Save as TDMS file as Zip

Hello,
I've been trying to save my created TDMS files as ZIP. Then I want to give password to my ZIP file. Could I do them programmatically?
Yasemin Barutçu
Electrical And Electronics Engineer

Hi Yasemin,
you could use any command line zip tool you want and provide all options through the SystemExec function...
Best regards,
GerdW
CLAD, using 2009SP1 + LV2011SP1 + LV2014SP1 on WinXP+Win7+cRIO
Kudos are welcome

Similar Messages

Can I save a TDM file without its TDX data?

I have hundreds of data files that have been sorted (by date). In certain cases, I want to analyze subsets of this data in particular groupings. I would like to save these groupings in a TDM file but I don't want to another copy of the bulk data. However, I notice that if I save a TDM, it automatically saves the TDX, and I'm not sure it's possible to save/open a TDM without its same-name TDX file. Does anyone else have a similar need and/or know of a data management method that can suit my need?
Thanks.
Solved!
Go to Solution.

Hmm... But it seems that the TDMS file simply puts all the information in a single file and, in the end, is almost as big as the TDX file. What I'm trying to do is only save the meta data but not the bulk data, since I already have a copy of the bulk data in another set of TDM/TDX files.
Maybe I'm asking the wrong question. Here is a simplified example of what I'm trying to do:
I have several (let's say, 6) original TDM files. Each of these original TDM files have 20 or more channels. I've created a new TDM file, pulling out only 5 of the channels from each of the original TDM files but organizing them into 6 groups corresponding to the original 6 TDM files. From this new TDM file, I've created a TDR file where the plots are based on the 6 channel groupings. Due to this TDR to new TDM association, I think I need to save the new TDM. However, that means I now have a new giant file that contains duplicate data from the original TDM files. I don't want this duplicate data. Being very new to DIAdem, maybe I'm just going about this the wrong way because I haven't figured out the "right way" to accomplish my needs. Can anyone advise?

How can I open a tdms file and replace a subset of data then save that change without re-writing the entire file again?

Hi all,
Is it possible to open a tdms file and make a small change an an array subset then save the file without having to save the whole dataset as a different file with a new name? That is to say, is there something similar to "Save" in MS Word rather than "Save As"... I only want to change a 1D array of four data points in a file of 7M data points.
I am not sure if this make sense? Any help is apreciated.
Thanks,
Jack

You can use either one, but for your application, I would use the synchronous. It requires far less setup. When you open the file, set both enable asynchronous and disable buffering to FALSE to enable you to use synchronous with arbitrary data sizes.
Attached code is LabVIEW 2011.
This account is no longer active. Contact ShadesOfGray for current posts and information.
Attachments:
UpdateTDMS.zip ‏20 KB

How do you save arrays in tdm files?

Hi,
As part of a university project I am trying to save some program data to a .tdm file. On each channel I wanted a number of different types of data including an analogue wave form and a couple of 1-D DBL arrays. I have found an NI presentation that says that you can store arrays in them but dont seem to be having any luck. Any ideas what Im doing wrong? I am using labview 8.5.
Regards,
James

Hi James,
in a channel, you can save only one array as data. If you want to save more arrays then use several channels. You can organize them in groups. If the arrays must be in the same channel, then convert them to a spreadsheet string (in string palette) and save the string as a property.
Greetings,
shb

Save wavefromgraph data of format [f0,df & magnitude)into TDMS file

How to save Wavefrom Graph data into TDMS file including fo & df along with the magintude.
I am able to save magnitude alone which is not correct ,coz i have f0 & df also needs to be saved in order to calculate some values
pls see the below image which shows the i/p format to the wavefrom graph. Also pls do the needful help. .
Attachments:
Waveform.png ‏11 KB

Hi, check this link
Simultaneously Write and Read TDMS Data.......
https://decibel.ni.com/content/docs/DOC-7982

How to save tdm file from GPI extension DLL

Hi,
Is there any way to save data channels to tdm file format from GPI extension dll.
I've tried lDataSave function, but I get DAT file format.
I've also tried using Diadem.TOCommand interface, It'works with CmdExecuteASync method, but not with CmdExecuteSync (I've thought using a new thread with CmdExecuteASync, but what about synchronization ?).
As I need to run a process like, do something, save tdm file, then do another thing, I'm a little lost.
Thanks for any suggestion.
JMA.

Hello!
First: I have no solution!
Second: Some remarks to using a OLE interface to DIAdem in GPI.
My experience is that there are only few situations and circumstances where it might be the only way to solve a problem. There are some critical things to know. If you create a ToCommand interface it isn't guaranteed that you get an interface to the proccess you are running in. In normal cases it will be but you can't be sure! CmdExecuteSync doesn't work because usually your command is initiated out of a script. While running a script DIAdem will not execute another command.
The problem with CmdExecuteASync is that the command will be put onto the DIAdem command stack. It will be executed after the script is finished. You can not be sure that the channel data is the same as it was at the time you called CmdExecuteASync. Multiple Calls to CmdExecuteASync will be executed after another.
Sorry that I do not have a solution but perhaps I can avoid some frustrating DIAdem-OLE-Test-Sessions.
Matthias
Matthias Alleweldt
Project Engineer / Projektingenieur
Twigeater?

Save multiple sample rate data to TDM file

Hello, LV connoisseurs
I use 2 Multifunction boards and LV 7.1 to gather slow and fast data simultaneously, 'slow' being 10 temperatures at 150 Hz, 'fast' being 12 pressures at 15 kHz, rate factor between slow and fast is constant 100. My acquisition is set to 'continuous' with blocks of 15 and 1500 resp., so each sample set takes 0.1 sec.
Currently, I use 2 loops, one for each board. Slow data are written to .lvm, fast to .tdm, and this works fine.
But I wonder if in this configuration it might be possible to
- use one loop only (yes, trivial) with the main target being to
- write data into two channel groups of one .tdm-file, one for the 'fast' the other for the 'slow' data?
If at all possible, would this require the consumer/supplier scheme such as to allow the interspersing of data or can I do this directly?
Thank You for your input.
Michael

Just to make the distinction, you should probably be using TDMS (the S stands for streaming) instead of TDM if you are continuously writing data. TDM is more for writing a snap-shot and doesn't work so well for continuous data (big memory leaks last time I used it back in '06).
Also, as no time data is stored you probably also want separate timestamp channels then for your fast and slow data.
As mentioned, it is no problem having multiple writing loops using the same TDMS reference.
nrp
CLA

How does DIADEM import TDMS files? How gets every channel his number and groupindex? How can I determine which channel has which groupindex and number?

I store different channels in a TDMS file.
I like to have a time channel at the first position with group index 1 and number 1.
When I read the TDMS file with DIADEM the time channel (Float64) is on a differernt position, and the channels are not sorted alphabetically.
Here are my questions:
How does DIADEM import TDMS files?
How gets every channel his number and groupindex?
How can I determine which channel has which groupindex and number?
Best regards
Joerg

Hi Jörg,
i suppose that you´re programme whose create the *.tdms file is writing on false position. Try to create datas with timechannel on first indes in diadem, then save it and then open it again. you see that all is correct. So please tell me what programm in what version do you use and please attache it here.
Did you use the library for creating *.tdms files like in the link ?
http://zone.ni.com/devzone/cda/tut/p/id/6471
Here you find the gtdms_8.x.zip - when you extract it and opened the *.llb you find vi´s for all functions e.g. writing 2d array of strings to *.tdms file
when you open the subvi´s then you see how created and writing datas/structure to *.tdms files. Because *.tdms is binary you can´t see structure with open it in editor.
When you don´t have Labview you can use the 30 days test of current version 8.5 under following link
german version download link
https://lumen.ni.com/nicif/d/lveval/content.xhtml
english version download link
https://lumen.ni.com/nicif/us/lveval/content.xhtml
Hope it helps
Best Regards

How to store data (in tdm files)

I'm looking for advice on how to store data in tdm/tdx files.
The main challenge is like this: At regular time intervals there is new data available (say every 10 minutes there are 10 minutes of new data available). All data is time based. So every ten minutes I may create a new tdm/tdx file containing this data segment. However, when i want to analyze the data i dont necessarily want to view 10 minutes of data from all channels, but maybe 20 hours of data from one particular channel.
The way I've achieved this so far is to manually load each 10 minute segment of this particular channel and then add these parts together. This is both time consuming and cumbersome. Is there a better way to do this that I've simply not discovered yet? Is there a better way to store data to simplify this process?
One solution is of course to save data from several 10-minute frames in one file, but seeing as there is a never ending supply of data i cant simply save all data in one giant file, it has to be split up at some point, and the problem will still remain.
One factor to have in mind here is that this is rather large amounts of data (maybe 10GB each day), so the option to simply load all the data into memory goes out the window rather quickly.
Feel free to ask if I've not made myself very clear

Hi salte,
If your test ever ended, and if you had LabVIEW 8.20 or higher, I would recommend using a TDMS file, which handles data appeands flawlessly. DIAdem 10.1 now also does data reduction and index windowing during file loading for TDM / TDMS / DataPlugin files, so that you could easily load out only the part of the file you wanted to look at. But since you describe your data acquisition as never stopping and amassing 10 GB per day, I agree that it would be impractical to use only 1 data file. So we are stuck with some number of files which each contain a part of your measurement. This approach can have advantages, since you can save operational properties for each "buffer" such as average value, dominant frequency, ambient room temperature, etc., and later on you can use the DataFinder to query out only the data buffers which meet specific conditions based on these properties. The problem remains to load and assemble data based on multiple files. This is an old problem in DIAdem, and one for which I have an efficient and I hope satisfactory workaround application. It does what you describe already doing in the minimum amount of time and with the minimum amount of user interaction, and it can be highly parametrized to suit your particular situation. The ideal way to start the application would be as part of a ResultsList custom menu. This would enable you to query out the buffers you wanted, highlight those rows in the ResultsList, right-click and choose your custom menu, and WHAM! the selected buffers for your queried channel(s) are automatically appended together in the DataPortal. Launching from a ResultsList custom menu would mean that you could skip the file dialog and just read out the data sources directly from the ResultsList selection.
Let me know what you think,
Brad Turpin
DIAdem Product Support Engineer
National Instruments
Attachments:
Importing Data from Multiple DataPlugin Files.zip ‏198 KB

Can't un-write protect TDM files

I am using the storage VIs to manipulate a TDM file that was created using the TDM header writer API. When I try to do any operations on it (specifically, deleting a channel), i get error -2561 "Data storage is write-protected.". I have checked the permissions on the file and they should be correct.
I ran some tests and found that i can create a TDM file using the storage VIs and delete a channel without any issues. According to LabVIEW, the file created using this method has the same permissions of the problem file.
Do you think this could be a bug with the TDM header writer VIs? Or am i missing something obvious?
I have attached files showcasing the issue.
Thanks in advance for any help.
Attachments:
TDM test.zip ‏131 KB

Bazookazuz-
The standard is described in the Developer Zone described above. TDM files are binary files written such that it follows a particular pattern. That way the data can be easily retrieved and interpreted later. It is written in the fashion to save disk space and to be created/modified quickly. All TDM files acquiring data from multiple channels follow the same format alternating between each channel taking each sample (also described in the Developer Zone article). By converting the data to End-to-End, it makes all the data for each channel together.
In order to distinguish between the modified and unmodified tdm files, there is no way to just look at the file type and know without a naming scheme. Programmatically, you can parse out the first few data sets and see if they are the same channel and then you can determine from there.
Regards,
Mike S
NI AE

Saving FFT PSD waveform to TDMS file maintaining x-axis scale

Hi all,
I'm having trouble saving a Power Spectral Density waveform to a TDMS file because the method I'm using is losing the x-axis (frequency) scaling. The only way I can get it to save is extracting the magnitude from the waveform and saving that in the TDMS file. This loses all the frequency information.
Does anyone know how I can save the PSD information in a TDMS file or failing that, any type of file?
Thank you,
Donners
Solved!
Go to Solution.
Attachments:
PSDs Frequency 2.JPG ‏89 KB
Data Calculations TDMS 4.zip ‏120 KB
Filtered Data.zip ‏240 KB

Hi,
As my understanding, you are trying to log the PSD to "Power Spectral Density" channel, but you do it wrong with double array. TDMS write don't accept cluster as input, but accept waveform. I have updated the VI and the PSD in TDMS file viewed as
Attachments:
Data Calculations TDMS 4.vi ‏177 KB

Error reading TDMS file with inconsistend dt

Hello all,
I would like to ask your help to understand how to read a TDMS file which I am opening and closing based on a user input. As a result the data in the TDMS file does not have a consistent time step, which may be causing my problem, but I really don't know. I keep getting the error 2501, that I have an invalid reference.
Or, if I continue and bypass the error, the extract portion VI gives me an error stating that I need to define an integer multiple of dt.
I am not sure how to solve the first point as I have the reference wired directly to the read TDMS vi.
I have attached a screen shot of the error and the portion of the VI with the offending error (it is the code connected to the read TDMS read vi).
My goad is to extract a portion of the data to do calculations on and display a result to the user.
thanks for any comments.
A. Lopez
Attachments:
error-2501.JPG ‏198 KB

I think you open multiple times the same TDMS file, you should open it before the while loop. And I don't see a close tdms function...
Also check for errors on the open TDMS function.
Ton
Message Edited by TonP on 02-14-2007 07:45 AM
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Newly written tdm/tdms file not found

Hi,
I am trying to save some simple thermocouple data to a tdm/tdms file. I run my vi and it seems to work just fine. I am using the NI 9213 getting started example as a basis and have added tdms open, tdms set properties, tdms write, and tdms close. I can see the data streaming on the waveform chart but when I hit stop and go look for the saved file I can't seem to find it. What am I doing wrong?
Thank you
Solved!
Go to Solution.

SRamirez wrote:
I set it to create. When I run it once for a new folder it runs just fine but if I try again I get error 6.
You are specifying a folder? You should be giving a full file path (like c:\temp\blah.tdms). What you might want to do is build a file name based on the data/time. This way you won't have to worry about overwriting files and what not.
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Attachments:
Build File Name.png ‏9 KB

How to compare signals from two different .tdms files?

i'm developing a lie detection system in labview.so inorder for that i need to compare the threshold physiological signals from the .tdms file with the signals i acquire continuelsy from the subject for each question asked.i use respiration monitor and heart beat monitor together with the sensorDAQ to acuire the physiological signals.so which are the function i should make use of?i have the following toolkits
1. advanced signal processing toolkit
2. adaptive filter toolkit
3. digital filter design toolkit
4. biomedical toolkit
please give me advise on this.
thank you.
Solved!
Go to Solution.

Lie detector systems (polygraphs) generally work by looking at the physiological responses to the own subjects baseline, and do this in real-time. You could use a file that represents the stored "baseline" for the subject, but the overall environment, circumstances, general state of the subject, etc. may not be similar enough to easily see subtle changes.
From the stored file, you might determine a set of parameters or thresholds that indicate "normal, relaxed" for each signal. You could read the file into your LabVIEW program, process each channel, and save these parameters. Then when you have the new data, you can read the new data file in and process it in a similar way and then determine whether the parameters are outside the limits that you established for a "lie".
You may get more responses to this question if posted in the Biomedical User Group
Visit the NI Biomedical User Group at:
www.ni.com/biomedusers

Path in Classpath for file SapMetamodelWebdynproContent.zip not found.

How to get rid of these warnings?
               [Warning]: Path in Classpath for file SapMetamodelWebdynproContent.zip not found.
Warning               [Warning]: Version for file SapMetamodelWebdynproContent.zip not found.
Warning               [Warning]: Versions of 'SapDictionaryTypeServices.jar' have different prefix.
Warning               [Warning]: Versions of 'SapDictionaryTypesRuntime.jar' have different prefix.
thanks in advance.

Hi,
This is a common problem when you import projects to NWDS. Do like this.
1.Change to Navigator tab in NWDS and delete gen_wdp folder.
2.Switch to Web Dynpro Explorer. Select the Project -> Right click-> Select properties -> in the wizard select Java Build Path -> Select Libraries tab -> You will find jar files with warnings
3.Remove the jar and add the jar file with same name to the project one by one.
4.For each jar file repeat step 3.
5.Save the project
Or
removed the read-only property from all folders / files of the project and it solved my problem.
Hope this helps!!
Thanks & Regards
Vijay K

Save as TDMS file as Zip

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