C/C++ routines to convert tdm/tdx files to text

I need to write a C/C++ program to convert TDM & TDX file data into text files. Does NI or anyone
offer any example C or C++ source code to do this? I have some large data sets (> 500 Mbytes)
that I would like to break up to be analyzed using MATLAB or C/C++ routines.

Hi,
Please contact National Instruments support for further assistance with this issue or send email to [email protected]
Thanks.
Tunde A.

Similar Messages

Gezippte TDM/TDX FIles über Anwenderbefehl laden

Hallo,
ich habe aus Platzgründen meine TDM/TDX Files gezippt.
Ich möchte aber nicht vor jedem Analysieren der Messwerte die Dateien erst von Hand entpacken und dann in DIAdem öffnen. Daher habe ich mir einen Anwenderbefehl geschrieben. Diese soll über Navigator.Events.OnFileLoading das Laden einer Datei abfangen. Daraufhin wird die Dateierweiterung der Datei geprüft. Entspricht sie der von mir vorgegebenen Form TDZ, so werden zuerst die gepackten TDM/TDX Dateien aus der TDZ in ein tempoeräres Verzeichnis entpackt und von dort aus geladen.
Der Anwenderbefehl wurde Einstellungen->Optionen->Erweiterungen->Anwenderbefehle aktiviert.
Damit ich die TDZ Datei auch im DataFinder sehe, habe ich ein DataPlugin für 'TDM Zip' erstellt. Die Prozedur ReadStore ist jedoch leer.
Beim ersten 'Laden' einer TDZ bzw. der dort gepackten TDM/TDX Dateien klappt auch alles einwandfrei. Der Anwenderbefehl wird ausgeführt.
Möchte ich jedoch eine weitere TDZ Datei laden, so erhalte ich den Fehler, dass das Laden der Datei xyz.tdz mit dem Ladeverfahren 'TDM Zip' fehlgeschlagen ist. Beim Datenimport ist das Kopieren der Massendaten aus der Datei xyz.tdz in die internen Daten fehlgeschlagen.
Benutzt DIAdem beim zweiten und folgenden Aufruf einer TDZ nur noch das DataPlugin und nicht den Anwenderbefehl?
Was muss ich ändern?
Gruß,
Frank

Hallo Frank,
Wenn Sie schon ein DataPlugin fuer die TDZ Dataein haben, wozu brauchen Sie ueberhaupt den UserBefehl? Also, laut der Fehlermeldung wuerde ich vermuten, dass das DataPlugin immer die selbe temporaere TDM und TDX Dataeien benutzt. Ich tippe darauf, wenn Sie stattdessen im DataPlugin TDM und TDX Dateien derselben Dateiname der urspruenglichen TDZ Datei (und im selben Verzeichnis) erstellen lassen, dann wird es wohl klappen.
DateiName.TDZ ==> DateiName.TDM + DateiName.TDX
Brad Turpin
DIAdem Product Support Engineer
National Instruments

Reading TDM/TDX files from PHP5

Hello,
Did someone know if a library exist to read a TDM and TDX file from PHP?
I would like to plot som data from a TDM file on a webpage. The web server is running on Linux...
Thanks,
Yannick

This might not be trivial. The TDM (XML-based) file uses several advanced XML techniques, so you'll need at least XPath in order to address objects in the file. Furthermore, you will need to gather information from different objects that are invisible in the user interfaces of DIAdem and LabVIEW. Not sure if they're documented. A proper description might be up on www.asam.org, but it is not going to be fun to read
I have tried to use XSLT to publish hierarchy and properties of a TDM file as HTML, but gave up on it since handling of the # pointers was a nightmare.
I'd love to hear about a successful approach.
Herbert

How to convert Labview log file to text file?

I want to open the log file in Excel or other text editor. Is there any special format of Labview log file? I thought it just binary, so I used a general program to convert binary file to Ascii file. But it failed because of the format of the log file format. Is there any other way that I can read log file in Excel? Thanks a lot.

Dennis Knutson wrote:
Are you refering to the front panel logging option? The actual binary format is going to depend on what controls and indicators you have on the front panel and their data types. There is an example of using the file i/o functions to read one of these files in chapter 14 of the user manual. The problem you'll have if you write a program to read a log file is that every time you add or delete a control/indicator, you'll have to rewrite your program and then you'll be unable to read older log files. You'd be better off writing your own log routines. Then you would control the binary format. There are shipping examples that you can look at for fbinary file storage.
Yes, I am referring the front panel logging option and I will read the maual first. Thank you very much for your help.

How do I convert an html file to text?

To get to the file I need in text, I have to click on an html link. This opens an html page of data that needs to be imported with the Text Import Wizard. My instructions are to go to the top of the browser click on "View" and select "Source". This only opens the data in html code and will not save as a .txt file.

If you want just the visible text of the page, use File > Save Page As, and change the drop-down to "Text Files".
But if you want to describe the purpose of saving the page in a little more detail, someone might have a better suggestion.

Convert TDMS to CSV

Hi, im looking to convert a TDMS file to CSV, can anybody help with this ?
Regards
Birdy830

Birdy830 wrote:
Hi, im looking to convert a TDMS file to CSV, can anybody help with this ?
Regards
Birdy830
So this isn't always easy but in some cases it is. If I ask to convert a Word file to Text can you do it? Well it depends, does my Word file have charts, pictures graphs? Does it have formatted text or hyperlinks? Then if you saved it as text alot of that information will be lost.
Same with TDMS. TDMS is not a flat file structure and saving it to a CSV which is essentially flat means you will lose some data. But just like in Word, if you aren't using any of those extra fancy features then you might not care if that information is lost.
TDMS has 3 levels, File >> Groups >> Channels. You start with just one file, but it may have multiple groups, which may have multiple channels, which generally have multiple samples. If you have just one group then you can save just that group to a CSV where you have channels as columns and samples of those channels as rows. But even if you only have one group, all of the properties of the File or Groups, or Channels will be lost unless you get creative on how to save that to a CSV too.
So so summarize, if you only have one group, and if you don't mind only saving the data and not the properties, then it is straight forward. Use the TDMS Open, then TDMS read providing the group, channels, and the data type to read (hopefully they are all the same so you can read them all at once). Then close the TDMS file. Then use the Write To Spreedsheet File giving it the 2D array of signals you read and use the comma as the delimeter.
Unofficial Forum Rules and Guidelines - Hooovahh - LabVIEW Overlord
If 10 out of 10 experts in any field say something is bad, you should probably take their opinion seriously.

How to convert Oracle *.dmp files into something that SQL can read ?

Is there a method I can use to convert Oracle *.dmp files into .txt files? .xls files or something??
Any and all suggestions appreciated!
Thanks,

Hi
you can't convert your .dmp file into text or xls file though you can see the contents of your .dmp file using parameter SHOW=Y in your import command. It will just show the contents of .dmp file and will not import the objects.
Regards
Ilyas
<BLOCKQUOTE><font size="1" face="Verdana, Arial, Helvetica">quote:</font><HR>Originally posted by ():
Is there a method I can use to convert Oracle *.dmp files into .txt files? .xls files or something??
Any and all suggestions appreciated!
Thanks,<HR></BLOCKQUOTE>
null

How to convert tdms to ascii files?

Hello,
I need to convert *.tdms files to an ascii file. I have 16 channels and scalling coefficient information in the tdms file, With the TDMS-Image Viewer i can see the 1-D array waveform perfectly, but I cant write it to an ascii file. When I use a signalexpress.vi or the spreetsheat.vi for writing an LVM/ascii file, information gets lost. (Red symbol at INPUT!!!!)
Please answer me, because I dont have lots of experience with labview and an ascii file is more easier to handle for me! I found only export to matlab and exel, but i just want it in an ascii file. Reading the tdms and opening it is no problem, but connecting the right blocks to the 1D array waveform without dataloss doesnt work.
thank you for reading
danny

Thank you for reply,
i have the new version 8.5. With signalexpress.vis i can do asciis but the red symbol (at input) is there so i dont want to get information lost.
The tdms file has header information for scalling factors and unscalled data for 16 channels.
so because tdms files are faster for writing i want to convert them to ascii with a Convertion Vi, but it seems that with an express vi he stops because it cant handle handle with the headerinformation.
now i use the signalexess vi to write tdms data, before i did it manully by setting channel and group information.
Please tell me if the red symbol AT input of a Signalexpress VI does matter? its a 1D array wavefrom that goes in to the input.
thank you for this discussion, i hope that i dont need to use the matlab import option for tdms!!
greetings danny

How to convert tdm files to lvm files?

I am trying to convert a number of TDM files to LVM files. I got error (2553) when I execute my VI. I dont know why.
1. Can anybody help me? I attached the VI.
Thank you.
Hyunseok
Attachments:
Conversion TDM to LVM.vi ‏121 KB

Hi Hyunseok
I changed your VI to a single file converter (see attched VI) and it works out well with LabVIEW 2009. Is there any special within your TDM files? Can you provide an example file which does not work?
Additionally I'm curious why you want to convert TDM to LVM since there are a bunch of tools to directly work with TDM files in other applications (Find Resources for Reading and Writing TDMS Files in Third-Party Products)
Stefan
Attachments:
Simple Conversion of TDM to LVM.vi ‏61 KB

Converting tdm to lvm/ working with large amount of data

I use a PCI 6251 card for data aquisition, and labview version 8; to log 5 channels at 100 Khz for approximately 4-5 million samples on each channel (the more the better). I use the express VI for reading and writing data which is strored in .tdm format (file size of the .tdx file is around 150 MB). I did not store it in lvm format to reduce the time taken to aquire data.
1. how do i convert this binary file to a .mat file ?
2. In another approach, I converted the tdm file into lvm format, this works as long as the file size is small (say 50 MB) bigger than that labview memory gets full and will not save the new file. what is an efficient method to write data (say into lvm format) for big size files without causing labview memory to overflow? I tried saving to multiple files, saving one channel at a time, increased the computer's virtual memory (upto 4880 MB) but i still have problems with 'labview memory full' error.
3. Another problem i noticed with labview is that once it is used to aquire data, it occupies a lot of the computer's memory, even after the VI stops running, is ther a way to refresh the memory and is this mainly due to bad programming?
any suggestions?

I assume from your first question that you are attempting to get your data into Matlab. If that is the case, you have three options:
You can treat the tdx file as a binary file and read directly from Matlab. Each channel is a contiguous block of the data type you stored it in (DBL, I32, etc.), with the channels in the order you stored them. You probably know how many points are in each channel. If not, you can get this information from the XML in the tdm file. This is probably your best option, since you won't have to convert anything.
Early versions of TDM storage (those shipping with LV7.1 or earlier) automatically read the entire file into memory when you load it. If you have LV7.1, you can upgrade to a version which allows you to read portions of the file by downloading and installing the demo version of LV8. This will upgrade the shared USI component. You can then read a portion of your large data set into memory and stream it back out to LVM.
Do option 2, but use NI-HWS (available on your driver CD under the computer based instruments tab) instead of LVM. HWS is a hierarchical binary format based on HDF5, so Matlab can read the files directly through its HDF5 interface. You just need to know the file structure. You can figure that out using HDFView. If you take this route and have questions, reply to this post and I will try to answer them. Note that you may wish to use HWS for your future storage, since its performance is much better than TDM and you can read it from Matlab. HWS/HDF5 also supports compression, and at your data rates, you can probably pull this off while streaming to disk, if you have a reasonably fast computer.
Handling large data sets in LabVIEW is an art, like most programming languages. Check out the tutorial Managing Large Data Sets in LabVIEW for some helpful pointers and code.
LabVIEW does not release memory until a VI exits memory, even if the VI is not running. This is an optimization to prevent a repeatedly called VI from requesting the same memory every time it is called. You can reduce this problem considerably by writing empty arrays to all your front panel objects before you exit your top level VI. Graphs are a particulary common problem.
This account is no longer active. Contact ShadesOfGray for current posts and information.

Can't convert TDM to TDMS without channels

When using the "Convert TDM to TDMS.vi" on TDM files that only have ChannelGroups and no Channels.
This VI will stop adding Data after the 1st ChannelGroup without a Channel.
It appears to be a small bug with the VI. The problem is that internally it produces an error code (not an error) to say an object has no data.
This is never cleared so every loop iteration will be skipped because it thinks there is no data.
I've have now fixed this VI (see attached) it would be nice to see this updated in a future release of LabVIEW
Simon Holman
Software Engineer
Certified LabVIEW Developer
Certified TestStand Developer
measX GmbH & Co. KG.
http://www.measx.com
Attachments:
ConvertTDM2TDMS.zip ‏57 KB

Thank you much. We'll take care of it :-)
(CAR #179376)
Herbert

How to convert tdms to standard bin?

Is there any tool to convert tdms files into standard bin files? I would like to convert the tdms in a standard bin file to open and analyze it out of Labview. Converting the tdms to a sound file wave or aiff file would also work. Thank you.

mcas wrote:
Thank you. The "standard" bin format I need has to include one single header of 1 Bit and must be 16 bits. Is there any tool available to convert tdms to this bin format? thank you very much.
That means absolutely nothing. 1 bit of what? What does the 1 bit represent? 16 bits of what? What do the 16 bits represent? Are you saving values as 16-bit numbers? As I noted, there is no tool to convert TDMS files to bin files since the format is user-specific. You need to use the Write Binary FIle VIs to generate your binary file.

Convert .tdms to .lvm?

I am creating .tdms files during testing that I would like to convert to .lvm files post test. The files are around 500k lines so I need to split them up into multiple files for older versions of excel. When I read the .tdms data into a Write to Spreadhseet File set up to write to multiple files, it does not work. I get one file.
If I break the .tdms data up using offset and length on the .tdms read, I lose continuity on my time stamp. I would really like to be able to share .lvm files rather than having people download the .tdms reader for excel. Any suggestions?
Solved!
Go to Solution.

Hi deskpilot,
I'm a little confused, I ran your VI with a randomly generated TDMS file, and came out with a few text files, and the time on each of the text files seemed to be correct.
Time at the end of the first text file:
Time at the beginning of second text file:
The only change I made
to your code was to generate the file name a bit more cleanly. In your
method, the file name used as the base for name generation was
interpreted as a folder, and you ended up with files with no extension
and just an auto generated number.
Message Edited by Captain Kirby on 07-10-2008 05:59 PM
Asa Kirby
CompactRIO Product Marketing Manager
Sail Fast!
Attachments:
TDMS to Excel.vi ‏92 KB
Time at End.png ‏4 KB
Time at Beginning.png ‏4 KB

Convert TDMS to TXT

Hi,
I am trying to convert a TDMS file to a TXT file. I want:
1. Convert Data Set (File) properties
2. Convert Channel Group properties
3.. Convert all the data.
The TDMS file "sc1616.tdms" is attached below. The attached "Convert TDMS.vi" can only convert one group data. I want to convert all the data. The TXT file will be like the attached "sc1616.txt".
Any help will be appreciated.
Steve
Solved!
Go to Solution.
Attachments:
Convert TDMS.zip ‏22 KB

Thank you very much. I made it almost work. But there is one more problems. The data order I wanted in the text file (See the attached text file) is :
File Properties
Group Properties
Group Data
Group Properties
Group Data
Group Properties
Group Data
But now in the text file is:
File Properties
All Group Properties
All Group data
Any help will be appreciated.
Steve
Attachments:
Convert TDMS.vi ‏19 KB
sc1616.txt ‏6 KB
Convert TDMS1.zip ‏24 KB

ALL MY DESKTOP APPS CONVERTED TO PDF FILES.

After sending an urgent email attachment in Adobe PDF to Government Offcom, all my Desktop applications in windows 7 64 bit have been converted to PDF files and cannot be opened.   The attachment used was sent to me by my Secretary remotely using an old MAC.
I can return my laptop to normal operation by un installing my Adobe Reader 11 app, but the problem returns when I re Download Adobe Reader
11 again.     After discussing this with Adobe Technical in London they advised me to raise this issue with your Adjudicators in this Forum.
Please assist asap as this is very urgent right now for several genuine reasons.
Many thanks.   Derek Horder.

See if anything in here helps: https://helpx.adobe.com/acrobat/kb/application-file-icons-change-acrobat.html

C/C++ routines to convert tdm/tdx files to text

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