Time for a while loop to run once

Similar Questions

• How to create a control of time for the while loop?

  Hi all

  I want to control my time running of the loop. In other words, I want to stop everything in the execution of the loop after a time (in ms) that is defined by the user. For example user defines Control Panel for 5 seconds before a while loop runs and stops after 5 seconds.

  I don't know is it possible with the while loop. I managed with the timed loop, but this must be wrong with my application. Y at - it of the other loops for timed control if it is not possible with while loop? There is also a simple loop with .vi random number (0-1) as an attachment.

  Best regards

  Jick

  Hi again,

  I managed to solve my problem right after I posted my first message. I did it with the passage of time and the register shift (for the elapsed time of reset).

  Thanks for your replies anyway!

  Best R

  Jick

• loop for and while loop with empty table entry

  Hello

  I have a question with loop and loop.

  When a constant empty array (zero element) is connected to the loop For with "allowing the index", there are no interactions performed in loop For. But, if the loop is replaced by any loop, no problem.

  LabVIEW 2010

  Hello

  It is ok. I have no problem at all.

  For the 'loop' For when you connect the table thanks to indexing, the number of iterations is set to the size of the array. The iteration number assigned to N (in your case 10) is ignored.

  For the 'While' loop the number of iteration is defined by the Boolean Condition and the size of the array is ignored.

  Paul

• Need help to use while LOOP to run immediately

  Hello
  
  I use the Oracle 11 g R2 database.
  
  I need to use 'while' below statement so that I'm going to immediate execution with the following ranges in a LOOP.
  
  USING 100, 200
  USING 201, 300
  WITH THE HELP OF 301, 400
  USING 401, 500
  

  declare
  v_maxseq_id number:=100;
  v_minseq_id number:= 500;
  
  begin
  --WHILE LOOP
  
  EXECUTE IMMEDIATE 'insert /*+APPEND*/all into stage_parsed_while
  select * from STAGE_PARSED_h2 WHERE src_file = ''a'' AND load_date = ''03-apr-2013''
  and seq_id between :1 and :2'
  USING v_minseq_id , v_maxseq_id ;
  
  
  end;

  Kindly help... Thank you

  Your syntax for the While loop:

  set serveroutput on;
  declare
    i pls_integer := 101;
  begin
    while i < 500 loop
      dbms_output.put_line('Min :: ' ||i || '; Max :: ' || to_char(i + 99));
      i := i + 100;
    end loop;
  end;
  
  anonymous block completed
  Min :: 101; Max :: 200
  Min :: 201; Max :: 300
  Min :: 301; Max :: 400
  Min :: 401; Max :: 500
  

  And Yes, I'm agree with suggestion of knapen to accomplish the task with a single static SQL, rather than go for dynamic SQL (which is the first wrong approach) and then using loops to slow further (which would be another mistake).

• Y at - it an easy way to highlight the current iteration of a currently running on the front panel of a for or while loop?

  Y at - it an easy way to show on the Panel before which iteration of a loop is running during the time the loop runs.

  Thank you

  Chuck M.

  Unless I'm missing something...

  

• Measurement of time in a While loop

  Greetings gentleman;

  I'm kinda new to Labview, and although I sought an answer without assignment, I wasn't able to find one.

  So here my question, I would like to know how I can measure the time a loop sequence, in other words, what time is my point of view VI to run the main loop together?

  A little explanation, the attached VI tries to be a Markov chain, it takes some values in the first case structure based on the previus loop, then, if the values are correct, it passes to the next step and so on. It's pretty simple, and yet, my problem lies in the measurement of time. Since it is a 'distribution', it would take infinite time to execute a simple loop if it does not fulfill the characteristics, but it is scheduled to meet them so an average time should work.

  So, if you look to the while loop, should the big one, I want to measure how long I take for a ride.

  Thanks for the help, I'd be happy to read some ideas on how to measure this.

  Kind regards

  IRAN.

  You will find examples in the example Finder OR by searching for 'speed test' or ' reference '.

  Essentially, you create a flat sequence structure inside of your loop. In the first image, you measure the current number of cycles. In the middle frame, you run your code. In the last image, you measure the number of cycles again and subtract the first number of this. This gives you the run time to execute the code.

  You can see a page of the community about it here.

  There is a high-resolution time tick count VI hang out somewhere which is great for benchmarking and improving efficiency, used instead the number of cycles (ms) primitive.

  Edit - remember where he was

  https://decibel.NI.com/content/blogs/EvanP/2010/10/04/tick-count-us--microsecond-timing-granularity-...

• How to do while loop that runs and re - index reset continually

  Hello

  I'm trying to send and read data through the serial port. I'll send separate strings that are stored in a table and the serial port read a value that is returned from my instrument for each string that is sent to it. The table is indexed by the 'i' in the while loop. My problem is, the while loop runs until it reaches the maximum array index + 1, then stop. I would like to have the index restart to zero once it reaches the maximum of 'i' - value, then it returns the values of my table again. It is essentially a program to monitor for an instrument, and I need to continually update the variables in the monitor. I'm new to Labview but is really cool! If someone would be kind enough to help, I would really appreciate it.

  Thank you

  Mike

  Anil Reddy wrote:

  What about using another loop

  Nested loops...

  Please do not do this.

  A Quotient function and the rest is all you need. Entry is equal to the size of the array.

  

• Data dependence isn't the only thing to stop while loops to run simultaneously?

  I write code to turn two stepper motors with various functions. This is my first program, so I don't know it's terrible, but I'm very interested in getting this work. I checked for the data depenecy and followed some suggestions to use local variables to solve the problem. It did not work, so now I'm trying to understand this.

  I know that all features were able to simultaneously run, but after a few changes (including put everything in a while loop to keep the program running until someone clicks the exit button), no function can currently work simultaneously.

  I'll post my code in case someone has the time to watch it (I'd really appreciate it if someone did), but I am also looking for any other problem that might be the source of the problem.

  Really, any help is greatly appreciated.

  Thanks in advance

  
  

• Timer in a while loop

  Dear experts,

  I would like to stop the while loop and save the data after 5 sec. How to connect a timer to "loop condition" (red dot in while loop) so that VI will stop after 5 seconds of recording?

  Thank you.

  Kind regards

  CYTeoh

  You can not. What makes believe that you could do something like that? Use the VI of timer has elapsed to tell you how much time has elapsed. You can reset it for the next trigger.

• for and while loops

  Hello, im new to java, and now I have an assignment. I need to analyze a phone number like this-> (656) 345 6544 to 6563456544. I wrote the following code which works very well with a while loop. Now, I would like to know how can I make it work with a loop for.
  
  and the code is

  import java.io.*;
  public class Tema
  {
  
    public static String removeChar(String str, int i)
    {
      String first= str.substring(0,i);
      String last= str.substring(i+1,str.length());
      str=first+last;
      return str;
    }
    public static String cautaTrimite(String str)
    {
       /*for(int i=0; i<str.length(); i++)
      {
         if ((str.charAt(i)==' ')  ||(str.charAt(i)=='5')  ||(str.charAt(i)=='(')
            ||(str.charAt(i)==')') ||(str.charAt(i)=='-'))
            {
            str = removeChar(str,i);
            }*/
         int i=0;
          while(i<str.length())
           {
               if(( str.charAt(i)== ' ' )||( str.charAt(i)== '8' )
                       ||(str.charAt(i)==')')||(str.charAt(i)=='('))
        {
          str = removeChar(str,i);
        }   
              
        else
        {
          i++;
        }
  
           }
      
    return str;}
    public static void main (String [] args)
    {
    try{
       BufferedReader in=new BufferedReader(new InputStreamReader(System.in));
       System.out.println("Introduceti un numar de telefon oarecare: ");
       String str= in.readLine();
       
       str= cautaTrimite(str);
       System.out.println(str);
    
       }
    catch(IOException e){System.out.println("S-a produs o eroare de IO");}
    }
  }

  Published by: 1002443 on 30-Apr-2013 05:17

  In the while loop, you have full control on when you increment the i and when not, and what you're doing is correct.
  Do this with the because the loop always increments the i. To avoid this, you can discover that when you removeChar, you decrement the i, just to increment the loop right after.
  Everything in that this would mean by code more obscure all loop, so I wouldn't use it.

  Edit: Why you remove 8 in the while loop and 5 in the loop remains a great mystery.

  Published by: baftos on April 25, 2013 11:56

• a clear indicator for the while loop

  Hello guys,.

  I try a very easy application to show a number of iteration (or County by second time encoder) and show a partial and total on two indicators.

  I would like to reset the indicator and the card when I press a button 'clear', but the only clean is the card, while the indicator reset to zero quickly (with reset to the default value), but a souvenir of the iteration made up for the moment.

  What type of solution you can suggest me? ) I tried to use the registry to offset, structure of the case, but I can't find a solution

  Thanks again for your valuable help or suggest...

  Here, I posted my VI

  This is the same thing I did with your counter stuff.

• Save all the data for a while loop

  I already asked a similar question, but it is perhaps not very clear, and there are a few concepts that I did not understand.

  1. I have a keyboard to generate flow DTMF signal (I call it stream because it contains several shades that consist of a full phone number)

  2. I would like to save it as a wav file, but I guess that another format is correct and because the writing on a wav file does not support add so for this particular case, I use writing waving instead of writing to wav format

  My approach is to have a structure of queue so that I can write each iteration results in a file.

  (i) when I try to retrieve the data, there's nothing but 0.

  (II) my intention is to get 8000 samples per second (fs = 8 000) but he back up data so fast

  I have attached the file so if there is a way to solve problems, please help me.

  This vi includes many elements discussed above. There are no provisions for the intervals 'no signal '.

  Changes: Replaced with native features of LabVIEW Mathscript node. Mechanical Action to latch release button.  Cluster to array replaces Unbundle and table to build. Reshape the table to match the shape of the keyboard. Separate searches for frequencies of line and column. Note that this is easily extensible to handle the 4 x 4 keyboard. Structure of the event added. Added the stop command (but not implemented stop to the loop of the file). Added indicators for diagnostic purposes. Added FFT spectrum and graphic.

  I disabled writing to part of the file for testing.

  Lynn

• Why the execution time increases with a while loop, but not with "run continuously?

  Hi all

  I have a problem of severe weather that I don't know how to fix it because I don't know exactly where it comes from.

  I order two RF switches via a data acquisition card (NI USB-6008). One job at the same time can be selected on each switch. Basically, the VI created for this feature (by a colleague) resets all the outputs of acquisition data and active then those desired. It has three entrances, two chain simp0le controls and a cluster table, that contains the list of all the outputs and some practical information to know what is connected (specific to my application).

  I use this VI in a complex application, and I have some problems with the execution time, which increased whenever I said the VI, so I did a test VI (TimeTesting.vi) to determine where the problem came. In this special VI I record the execution time in a csv file to analyze then with excel.

  After several tries, I found that if I run this criterion VI with the while loop, execution on every cycle time increases, but if I remove the while loop and use the funtionnality "Continuous run", the execution time remains the same. In my high level application, I have while loops and events, and so the runtime increases too.

  I someone could explain to me why execution time increases and how can we avoid this? I have attached my VI test and the necessary subVIs, as well as an image of a graph that shows the execution time with a while loop and «run permanently»

  Thanks a lot for your help!

  Your SetReset_DO VI creates a channel whenever it is called.  And that you never delete a task.

  When running continuously, that it's as if it only runs once and LabVIEW has internal mechanisms to close references that will not be used again.  When a VI is used as a Subvi, LV does not know if she will be called again, and lacks these things until the first level VI stops. You have a memory leak.

  Just as you open and close your file outside the loop for, create your channel out of the loop.

  Lynn

• force stop while loop

  Hello

  I'm writing a VI that make a transaction within a while loop. I replaced the operation with a simple mathematical operation in the attached photo of the VI. For loop in the picture, I just want to add 1 every 15 secs until it reaches 10 and stops. However, I also want to be able to force the while loop to stop immediately all 15 sec until the next iteration. Is there a way out of the waiting time for the while loop? Thanks for the help!

  Altenbach says:

  Use the event with a timeount 15000ms structure and an event for the stop button. Urgent stop immediately interrupts the time-out.

  Here's what I had in mind (LV 8.5).

  

• Functions don't run when a loop running in a while loop

  Hi all

  I have a loop within a while loop. All main functions are running in this while loop. However, once the for loop executes other functions in the while loop don't work anymore until the loop for stop execution. Could someone help me with this problem? Thank you.

  Kind regards

  Nicky

  Hi Nicky,

  Ah, well I don't have much suggestions but maybe you can try with a conditional for the loop. I've attached an example. You can go through it. I don't know if it's a good idea to use this way, but again, if this can help, so I'm glad that.

  To create a condtional for loop, place a normal for loop on the block diagram, right-click and select terminal condtional.

  Kind regards

  Amine31

  (Give congratulations to good answers and Mark as a Solution If your problem is resolved)