Save the record before moving on to the next line in the data block

Similar Questions

• How to save the data of different rates in a single VI?

  Hello

  I tried to acquire 2-channel measurement of voltage at 10 kHz and analyze data, finally to save the data to both 1 kHz and 1 Hz. What I did is this loop of producer/consumer use to do the work of recording at different rates. I have queued all the data in the main loop, and then removed the data and write it to the file in other loops. I added "wait = 1 ms' a consumer loop for recording data at 1 kHz (loop of fast logging) and added" wait = 1000ms' in another loop to get the slow 1 Hz (logging loop) data record.

  My problem is that the data record works fine in the case of 1 Hz, but it does not work for the case of 1 kHz. Although the time-out period defined as 1ms, the interval between two samples in the loop of fast data recording is about 100ms.  Subsequently, 1ms, 10ms, 100ms, 150ms tried in this loop to see what intervals are in these cases. I found that the intervals are same as assigned in the timeout greater than 100 ms, but if the time-out is set to 1ms or 10ms, the intervals are again around 100ms.

  My question is - why I can't reach data record 1 kHz using loop of consumers/producers, while the same way works for the case of 1 Hz?

  Thank you very much

  Hao

  You are sampling at 10 kHz and you want to back up your data "as if you sampled at 1 kHz and 1 Hz", if I understand correctly.  I also understand that you use the design of producer/consumer model to help with this (a good idea).

  I'm assuming that the producer 'product' a segment of data at a time, to say the value of a second of data or a 2 x 10000 I16 (assuming a 16-bit integer A/D) table you put into a queue and wait for the consumer.

  If you have data at 10 kHz, how do you get representations to 1 kHz or 1 Hz?  There are (at least) two possibilities - average data over the interval of proper time, or (re) sample data.  The good thing is that you can handle the situation 1 kHz and 1 Hz, essentially at the same time and in the same processing loop.  I'll discuss the case 1 kHz - with the assumptions I made, the case of 1 Hz becomes almost trivial.  I'll discuss treatment also just one channel, as it is similarly almost trivial to go from 1 to N-channel.

  If you have 1 second of data sampled at 10 kHz, and will "reduce" 1 second of data sampled at 1 kHz.  Note that you have 10 samples for each data point that you want in the end.  The "Averaging" method said "Replace all 10 points in the average of these 10 points", while "resampling" method said "replace 10 points with, say, the first point, ignoring the others.  An easy way to do this is to use the Reshape feature to transform an array of 10 x 1000 elements of your array of 10000 items 1-D 2D.  Now, you can use a loop FOR an average of 10 items or simply extract the first.  [This is where almost everyone, including me, a mistake - when you put a 10 x 1000 2D array in a loop, you get 10 iterations of 1000 items and we want 1000 iterations of 10 items.]  Oops, what to do?  [Simple - converts 2D array before sending in the loop FOR.]

  So when you have processed your 10,000 points and got both 1000 samples "1 kHz" and 1 "1 Hz" sample, you write each of them in their respective folder and wait for the next item in the queue of the consumer.  Consumer focus on the queue loop, it will automatically 'block', waiting for the producer of the 'feed' some data.  Note that the producer generates data once per second, producing 10000 points for the consumer in the process, but the time to deal with these points and perform the required disk i/o should take only a few milliseconds (certainly not more than 100, even if writing to a floppy!), so you don't have much time to do other interesting things (such as display data).

  Bob Schor

• How to use "Write to the spreadsheet" to save the data when I want?

  When I use write on worksheet to record data, I must determine whether to save data or not before running the program, is there a way I can run the program and then decide whether to save the data, which means I can have a 'save' botton After runing the program, when I shoot, I can record data, otherwise, it is not. Thank you.

  
  

• How can I control the writing-data-to - spreadsheet.vi to save the data?

  Hi all

  I tried to draw a wave and save the data to excel. Now, I want to control the writing-data-to - spreadsheet.vi to save data when I want which means that the vi records nothing until I have send a command to it. How can I make this happen or do I need any other screws?

  Nicky

  Hello

  Maybe this wat you are trying to do... Let me know if it helps...

  Kind regards

  amine31

  (Kudos are always welcome)

• Save the data to the excel file

  Hello

  I make a program reads the value of the probe via serial port... but I don't know how I can record this data in excel file... I open the example in the labview example, but I don't want to like this... becaue I use a while loop in my program that cause opened "multi" excel file... . How can I solve this problem?

  You need to think about what you want to do, not how you want to do.  I'll make a few assumptions here - adopt to your notebook loads "real."

  I guess you want to take a series of readings from a device (sensor, serial port).  I suppose you take multiple readings, perhaps their display on a table or chart, for a certain period of time.  Once you have a set of data, you want to save all the data in an Excel file.

  If this scenario is correct, there are three distinct phases to this task - implemented the data collection (open the serial port, manage the interactions of the user according to the needs), data collection (and potentially produce tables or graphs) and save the data.  Note that only step 2, collect data, involves a repetitive action appropriate for a while loop.  Once you have all the data, you can then open an Excel report, use something like Excel table easy to put the Table in the report or chart Excel easy to put a chart in the report and save the report in evidence, save the report.

  If you are using a relatively recent version of LabVIEW (2010 or later), the new generation Excel report screws are pretty easy to use.

• Save the data on the button and then save the data on a spreadsheet on another key.

  Hello

  I am a new user of Labview. I'm developing a Labview 7.1 program that will record data on the keys. Another button, he must stop recording, and then open a file dialog box to save the data stored on a worksheet. I read in this forum that I have run several loops in parallel but unfortunately I can't see the examples because I use an older version of Labview. I tried to do to pass the data in a table, once recording is started, and then I carry the data to write a function that spreadsheet inside an another case statement. However, once I put the writing on the spreadsheet for the case statement he cannot write. I tried to put out the statement box but it save only a single set of data. Sorry if I am not clear with my explanation. It will be greatly appreciated if someone can give me some advice on this.

  Thanks in advance for your information.

  See you soon,.

  Anson

  You want to build a table of data.
  If the Boolean value is true, you will add a data point in the table.

  If it's wrong, you do not add anything, and the loop will be re-iterate.

  In the example below, the same code appears twice.

  Half top shows the case of 'Real' and the bottom half shows the case of 'false '.

  

• All of a sudden I can't type data on registered forms. The purple bar above shows "Please fill out the following form. "You can save the data entered in this for."

  All of a sudden, I can't type data on registered forms. The purple bar above shows "Please fill out the following form. You can save the data entered in the form.

  Program used to complete the form (I guess they are in PDF format)? OPERATING SYSTEM? Versions of both? Forms were filled before you save them?

• How to save the data in table 1 d to Excel in continuous

  Mr President.

  How to save the data in table 1 d to Excel at all times, so that all the data of the first scan must be placed first thought and all the data from the second analysis must be placed on the second Board and continue on the street...

  Sy@m...

  Hi Sy@m

  Here is a vi that might give you a few ideas to try:

• HP 54602 B oscilloscope to view 2 channels and save the data to a file

  Hello

  I use a HP Oscilloscope 54602 B to plot the voltage and current in a circuit. So I need LabVIEW to save the data of the two strings in a file or to have the plot of both channels. I used the "get started" VI with the driver and I am able to get the trace of the 1 channel. I'm not familiar with programming in labview so y at - it someone who has a VI near the VI that I need?

  Thank you.

  Try these.

• Save the data in a horizentall

  Hello

  Any that offered little help on how to save the data in a portrait. As a result of my attachment all my datas saved az a tables!

  And also, I'll be glad if you told me that I can add text in front of my data as an outamaticlly to explain?

  Any suggestions would be greatly appreciated! Thank you very much!

  Sincerely,

  First convert your string numbers using decimal channel number.  Once your numbers have the appearance of a string, you can format the text with them.  If finally, you can use concatenate strings to concatenate (add all channels) your number in the string with another text format:

  

  This code would create the following string:

  

  Then, you can save your all channels on a line using the same method as above.

• How to save the data in a form called?

  Hi all.

  I have two froms.like FORM A and FORM b.

  I have a button on the FORM B.

  When I click on this button, FORM B and FORM data should be store in the database...

  I wrote something like this in the form B

  when_button_pressed->

  commit_form;

  go_form ("c\user\babu\FORM A.fmx");

  commit;

  Here, my problem is when I click on save button only saved FORM B, FORM A not memorizing the data in the database.

  Please help me and tell me where the error...

  Post edited by: N.B.Babu

  I guess that the modules form a calls B with OPEN_FORM module (..., SESSION), IE. Module B works in the new session of database

  (by the way, the database connection is the same, because the connection to a database can go several database sessions).

  Your code cannot save the data in the two sessions of database:

  commit_form; -This saves the data only from module B (because A module work in diferent database session).

  go_form ("c\user\babu\FORM A.fmx");  -Now you in module A.

  commit; -This has no effect, you are now on the module to a.

  Kind regards

  Zlatko

• form created in the ES4 will not save the data entered in acrobat readerXI

  I created a big form in Live Cycle Designer ES4. If I save the form in pdf format and open it in Acrobat Reader XI I get the message that I can't save the data entered in the form only print it. All I want to do is to put the form on our web site for people to download, fill out, save, and send it to me. I consider another method that is if I distribute the form and take the distributed pdf and save it locally, when it is open in the player you get the Send button on the purple bar on the right side. This will confuse many of our users, so if there's a way to not have the submit button so that work, but how do I stop the send on the purple bar button?

  You must activate the reader of the form. You can do this in Acrobat 11 open the form in Acrobat and select: file > save as other > Reader Extended PDF > activate tools more

  11 reader can save non-active AcroForms (created in Acrobat Forms), but not the forms enabled for the XFA (forms created in LiveCycle Designer).

• Cannot save the data

  I get the message "Cannot save the data" every time I try to open a single file CPTX. other files work fine. When I open the file, it gives me that message box, I click ok and another box says "a fatal error has occurred and the application is being completed. "and Captivate closes.

  I cleared the cache. I also tried to find and rename the Preferences folder, but I don't see any preferences folder or file in the \AppData\Local\Adobe\Captivate 5.5\ folder. Any ideas on what I need to do to fix this?

  The preferences folder is the folder "Captivate 5.5' in your profile (users\\AppData\Local\Adobe directory.

  Lilybiri

• I have a trigger to post to the data block request...

  I have a trigger to post to the data block request...

  BEGIN
       IF :SECTION IS NOT NULL THEN
            SELECT DESCRIPTION INTO :BOROUGH FROM C_LOV_BOROUGH WHERE :SECTION = SECTION;
       END IF;
  END;

  Table C_LOV_BOROUGH has many lines
  
  When I scroll quickly after querying data...
  I get the error ORA-01403, after than scrolling up and down... it disappears... someone can help?

  Use a slider instead of direct SQL SELECT as if you can't find all the lines, would not raise an exception, or use an exception handler to handle all exceptions silk-screened - found.

  DECLARE
   CURSOR c_get_desc IS
     SELECT DESCRIPTION
       FROM C_LOV_BOROUGH
     WHERE SECTION = :SECTION;
  BEGIN
  IF :SECTION IS NOT NULL THEN
    OPEN c_get_desc;
    FETCH c_get_desc INTO :BOROUGH;
    CLOSE c_get_desc;
  END IF;
  END;
  

  Second method:

  BEGIN
    IF :SECTION IS NOT NULL THEN
      SELECT DESCRIPTION INTO :BOROUGH
        FROM C_LOV_BOROUGH
     WHERE SECTION = :SECTION;
    END IF;
  EXCEPTION
    WHEN NO_DATA_FOUND THEN NULL;
  END;
  

  Cursor is safer than direct SELECT SELECT because maybe meet TOO_MANY_ROWS exceptions too... but if you use the slider, he realized the first found line extraction and populate the BOROUGH and if it does not find anything, it won't throw an exception.

• Save the data before and after the occurrence of a Trigger Condition.

  Hello

  I am worrking on an application that acquires data from 64 channels and performs many analyses.

  Necessary to implement something is recording the data in the event of alarm condition.

  I've implemented datalogging in many previous applications, but this one is difficult.

  I need to save data for a few seconds before and a few seconds after the alarm has occurred in a single file.

  I thought constantly write data to a file PDM and at the same time deleting the old data, until the alarm trigger occurs.

  but I was not able to do, since I have no blocks to remove data from a PDM file.

  I'm looking for the ideal approach to this recording.

  Any help will be appreciated.

  What I have to do this in the past, use of a queue with loss as a circular buffer.  When you get the relaxation, dump you the data in the queue to your file and then save however many data you want after the outbreak.

  For the purposes of the memory allocation, do not use the queue to rinse.  Use rather a Dequeue element inside a conditional FOR loop with a 0 timeout (reading the queue stops when you have a timeout or you read X samples).