Read file measured (bad)

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• Read file measure to XY Chart of waveform

  Something pretty simple that gives me a hell of a time right now.

  I have a .lvm here who was rescued from an acquisition of data and has a column of numbers from 0.0000 - 27.0000 to very small no. The next column is the amplitude of the signal at the point. Now this file LVM I'm starting a new vi and I want to read those values x and Y and get them on a waveform graph. Now, I tried hanging 'Reading a file measure' and tried to "Build the Table", but who do not want to connect on a chart. Rather the file directly on a chart causes two very different lines is displayed but is no where near what I'm looking for.

  Some tips on how to complete it?

  Tasty,.

  More often than otherwise, I find screw Express to be more trouble than they are worth. Here is an example of reading data tab delimited in a .txt and tracing the values of are against X a value on a chart. It will be useful.

  Andrew

• Read file measure that VI does not work

  Hello experts!

  I want to display a previously saved tdms file in another vi. But I kept getting error 7, and the data does not appear in the graphical indicator... (see the attached jpeg file)

  Here's the PDM file: https://drive.google.com/open?id=0BwSzf9jm9UeNOEtFaE1CUVpKS1E

  I have also attached my vi to this post.

  Please help :-(

  Thank you!

  I see the problem.  It is the code that runs on a myRIO.  You think the myRIO as another computer.  But there is no access to your C drive.  If you want the myRIO to play the file, you must first set the file on the myRIO (via FTP or WebDAV) and point your control over the file on the myRIO.

• usefulness of reading the measurement file express vi

  Hello

  I found reading file express vi measure in LV7.1 does not read from the beginning of the file when you run it the second time. Instead, it resume from where it left off last time. Usually, the user would read the entire file measure each time. So when you try to read the second time, it will show an error window saying that it has reached the end of the file (because he was reading the entire file first).

  I wonder how useful to resume from the last stopping point is? Is there a way to start over each time that the VI excute it?

  I'm sure that's how reading file measure works 90%. Whenever she is called in a single run of the application, it will start off the coast where it was stopped. You will need to work with the low level screw to get what you want to do.

  This Express VI works in a similar way the screws and the following functions:
  Open/create/replace file
  Read text file
  Read binary file
  Read the spreadsheet file
  File dialog box
  Scan to file

  And, you can always use the node to set the file Position to set the position at the beginning of the file.

• read from file measurements

  Hello. I want to read the data file (lvm). My data has only two columns. This file of lvm have the header of line 1 to line 22. So I put the "start line of numberic data'"reading of the measuring of file"is 23. However, it does not work. So I have the postal code and the data here file. This forum, I cannot download the file lvm. So I save txt extension. Can someone help me get the data of this. If I remove the header in the data file, I get the data in 2 columns. Thank you

  Hello, I do not understand why the Express VI does not work here, but I would highly recommend to avoid using Express VI and type of dynamic data 'wrong' here (not useful and information hiding).

  Just use a spreadsheet VI, as in this way, you get directly you need:

  

  Edit: and please, don't create duplicate messages: http://forums.ni.com/t5/LabVIEW/read-data-from-file-measurement-lvm/td-p/3116373

• How to find the sampling frequency to read the measurement file

  Hello

  I would like to find/extract the sampling frequency of a .lvm file.

  Right now I am using the VI 'read file of measurement' and my data charge fine and all, but I need the frequency of sampling for certain calculations.

  I know the header of the file .lvm that the sampling frequency is 1613Hz, but I want to get this automatic information from the open file .lvm.

  Tried to find an express vi that could give me the answer, but I could not find a

  I'm sorry if this question already answered, but I could not just to find the answer.

  I hope you understand what I'm doing!

  Thank you

  Kind regards

  Tommy

  The timing is part of the production of signals information. Never use the functions of the Express, but you can use DDT to and convert to one of the data types of waveform. Waveform components then turns the dt.

• How can I write snapshot of my data to the file measured every 5 seconds

  Hello

  I try to take a snapshot of my stream once every 5 seconds and write it to a. File LVM. I have problems with the VI "write to a measurement file. The pace at which it writes data to the file seems to be dictated by the 'Samples to Read' parameter in the DAQ assistant. I tried placing the VI 'Write in a file measure' within a business structure and the launch of the structure to deal with a "time up" VI. As a result only in a delay of 5 seconds before the insiders 'Write in a file as' VI. Once the VI 'Write in a file as' is launched, it starts writing at 20 x per second. Is there a way to change it or dictate how fast the exicutes VI 'Write in a file measure'?

  My reason for slowing down the write speed are, 1) reduce space occupied by my data file. (2) reduce the cycles of CPU use and disk access.

  The reason why I can't increase the value of 'Samples to Read' in the DAQ Assistant (to match my requirement to write data), it's that my VI will start to Miss events and triggers.

  I don't know I can't be the only person who needs high-frequency data acquisition and low-frequency writing data on the disk? However, I see a straight road to key in before that.

  The equipment I use is a NI USB DAQ 6008, data acquisition analog voltage to 100 Hz.

  Thanks in advance for your help

  See you soon

  Kim

  Dohhh!

  The re - set feature has not been put in time elapsed VI!

  Thank you very much!

  See you soon

  Kim

• Not able to read files audio wma

  I myself had this new cool device and everything is working fine beside it is not able to read files audio wma.
  It works without any problem on my Samsung android phone, but on my Slate7 it says format not supported in specifications indicates that it is supported.
  I installed the same player that I use on my Samsung android phone, any suggestions I should do to fix this?

  To my knowledge 4.1 Android doesn't have the necessary codec to play default WMA files. Please see the compatible audio formats listed by Android developers:

  http://developer.Android.com/Guide/Appendix/media-formats.html

  However, for me MXPlayer/VLC works to play WMA files. You can try this one, and there is no harm to try. Two of them are available on PlayStore. You can uninstall them if you don't like them or if they do not meet your needs.

• Bootcamp - Windows 10 should not see or read files from the disk HARD Apple intern.

  I have just successfully Windows 10 next OS X on my 15 "Macbook Pro mid-2014.

  Windows 10 should not see or read files from the disk HARD Apple intern.

  Should which driver I uninstall?

  On OSX, if the following Terminal command produces any output, then you cannot read partition OSX on the side Windows? FileVault2 will also disable access to the OSX partition.

  Cs diskutil list

• How to avoid the pop-up dialog box? «Read File.vi worksheet»

  I use LV2010 and VBAI2011.

  I use LV to write vi for the UI of my VBAI. VBAI will send the results of the inspection by "Inspection UI update"VI.

  I call an "run a LabVIEW VI" go in the VBAI. This vi contains a subvi "worksheet Read File.vi." the "file path" entry to the subvi is a control of the chain, which will be updated by a value of string obtained in the previous steps.

  What of happen when I run the Inspection, a windows "choose File to Read" will pop up, even if I already updated the "file path" in VBAI. I guess this happens because 'Reading of worksheet File.vi' sub - vi did not wait for the entrance of the "file path", or rather the updating of the "file path" was "too slow."

  How to prevent this?

  
  

• The reference must be closed on a reading-file error or not?

  Dear users,

  When I read a file, a reference is created one should close, when no longer used, should I? Here is a minimal example to my next serious question: should I close the benchmark on reading-file error or not? Is there a created in the case of "the file does not exist"?

   

  See you soon,.

  No, when used in this way, the references created by the file read and write functions should not be closed - thought that he would have no negative effect if you did.

  In addition, you do not want or need the structure case around a reference close the function.

  Mike...

• Problem with reading file xls with text inside

  Hi all

  I have a problem to read the excel (xls) file with the first line containing chains of different length.

  I wonder how can I skip the first line and continue reading of the second line.

  Thank you very much.

  I only have saved VI.

  So here are the names.

  Downstairs: open the file.  Text reading file with lines of selected reading (right click for the menu to find).  Read the text file with lines of reading not selected.  Close the file.  At the top is spreadsheet String to Array.

• Strange backup data by writing in the file measurment

  Hi all

  I developed a simple program that allows you to view the data from one channel, but it saves the data, just at the moment where the data backup button. Data is saved through writing on a file measurment, but unfortunately there is something wrong because the recorded data are strange. In the attachment, there is the file VI and the recorded data.

  As you can see there are several header and dates are strange (i.e. of the registration date 23/12/1916) and I get a lot more sample that I should have. Why do this?

  Any suggestion is appreciated.

  23/12/1916

  Your many headers is perhaps for this reason:

  

• How to restore the documents now say "error reading file"?

  I have a certain recorded documents I can't view... They are still there, but when I try to view them I always get the message "error reading file" many of them are imprtant to me and Iunfortunately cannot replace them. Even when I find out my back up, I still cannot get them.

  Help!

  Hello

  1. what documents do you speak?

  2. were you able to view these files before?

  3. don't you make recent changes?

  I suggest you try to restore the computer to an earlier point and check if it helps:

  http://Windows.Microsoft.com/en-us/Windows7/system-restore-frequently-asked-questions

  It will be useful.

• How to read the measurements of the model eye?

  I'm new in LabView. I use an Agilent54855A to capture a model high-speed digital and want to read these measures of model of the eyes, eyes for example height, width & vice versa of the eyes. However, I couldn't find this VI in the palette.  I can read it on the screen, but do not know how to retrieve through LabView. What should I do?

  Steve,

  Thank you. There are commands to read the eye measures model. I'm changing the existing VI to add these new features and then I will check next week.

  Best regards

  KKNG