Output array elements to a .dat file

I've written a program that creates two arrays, each containing 999 pseudorandom numbers. Now, I need to output these numbers to a .dat file containing two columns of data (one column for each array). How do I do this?

Never mind, I figured it out on my own!

Similar Messages

Connect an 1-D array of cluster of 3 elements with dynamic data

hi everybody.
I am trying to wire an 1-D array which consists of a cluster of 3 elements with dynamic data. The error that appears says that I'm trying to "connect two terminals of different types". Actually, what I want to do is write to a file the FFT data produced by the Spectral Measurements vi. In order to write to a file, I am using the Write to Measurement File vi, but I don't know if this is the right way to do this. Has anyone any idea about this problem, because I'm out of ideas....
Thanks a lot!!

ok! This works really good! thanks a lot! now i'm facing an other problem...The output file does not contain the right data. I want to collect the FFT (frequency vs. amplitude) of a time signal and it gives me the record length and the sampling rate instead.
For example, if I use a sampling rate of 300 ksamples/sec and a record length of 1000 sampling points, the file to be created has one column containing the record length e.g.
0
1
2
3
498
499
and on more column containing almost zero values and the value of the sample rate. Do you have any idea why this is happening?
Thank you!!

I have a VI and an attched .txt data file. Now I want to read the data from the .txt file and display it as an array in the front panel. But the result is not right. Any help?

I have a VI and an attched .txt data file. Now I want to read the data from the .txt file and display it as an array in the front panel. But the result is not right. Any help?
Attachments:
try2.txt ‏2 KB
read_array.vi ‏21 KB

The problem is in the delimiters in your text file. By default, Read From Spreadsheet File.vi expects a tab delimited file. You can specify a delimiter (like a space), but Read From Spreadsheet File.vi has a problem with repeated delimiters: if you specify a single space as a delimiter and Read From Spreadsheet File.vi finds two spaces back-to-back, it stops reading that line. Your file (as I got it from your earlier post) is delimited by 4 spaces.
Here are some of your choices to fix your problem.
1. Change the source file to a tab delimited file. Your VI will then run as is.
2. Change the source file to be delimited by a single space (rather than 4), then wire a string constant containing one space to the delimiter input of Read From Spreadsheet File.vi.
3. Wire a string constant containing 4 spaces to the delimiter input of Read From Spreadsheet File.vi. Then your text file will run as is.
Depending on where your text file comes from (see more comments below), I'd vote for choice 1: a tab delimited text file. It's the most common text output of spreadsheet programs.
Comments for choices 1 and 2: Where does the text file come from? Is it automatically generated or manually generated? Will it be generated multiple times or just once? If it's manually generated or generated just once, you can use any text editor to change 4 spaces to a tab or to a single space. Note: if you want to change it to a tab delimited file, you can't enter a tab directly into a box in the search & replace dialog of many programs like notepad, but you can do a cut and paste. Before you start your search and replace (just in the text window of the editor), press tab. A tab character will be entered. Press Shift-LeftArrow (not Backspace) to highlight the tab character. Press Ctrl-X to cut the tab character. Start your search and replace (Ctrl-H in notepad in Windows 2000). Click into the Find What box. Enter four spaces. Click into the Replace With box. Press Ctrl-V to paste the tab character. And another thing: older versions of notepad don't have search and replace. Use any editor or word processor that does.

Build Array and Output Values to Text or Excel File

I know this is a simple question but I need some help. I'm reading a DC voltage in LabVIEW a while loop. I want to store all the read values into an array and export that array as an text or Excel file. I had a VI that I build before for this but I cannot seem to find it and I can't remember how I did it before. Any help is appreciated. I think I can do the exporting part but I do help with building the array (storing all the data values).

I run into a problem while using the "Write to Text File Function". Initially I took about 60 measurements and wrote to a text file. That works but I increased the amount of measurements to be taken to 600 and when I did that the output in the text file are all Chinese letters (or that's what it seems like). Is this because I'm writing too much data?
When I use the "Write To Spreadsheet File VI" to write the measurments it works fine for the 600 measurements. The problem with this is I cannot insert any text. Using the "Write to Text File Function" I inserted some text before the measurements and "end of lines", to format the data. Attached is a screenshot of my VI.
Attachments:
measurements.PNG ‏45 KB

Type defined array of clusters for holding configuration data - setting default values for each array element

Hi,
I was wondering if I could get some information and opinions about using a type defined array of clusters to hold configuration data. I am creating a program to test multiple DUTs and wanted to have a type defined control for each DUT containing the information needed to create the DAQmx tasks for all of the signals for that DUT. I am wanting to do this so that the data is hard-coded and not in a file that the user could mess up.
The type def controls are then put in a subVI that chooses the appropriate one based on the DUT Type enumeration wired to a case structure.
I am having problems with the type defined control. I am seeing issues when attempting to save a unique configuration to each array element in the array of clusters. Somehow it worked to begin with, but now clicking "Data Operations --> Make Current value default" on individual elements of the cluster or the entire cluster (array element) is not saving the data when I re-open the type def control. What am I doing wrong? Am I trying to do something with arrays of clusters that I should not be doing?
I have attached one of the type defined controls for reference. I tried changing it to Strict to see if that helped, but no luck.
To reproduce, change the resource string for array element 0 and make the new value the default value. Then close the type def, and re-open it. The old value is still present in that element. The VI is saved in LabVIEW 2012.
Solved!
Go to Solution.
Attachments:
CM_AnalogInputs.ctl ‏11 KB

Values of a typedef are not proprigated to instances of the control. THey will pick it up if created AFTER the data values have been changed. THey will not get updated with future changes. You should either create a VI specifically for hardcoding your values or implement a file based initialization. The file based would be much better and more flexible. If you don't want users to modify the data simply encrypt it. There is a noce blowfish library you can download.
Mark Yedinak
"Does anyone know where the love of God goes when the waves turn the minutes to hours?"
Wreck of the Edmund Fitzgerald - Gordon Lightfoot

Fixed format data file output

Does anyone know how to generate fixed format text file? I have few fields in the select which are null and hence messes up the file format, as space does not take up same amount of character width than any alphabets.
Basically I want to generate fixed length data file which is scheduled through DBMS_JOBS. I am using UTL_FILE utility.
Every suggestion are welcome
Thanks in advance for help :)
email your response at [email protected]

hello,
using spaces as filler is sufficient. a space takes up the same room (one character) as any other letter in the alphabet.
if you look at the output in any word-processing tool or editor, that uses fonts like times, helvetica, arial, etc. those fonts are rendering the space-character smaller. in fact they are rendering each letter different. if you want to see what your output looks like, choose a font like courier.
if you just generate the file and then process it further, you should be OK. don't let you be fooled by what you see in your editor.
regards,
philipp

Variable not being included in XML data file output

This seems like it should be obvious, but I've struggled with this for a couple of days.
As a programming principle, I like to make the form as "smart" as possible and the resulting Word templates, or XML documents as simple as possible. I need to be able to set a "flag" that would be in the XML data file if certain conditions are met, e.g.,
if (field1.rawValue == "0"){variable1 == "1"};
if (field2.rawValue == "0") {variable1 == "1"}; etc.
The problem that I'm having is that I can't seem to get variable1 to be included in the XML data file that the form creates.
Help! This seems like it should be so simple but I'm baffled.
Bill

The variable you're setting does not fall within the scope of the xml output (it's scope is only within the execution of the form).
Try creating a variable (Using File > Form Properties >Variable) and assigning your value to it (variableName.value = 1).
One note of warning, you'll want to trigger the validation event every time the form is opened or your value will return to the default value when users re-open the form.

Synchronous processing of dat file using Adobe Output Server

Hello everyone
I have a doubt regarding Adobe Output Server. Currently my output server is running as a window service named "Adobe Central Output Server" in my machine referring to executable path E:\Jetform\Central\Control\jfservic.exe. It keeps on running irrespective of whether .dat file is present for further processing or not. In case .dat is there in data folder[location where my code writes into .dat file] it picks it up and does all the processing to give the result in form of Print/Fax. But when there is no .dat file present , still the service keeps on running consuming memory & cpu resource.
Curently my code drops a .dat file in data folder and dont bother about what happens to that .dat file afterwards. Its Adobe Output Server service that is running that keeps on monitoring data folder for any new dat file to process them further.
I want to stop that window service permanently and i wish to change some logic in my code so that as and when my program drops a .dat file in Data folder then i invoke Adobe Output Server or some of its component so that it picks up that dat file and does all the processing to generate Print/Fax and once its done with processing , the execution of Adobe central server ends. And it remains dead till its invoked by the program to process a new dat file.
So basically i was wondering whether there is possibiliy of invocation of Adobe Output Server is available or not for synchronous processing of dat file from the code.
Any suggestions , any ideas , any doubts on it are most welcome.
jaY

i faced the same thing
1- you have to do something in SAP ( i am looking for someone to tell me what )
2- create a job & name it by (ANYNAME_EMAIL)
3- Inside the Job create the following Tasks
a- SAPMERGER A
b- SAPMERGER
c- SAPEMSEND
that's it / AS Simple AS That
Please tell me if you still facing the same problem

Found character data inside an array element while deserializing

Hi Experts,
When I am trying to execute the webservice I am getting the following error
Found character data inside an array element while deserializing
Actual structure is as follows
<?xml version="1.0" encoding="ISO-8859-1"?>
<xsd:schema xmlns:xsd="http://www.w3.org/2001/XMLSchema" xmlns="http://10.1.2.21:8090/axis/services/InventoryManager" targetNamespace="http://10.1.2.21:8090/axis/services/InventoryManager">
<xsd:import namespace="http://schemas.xmlsoap.org/soap/encoding/" />
<xsd:element xmlns:wsdl="http://schemas.xmlsoap.org/wsdl/" xmlns:soapenc="http://schemas.xmlsoap.org/soap/encoding/" xmlns="" name="retrieveInventoryRequest" type="retrieveInventoryRequest" />
<xsd:complexType xmlns:wsdl="http://schemas.xmlsoap.org/wsdl/" xmlns:soapenc="http://schemas.xmlsoap.org/soap/encoding/" name="ArrayOf_xsd_string">
<xsd:complexContent>
<xsd:restriction base="soapenc:Array">
<xsd:attribute ref="soapenc:arrayType" wsdl:arrayType="xsd:string[]" />
</xsd:restriction>
</xsd:complexContent>
</xsd:complexType>
<xsd:complexType xmlns:wsdl="http://schemas.xmlsoap.org/wsdl/" xmlns:soapenc="http://schemas.xmlsoap.org/soap/encoding/" name="ArrayOf_tns1_SkuQuantity">
<xsd:complexContent>
<xsd:restriction base="soapenc:Array">
<xsd:attribute ref="soapenc:arrayType" wsdl:arrayType="tns1:SkuQuantity[]" />
</xsd:restriction>
</xsd:complexContent>
</xsd:complexType>
</xsd:schema>
I know XI doesnt support array types thats why I have created my own structure as follows
<?xml version="1.0" encoding="ISO-8859-1"?>
<xsd:schema xmlns:xsd="http://www.w3.org/2001/XMLSchema">
<xsd:element name="retrieveInventory" type="InvArray" />
<xsd:complexType name="InvArray">
<xsd:sequence>
<xsd:element name="pOutletList" type="xsd:string" maxOccurs="unbounded" form="qualified" />
<xsd:element name="pSkuQuantityList" type="xsd:string" maxOccurs="unbounded" form="qualified" />
</xsd:sequence>
</xsd:complexType>
</xsd:schema>
This webservice takes input like
storenumber1;storenumner2....
item1,qty;item2,qty.
I am passing values like this to my webservice. But still I am getting the same probl

The problem doesn't seem to be related to the XI system. Have you done any configuration at receiver Webservice to convert the string data passed through XI into string array data? I think there is a mismatch in what XI sends and receiver expects.
Regards,
Prateek

How to get a data element's value from the data file while bursting

For faxing bursted data into rightafx, I need to first burst my invoice data file into numerous pdf files in the filesystem, and then use the rightfax function of the delivery manager to send those files to different faxes. Integration with rightfax is not available in the bursting engine.
While bursting the xml data file based on invoice number, I need to get the fax number that is different for each invoice in a java variable so that I can use it to pass fax number information to rightfax. Is it possible?
Thanks.

Can any one help?
Edited by: MTW on Apr 16, 2010 6:58 AM

Running 5 commands using array elements and waiting between?

Hi All,
Trying to learn PS so please be patient with me ;)
System: PSv3 on Win2012 server running WSUS role
I am wanting to execute 5 commands using a 'foreach' loop but wait until one finishes before moving onto the next. Can you please check out what I have and provide some suggestions of improvement? or scrap it completely if it's rubbish :(
Current code:
#### SCRIPT START ####
#Create and define array and elements
$Array1 = @(" -CleanupObsoleteComputers"," -DeclineSupersededUpdates -DeclineExpiredUpdates"," -CleanupObsoleteUpdates"," -CleanupUnneededContentFiles"," -CompressUpdates")
#Run the cleanup command against each element
foreach ($element in $Array1) {
Get-WsusServer | Invoke-WsusServerCleanup $element -Whatif
#### SCRIPT END ####
I am assuming that I need to use @ to explicitly define elements since my second element contains two commands with a space between?
The cleanup command doesn't accept '-Wait' so I'm not sure how to implement a pause without just telling it to pause for x time; not really a viable solution for this as the command can sometime take quite a while. They are pretty quick now that I do
this all the time but just want it to be future proof and fool proof so it doesn't get timeouts as reported by others.
I have found lots of code on the net for doing this remotely and calling the .NET assemblies which is much more convoluted. I however want to run this on the server directly as a scheduled task and I want each statement to run successively so it
doesn't max out CPU and memory, as can be the case when a single string running all of the cleanup options is passed.
Cheers.

Thank you all for your very helpful suggestions, I have now developed two ways of doing this. My original updated (thanks for pointing me in the right direction Fred) and Boe's tweaked for my application (blew my mind when I first read that API code
Boe). I like the smaller log file mine creates which doesn't really matter because I am only keeping the last run data before trashing it anyway. I have also removed the verbose as I will be running it on a schedule when nobody will be accessing it anyway,
but handy to know the verbose commands ;)
Next question: How do I time these to see which way is more efficient?
My Code:
$Array1 = @("-CleanupObsoleteComputers","-DeclineSupersededUpdates","-DeclineExpiredUpdates","-CleanupObsoleteUpdates","-CleanupUnneededContentFiles","-CompressUpdates")
$Wsus = Get-WsusServer
[String]$Logfile = 'C:\Program Files\Update Services\LogFiles\ArrayWSUSCleanup.log'
[String]$Logfileold = 'C:\Program Files\Update Services\LogFiles\ArrayWSUSCleanup.old'
If (Test-Path $Logfileold){
Remove-Item $Logfileold
If (Test-Path $Logfile){
Rename-Item $Logfile $Logfileold
foreach ($Element in $Array1)
Get-Date | Out-File -FilePath $LogFile -Append -width 50
Write-Output "Performing: $($Element)" | Out-File -FilePath $LogFile -Append -width 100
. Invoke-Expression "`$Wsus | Invoke-WsusServerCleanup $element" | Out-File -FilePath $LogFile -Append -width 100
Logfile Output {added 1 to show what it looks like when items are actions}:
Wednesday, 27 August 2014 2:14:01 PM
Obsolete Computers Deleted:1
Wednesday, 27 August 2014 2:14:03 PM
Obsolete Updates Deleted:1
Wednesday, 27 August 2014 2:14:05 PM
Expired Updates Declined:1
Wednesday, 27 August 2014 2:14:07 PM
Obsolete Updates Deleted:1
Wednesday, 27 August 2014 2:14:09 PM
Diskspace Freed:1
Wednesday, 27 August 2014 2:14:13 PM
Updates Compressed:1
Boe's Updated Code:
[String]$WSUSServer = 'PutWSUSServerNameHere'
[Int32]$Port = 8530 #Modify to the port your WSUS connects on
[String]$Logfile = 'C:\Program Files\Update Services\LogFiles\APIWSUSCleanup.log'
[String]$Logfileold = 'C:\Program Files\Update Services\LogFiles\APIWSUSCleanup.old'
If (Test-Path $Logfileold){
Remove-Item $Logfileold
If (Test-Path $Logfile){
Rename-Item $Logfile $Logfileold
[Void][reflection.assembly]::LoadWithPartialName("Microsoft.UpdateServices.Administration")
$Wsus = [Microsoft.UpdateServices.Administration.AdminProxy]::getUpdateServer($WSUSServer,$False,$Port)
$CleanupMgr = $Wsus.GetCleanupManager()
$CleanupScope = New-Object Microsoft.UpdateServices.Administration.CleanupScope
$Properties = ("CleanupObsoleteComputers","DeclineSupersededUpdates","DeclineExpiredUpdates","CleanupObsoleteUpdates","CleanupUnneededContentFiles","CompressUpdates")
For ($i=0;$i -lt $Properties.Count;$i++) {
$CleanupScope.($Properties[$i])=$True
0..($Properties.Count-1) | Where {
$_ -ne $i
} | ForEach {
$CleanupScope.($Properties[$_]) = $False
Get-Date | Out-File -FilePath $LogFile -Append -width 50
Write-Output "Performing: $($Properties[$i])" | Out-File -FilePath $LogFile -Append -width 100
$CleanupMgr.PerformCleanup($CleanupScope) | Out-File -FilePath $LogFile -Append -width 200
Logfile Output {added 1 to show what it looks like when items are actions}:
Wednesday, 27 August 2014 2:32:30 PM
Performing: CleanupObsoleteComputers
SupersededUpdatesDeclined : 0
ExpiredUpdatesDeclined    : 0
ObsoleteUpdatesDeleted    : 0
UpdatesCompressed         : 0
ObsoleteComputersDeleted : 1
DiskSpaceFreed            : 0
Wednesday, 27 August 2014 2:32:32 PM
Performing: DeclineSupersededUpdates
SupersededUpdatesDeclined : 1
ExpiredUpdatesDeclined    : 0
ObsoleteUpdatesDeleted    : 0
UpdatesCompressed         : 0
ObsoleteComputersDeleted : 0
DiskSpaceFreed            : 0
Wednesday, 27 August 2014 2:32:34 PM
Performing: DeclineExpiredUpdates
SupersededUpdatesDeclined : 0
ExpiredUpdatesDeclined    : 1
ObsoleteUpdatesDeleted    : 0
UpdatesCompressed         : 0
ObsoleteComputersDeleted : 0
DiskSpaceFreed            : 0
Wednesday, 27 August 2014 2:32:36 PM
Performing: CleanupObsoleteUpdates
SupersededUpdatesDeclined : 0
ExpiredUpdatesDeclined    : 0
ObsoleteUpdatesDeleted    : 1
UpdatesCompressed         : 0
ObsoleteComputersDeleted : 0
DiskSpaceFreed            : 0
Wednesday, 27 August 2014 2:32:38 PM
Performing: CleanupUnneededContentFiles
SupersededUpdatesDeclined : 0
ExpiredUpdatesDeclined    : 0
ObsoleteUpdatesDeleted    : 0
UpdatesCompressed         : 0
ObsoleteComputersDeleted : 0
DiskSpaceFreed            : 1
Wednesday, 27 August 2014 2:32:43 PM
Performing: CompressUpdates
SupersededUpdatesDeclined : 0
ExpiredUpdatesDeclined    : 0
ObsoleteUpdatesDeleted    : 0
UpdatesCompressed         : 1
ObsoleteComputersDeleted : 0
DiskSpaceFreed            : 0

Sum array elements not working

I am trying to output the average % standard deviation per point for a series of data sets. To do this I want to use the sum array elements function. The program I have written should work I am pretty sure, but when I watch data flow through it, 1000 points get input into the sum function and NaN comes out. What could cause an error like this? I have tried inverting my array, etc. Is there a limit to the number of points the function can take? Or to the precision of the points being input? Thanks, this is driving me crazy!
[I renamed the file and attached it again so you can open it - Molly K]
Message Edited by Support on 07-06-2005 08:23 AM
Attachments:
Average % Std Dev.vi ‏23 KB
Average.vi ‏23 KB

Any arithmetic operation on a NaN value is invalid and must result in NaN as
well. You probably need to make sure first that your array doesn't
contain NaN, Inf, and -Inf.
Rolf Kalbermatter
Message Edited by rolfk on 07-05-2005 11:37 AM
Rolf Kalbermatter
CIT Engineering Netherlands
a division of Test & Measurement Solutions

Using a For Loop Index for Array Element Number?

Hi. Thanks in advance for the help. I can't seem to find what I want to do here using the search function... probably because I don't know how to frame the question appropriately. Ignore the title to this post cause it's probably wrong vocabulary for what I want to do.
Here's the situation:
I have a 2D array where the first column is the X data and each subsequent column is Y data (call it Y1...Yn). The n-value varies from run to run (some runs have 4 columns of data, some have 20), but that is easily gathered when reading the data file. I need to perform a number of operations on each set of data, the least of which is smoothing the data and graphing it, so I'm limiting my discussion to these 2 operations.
What I want is a for loop structure where the indexing of the loop tracks the Y1...Yn columns, grabs each column for the iteration, performs the relevant analysis, and spits out the result, but in a stackable manner. Thus the title; I want to use the for loop's index to mark the array element for building a new array.
See the image attached. A 2D array of 9 columns (X, Y1...Y8) is analyzed such that each data set, (X, Y1), (X, Y2)...(X, Y8) is bundled, graphed, run through a B-spline Fit, of which is also graphed. I need to replace this with something that looks like the for loop structure shown.
I just don't know how to get those two data bundles [(X, Yi) and it's smoothed pair] out of the for loop in a stacked set from every iteration of the for loop.
Again the title, I think I want to build a new array where i use the index of the for loop to control the entries of the new array. But I can't see how to do that.
Any help would be appreciated.
Attachments:
NeedForLoopForThis.PNG ‏30 KB

Hello H.R. Dunham, and welcome to the forum!
It seems that you may be looking for Auto-Indexing, a basic feature of loops in LabVIEW. You'll need to transpose your array before wiring it into the for loop, as elements are auto-indexed by row before column, but at that point you should be able to operate on each column and output an array of n cluster elements corresponding to your input columns. Auto-indexing tunnels look like brackets to indicate each element will be indexed automatically- this should be the default when wiring an array into a for loop or when wiring anything out of a for loop.
As for how to build your pairs, I suggest removing the X column and creating a "starter" cluster containing your X data and placeholder Y data before entering your "Y" processing loop. Use the bundle by name function in the for loop to insert your processed column data into the cluster and auto-index the cluster output. Flow would be something like this:
1) Gather data
2) Split X and Y using standard array operations
3) Create "template" cluster with shared X data
4) Pass template cluster and Y-column array into an auto-indexed for loop.
5) Insert processed Y data into cluster inside loop.
6) Auto-index cluster data out of loop.
This tutorial is probably also a good place to get started:
Getting Started with NI LabVIEW Module 3: Loops
http://www.ni.com/white-paper/7528/en/
Hope that helps!
Regards,
Tom L.

Use of PL/SQL to populate table columns from XML data file

I'm trying to find the easiest way to transfer data from a flat file that is in XML format into a traditional Oracle table. Not retaining the XML but actually map an XML element to a column so standard SQL, Forms, Reports, etc can access like it was created using a Form.
Example: Table A has column names Tom, Dick and Harry and the XML file has elements Tom, Dick and Harry and I just want a function that maps and inserts/loads the data into Table As individual columns.
The process needs to be easily initiated by an end user. The user gets the XML data file via an email attachment and needs to do something like a Concurrent Request to pull in the file and load it. Using PL/SQL would be great.
I appreciate any help that can be provided.

Hi,
HELP!!!!!
We are having the same problem and we are using oracle 10ir2.
We create an object type (sql type globally not in a package):
CREATE OR REPLACE TYPE G_EX AS OBJECT
( EX_ID NUMBER ,
EX_CON VARCHAR2 ( 100 ) ,
EX_L VARCHAR2 ( 30 ) ,
EX_T VARCHAR2 ( 4000 ) );
CREATE OR REPLACE TYPE G_EX LIST AS TABLE OF GEX AS ;
then we insert data through a bulk collect within the package with the table declared of this array of object types:
v_table G_EX _LIST:= NULL;
SELECT G_EX (ex_id
,ex_con
,ex_l
,ex_t )
BULK COLLECT INTO v_table
FROM exs_lookup;
I am using the syntax (below) but it gives PL/SQL: ORA-00902: invalid datatype
sometimes not always:
SELECT G_EX ( ex_id
,ex_con
,ex_l
,ex_t )
BULK INTO v_data_record
FROM TABLE (v_table)
WHERE ex_id = p_key;
where p_key - is a number type
and v_data_record is a G_EX object type.
I was wondering if anyone else encountered a similar problem, and knows what we may have done wrong. Since we dont understand why this piece of code is throwing this ora-00902 errors occasionally not always.
Also, if we restart the database up once this errors occurs it appears to stop throwing this ora_00902 error for a lenght of time. Then it comes up with the ora-00902 error again (why?)
thanks

Need to read data files originally created in LabVIEW in C++

I have originally created binary files in LabVIEW. These files are made by flattening labview data to a string, then converting the string to a U8 byte array which is then saved to a binary data file. A separate file is used to keep track of the variables written to the data file. (FAT) a 2D-String array (first element = variable name, 2nd element = staring byte location in .dat file, 3rd element = byte length of variable) is flattened to U32 and then written to a binary file.
Opening the files in LabVIEW follows the inverse proceedure. The FAT file is read as a U32 binary data, converted to a byte array, converted to a string, and then unflattened from the string into a LabVIEW 2D-string data type. From this the starting location and length of the variable is extracted. These are used to read the data file, in U8, which is then converted bu a string and then unflattened to LabVIEW data according to the LabVIEW data type.
I now need to now open these files in a Linux environment using C++. I am at a loss at how to emulate all of this data-type conversion, flattening, and unflattening in C++. Does anyone have any ideas?

Faraclas wrote:
> Thanks rolfk, I will do the reading. But just to make sure you don't misunderstand
> me, everything works beautifully in LabVIEW.
I gathered that. But reading through the description gave me the
impression that a few conversions/typecasts may actually be superfluous
without any change to the actual data.
> The problem I am having is trying to open up these files in C++. This system has
> been around for a couple of years now, so I cannot change the data structure in
> the LabVIEW programs (well I could but I don't want to because it is really a very
> flexible system that works well).
Well, it really isn't that difficult, it just won't be a one hour job
for sure. A few guidelines:
1) LabVIEW flattened data contains the actual data as is for all fixed
size elements (scalars and clusters of scalars). Any variable sized data
(strings, arrays) is prepended with an int32 for each dimension
containing the number of elements for that dimension.
2) LabVIEW flattened data is always in Big Endian (Most significant Byte
first) format. This means for normal C(++) programs developed on an x86
system you will have to byteswap every single 16 bit and 32 bit integer.
3) LabVIEW Typecast really is similar to Flattened data but no
prepending of the number of elements is done for variable sized data.
And Typecast can't convert any type containing variable sized data, but
any arbitrary complex datatype only containing fixed size data, or a
simple array or string can be typecasted.
Rolf Kalbermatter
Rolf Kalbermatter
CIT Engineering Netherlands
a division of Test & Measurement Solutions

Output array elements to a .dat file

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