be a 4x4 array of the summation of all the numbers generated during every 4th iteration.
i.e. if random number 1=1, random number 2=2, etc, And 'No of iterations' is 12,
Output Array 1 should be 1+5+9:
15 15 15 15
15 15 15 15
15 15 15 15
15 15 15 15
(Note: Most of your arrays are 4x4, but in Case #2 you created 128x128. I prersume this is a typo?)
Ans: Kind of, I'm using a 4x4 array of randomly generated numbers as an example but my actual data will be the 128x128 pixel output of a camera. And during actual experimentation, 'No of Iterations' will number in the thousands.
Second, why do you add your "simulated camera input" to the "Initialized Array"? You can add it direcly to the previous output inside your case structure.
Ans: See answer to question 3
Third, have a look at shift registers: http://www.ni.com/gettingstarted/labviewbasics/shiftregisters.htm. Use them instead of Feedback Nodes to make your code tidier.
Ans: I did try.. But I can't seem to add shift registers to the case structure, only the for loops outside. Are you sure it can be done..?
jaslyn wrote:
1) I would like to output only the last 4 sets of data from the Averaged Output 1, 2, 3 and 4 to 4 different files (i.e. save as .csv what is displayed onscreen in indicators 'Averaged Output 1', 2, 3 and 4 at the end of all iterations.
Where should I place my file save diagram disable so that it does this?
For the sake of fast camera capture, I would like these 4 files to only output once all the image captures are complete.
You will need to call "Write to Text File.vi" 4 times to write 4 files. So, you should finish your loop, then call this VI 4 times.
Ans: How do I get it to extract the data from each of the 4 cases in my case structure?
jaslyn wrote:
2) Would preferably like to name the file once and for the programme to append '(1)', '(2)', '(3)' and '(4)' to filename of the appropriate 'Averaged Output' Arrays but file path controls are another big headache for me.
You can create strings first, then convert them into paths: http://zone.ni.com/reference/en-XX/help/371361G-01/glang/string_to_path/
Thanks
jaslyn wrote:
3) P.s. is initializing one array enough to avoid using Memory Manager? Or should I initialize 4 arrays?
I'm not sure what you're asking; can you please clarify what you mean by "avoid using Memory Manager"? But anyway, you've actually initialized FIVE arrays: 1 outside the loop, and 1 inside each case.
I've read that to avoid fluctuations in memory usage, it is a good idea to initialize arrays to their expected size before the start of data collection. That was just what I was trying to do.

Initializing arrays

Hello!
I'm doing a program which works with arrays. I use initialize block arrays to create them. But it depends on other variables the dimension of these arrays. If I want to change the length of a dimension I wire a variable to the block, but I have no idea what can I wire to the block to modify the number of dimensions....it cannot be modify when the program is running?? How I have to do modify the number of dimensions depends on a variable?
Thank you in advance!
Larson

The initialize array function is a growable function, that is it changes the function inputs by dragging the dimensions not programatically. There is a work around, you can use a case structure to call different versions of the function. This will work but will only for a finite number of cases. The other way is to initialize a multidimensional array as a single dimension and then pass it to the resize array function, i.e initialize ARRAY[i*j*k] and resize to ARRAY[i][j][k]. This is a little unusual to deal with arrays which change at runtime. The final approach it to write polymorphic functions to handle the different cases, again you will not have full dynamic run-time handling of all possible cases but can handle a few cases easily.
Paul
Paul Falkenstein
Coleman Technologies Inc.
CLA, CPI, AIA-Vision
Labview 4.0- 2013, RT, Vision, FPGA

How can i get a array from a JSP ?

Hi all,
i have a STORED PROCEDURE like this:
static public void getMyArray(double [] xx) {
for (int i=0; i<myarr.length;i++){
myarr=3.145*i;
xx=myarr;
return ;
how can i get the array with XSQL and transform with a XSL ?
Is this at all possible?
Thanks for any help.
Achim

u r asking how ca u get array from jsp?
and u r asking xsql ...some stuff i couldnot understand .can u repeat the question properly?
null

How can I convert an array off byte into an Object ?

Hi folks...
I�m developing an application that comunicates a PDA and a computer via Wi-Fi. I�m using a DataStream ( Input and Output ) to receive / send information from / to the computer. Most off the data received from him is in the byte[] type...
How can I convert an array off byte ( byte[] ) into an Object using MIDP 2.0 / CLDC 1.1 ?
I found on the web 2 functions that made this... but it uses a ObjectOutputStream and ObjectInputStream classes that is not provided by the J2ME plataform...
How can I do this ?
Waiting answers
Rodrigo Kerkhoff

There are no ObjectOutputStream and ObjectInputStream classes in CLDC. You must know what you are writing to and reading from the DataStream. You should write the primitives like int, String to the DataOutputstream at one end and read those in exactly the same sequence at the outher end using readInt(), readUTF() methods.

How do I convert an array of BYTES (where each BYTE represents a bit) into a single Hex number?

I am reading a signal from a USB-8451. This signal is stored as an array where each element represents a bit in the signal, but is stored in the array as a byte. How do I convert this array into a single Hex number. I attatched what I have so far, there are a few extra things to help me see what ia going on. One code uses Queue and the other uses arrays, let me know if you can help.
Attachments:
845x_EEPROMarrays.vi ‏27 KB
845x_EEPROM.vi ‏26 KB

mkssnwbrd wrote:
... so we can't introduce any other forms of signals or power into the circuit other than what the circuit already has. Trithfully I don't really know how I2C devices work, but my mentor here says that we can't use an I2C method becuase it will introduce voltage into the circuit and may damage out TCON chip.
That makes absolutely no sense. What do you think is happening when you write the digital lines? You're setting a pin high. That voltage is being generated by the 8451x. I think you're not understanding what your mentor is saying. If it's an I2C device then you should be able to use the I2C function to simply talk to it. You still have not indicated what the device is, so there's little more I can say about that aspect of it.
As far as the conversion is concerned, you basically need loop through your array of "bits", taking 16 at time since you said you have 16-bit values. It's not clear from your code whether your eventual goal is to get a numeric value or a string. This does not appear to be a subVI, so a simply numeric indicator formatted to display in hex format should be quite adequate. The array you are generating is an array of rings, whose datatype is I32, but they will have values of 0 or 1. You can use the example just posted, or you can use the attached variation.
Attachments:
Bits to Hex 2.vi ‏17 KB

How can I use my array in another method.... Or better yet, what's wrong?

I guess I'll show you what I am trying to do rather and then explain it
public class arraycalc
int[] dog;
public void arraycalc()
dog = new int[2];
public void setSize(int size)
dog[1] = size;
public int getSize()
return dog[1];
This gives me a null pointer exception...
How can I use my array from other methods?

You have to make the array static. :)
Although I must admit, this is rather bad usage. What you want to do is use an object constructor to make this class an object type, and then create the array in your main class using this type, and then call the methods from this class to modify your array. Creating the array inside the other method leads to a whole bunch of other stuff that's ... well, bad. :)
Another thing: Because you're creating your array inside this class and you want to call your array from another class, you need to make the array static; to make it static, you must make your methods static. And according to my most ingenious computer science teacher, STATIC METHODS SUCK. :D
So, if you want to stick with your layout, it would look like:
public class arraycalc
     static int[] dog;
     public static void arraycalc()
          dog = new int[2];
     public static void setSize(int size)
          dog[1] = size;
     public static int getSize()
          return dog[1];
}But I must warn you, that is absolutely horrible code, and you shouldn't use it. In fact, I don't even know why I posted it.
You should definitely read up on OOP, as this problem would be better solved by creating a new object type.

How do I fix my PDF so I don't get the error message: "expected an array object"?

When I try to delete certain pages from my PDF file (which is larger than 3,000 pages), I get an error message that states "expected an array object." I am unable to delete these pages. How can I fix this problem?

It looks like the original PDF file is damaged in some ways. Have you tried creating a new file from the existing file to see if it works? The quickest way to create a new file is to print the existing file to a PDF file. OK you lose some quality but this is just a test to see if there is anything else wrong with the Acrobat setup or with the document itself.

How Do I Initialize an Array of Array Objects?

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