timestamp as conditions for loops

Similar Questions

• Have different conditions for loop start and stop

  I do a VI when a circle is moving on an image control and its movement is decided by programming, but also by the user. I have programmed the speed of the circle as a vector which turns (using a rotation matrix) when a certain condition is met. This condition is dependent on the position of the circle and direction as well as other entries. The tricky thing is I want to that when the rotation condition is met (true), the rotation continues until the angle of the vector is equal to the original angle (when the condition became real) + / variable x.

  So my question is how do I program a piece of code that once activated, will run until a stop (depending on the State of vector early in the race) condition is reached. As it should be when the VI is on, I can not put a while loop inside an another while loop. Online help mentions also conditional for loops, but it isn't available in my version of LV (8.2)

  The correct solution is a state machine with a case inside a single while loop structure. Based on the need to use one of the several cases and move on to another matter as necessary using a state variable (for example, an enum) in a registry change. One of the cases should be slowed down and not do much except maybe controls survey.

  There are a lot of models.

  Do not hesitate to contact a simplified example of your code and help you.

• Bug in the conditional for loop with an array empty

  There seems to be a bug in the loop with a conditional terminal.

  If an empty array is connected to an indexed table auto entry tunnel, a tunnel of output array has an element instead of zero.

  

  The constant matrix is left empty.

  High loop without the conditional Terminal produces an empty array.

  Conditional down with a terminal loop never true generates an array containing a single element

  Thanks to LabVIEW version 8.5

  
  

• Programming of a conditional FOR the timing of the STOP button on the loops

  I have a conditional FOR loop with a STOP button, however, the nature of LabVIEW data flow, the stop button is now being questioned at some point before the end of the loop. A control not having no entry, I can't connect to the last operation of a single iteration of the loop to trigger the vote on the STOP command, and I prefer not to use a flat sequence just for the power button if I can avoid it. I've considered using a structure of the event, but I don't want to force the loop to wait that the stop button to be pressed, I want just the loop to EXIT, * IF * the stop button is pressed... but I want the stop button to be questioned at the end of the loop, so if the user presses the button stop at any time in the loop , at the end of the iteration, the loop will end... that makes sense? At present, given that the stop button is called once at some arbitrary during the iteration of the loop time, if the user presses the stop button after he is questioned, the loop must run an extra iteration, and I don't want that to happen.

  ... in any case, I guess I'm looking for a more elegant way to implement that having to use a flat sequence just for the stop button.

  Sorry, but you'll have to use a sequence structure.  This is why they are there.  Sometimes they have their purposes.  Here is how I would handle it.

  

• For loop within a while loop

  I have for loop within a while loop... admission to the for loop N comes from the VI selection... the while loop I a condition essentially statement it stops just after to finish all the iteration in loop...

  Entrance to the N loop is bascially driven by a local variable... that's the problem Iam having:

  When I press the Start button to run the program... regardless of the output of the select VI is gives the N of the for loop, then the loop starts and then ends in place... and when the output of the select statement takes a different value (the N of the loop for) loop not work until I restart the program again... What can I do so that the for loop runs again for another value of N, the RUN program button is enabled.

  1. clean your diagram.  Style guides suggest keep the pattern of a single screen.  With a little effort, I was able to get your DB less than 1600 x 1000 pixels.

  2 then I can see (some) it happens all at once. This thing does nothing?

  3. local variables can lead to race conditions.  Output in Angle position may be a race condition, although is probably not what you wanted to do.  What does the wired local time at the moment present terminal meter? (Ooops! Two controls with the same name - which can be quite confusing as well!)  If you need or want two components of façade having the same text, use the legends.  Make the labels is different so the comic is more readable.

  4. having more than one Dequeue function on the same queue will lead to unpredictable results.  When an item is removed, it is removed from the queue and is not accessible to any other Dequeue function.  In parallel loops, you have no way of guessing which Dequeue will seize any particular element.

  5 use Boolean reverse instead of Select with wired False to true and true cable at the entrance to false entry. Better, just make the case of forgery in the structure of the case within the for loop the real deal. No required reversal.

  6. I was not looking for to determine the logic of the code within the structure of this case. It seems I could have posted a much simpler way to do this several weeks ago.

  7. use multiply from the Digital Palette rather than a node form multiply by 4 or 1.8. Uses less space BD and is much easier to read.

  8. as has been suggested, learn how to work the machine architecture and the State of producer/consumer.  They can make your life much easier.  Do not try to convert immediately to these models.   It's too much bite to at some point.  Learn how they work first.  Make a few simple examples.  Then rewrite this program in this format.  Probably faster than fixing what you have now.

  Lynn

• FOR loop does not update the local Variable

  I am newer to labview, and I can't wrap the head around why not a habit of local variable to update in the code if it updates on the dashboard. Anything im missing?

  Assume that you are talking about the local variable of the 'State of the cell. The terminal updates every 500ms in the small top loop, the local variable indicates simply that the indicator and thus updates also.

  The problem is "dataflow" and you need to familiarize yourself with the concept!

  Once the while loop starts, the local variable is reading and inside the loop begins. Most likely, the local variable is read before it is updated in the small loop, so most likely returns the value of a fade on the first iteration of the while loop. Now the small loop continues to go twice per second for about five seconds. Only after the loop FOR (and everything else inside the while loop) completed, the while loop will go to the next iteration, date on which the local variable is read once more, this time with the last value of the last for loop iteration of the previous iteration of the while loop.

  In summary, the local variable updates very well, it's just that the code does not read the new value around most of the time.

  Your VI is full also potential competition conditions caused by the over-use of the local variable. You need to respect the proper execution order by eliminating local variables.

  So what is the solution? Hard to say without knowing what the VI is supposed to do. Most likely, you will need to remove the inside OF the loop and use it outside while loop for everything.

• How to end Vi in a For loop

  Hello. I enclose my Vi. I have a question about stopping a loop For I have 2 loops for the case "Test underway". I have a termial conditional that will stop my Vi but only after you have completed all the iterations of the loop For I have need of this Vi to stop immediately, when you press the stop button. I realize that it will take probably still finish an iteration, however, at the present time it waits until all iterations are performed, before coming to rest. I'm doing it with the same front button that stops the while loop. I tried a local variable, but to change a mechanical action and I prefer not to do, if this is possible. There was a lot of posts related to this topic here on the forum but I couldn't find the one suited to my needs. Thank you for your time.

  Your While loop waiting loops to stop, so you can use local variables of your stop button to stop the for loops right now.

  See you soon,.

  Jimmy

  

• Creating tables in a nested for loop

  Hi all.

  I was stuck in this problem for quite a while now and I still don't know how to continue. Some outside the entrance would be greatly appreciated!

  I'm doing the following:

  -Take an array of numbers, to check if they are within a certain range (e.g. between 2 and 4)

  -Build two new arrays: one with all the numbers that are inside the beach and the other with the rest.

  An additional condition is that the amount and value of the range conditions will change (for example, it could be between 2 and 4 only / 2, 4 AND 6 and 7 according to the entry)

  To treat this, I created two nested for loops - one that goes on a table that contains conditions of the beach and inside that actually go and check if the values are in the range. I think I did that part successfully, but the next part is confusing to me - how to actually create the tables separated within two loops for?

  My apologies if I did not explain it well. Another method to support this problem is I want to translate following LabVIEW:

  Ranges of table / / [1 5 7 10] exodus-> This means we want to divide numbers based on those who are in (1,2) and (4.5) against those who are not

  Table of values / / [2 3 6 11 3]

  EndOperationDelegate table / / array of values within the range
  Table outValues / / Array of values out of range

  for m = 1:size (ranges)

  for n = 1:size (values)
  If (THE NUMBER IS on the INSIDE of EACH RANGE)
  EndOperationDelegate = [EndOperationDelegate NEWNUMBER]
  on the other
  outValues = [outValues NEWNUMBER]
  end

  end
  end

  Sounds easy enough, but it gets so chaotic with Labview that I don't know what to do. I have attached a reference image - insertion in the array function is not in fact add to the table, it creates a new table. How can I save that for when the nested for the ends of the loop?

  I have seen a few examples with shift registers which lie in a loop and I couldn't successfully that transfers in my block diagram.

  Any help/direction would be greatly appreciated.

  Hello!

  See the following example to understand how you can create a table in the loop For

  

  In your case, you also can uce conditional terminal to create a table only when then located nearby. It makes the code much cleaner that the structures of the case

  Hope this helps, if not, let me know if I can help you!

  Marcin

• Check if for loop finished

  My question is how to check if the for loop complete? I'm controlling a supply of Genesys Lambda and taking a linearity data. I need to check if the loop is completed, ask the user to reverse polarity and resume data. Got only the first part of work. Looks like I can't just check the loop for the last iteration.

  I have attached my code for anyone to check if possible.

  Thanks for your help.

  Peter

  Altenbach wrote: you could put another loop with a FOR 2 wired to N around the code, display the conditional terminal and exit the loop prematurely, according to the results of the dialog box.

  Here's a quick project, modify as necessary. (There are a few tips, for example, you must enable messages only on iteration 0. Easy to fix. )

  

  (I have DAQ or even understand your material, so I can't test, but things don't seem quite right across.

• Aliases for columns in explicit for LOOP sliders

  Hi friends

  In the below block (forloop) I don't get countsal values, but when I run the query, it gives the County. By this (COUNTSAL) the below if condition fails .i don't know why it is failing.

  But when I use it with a simple loop gives a correct result.

  FOR LOOP:

  SCR CL;

  SET SERVEROUTPUT ON;

  DECLARE

  CURSOR C1 IS EMPNO, ENAME, COUNT (SAL) SELECT COUNTSAL OF THE GROUP EMP BY EMPNO, ENAME;

  SHEIKYERBOUTI C1% ROWTYPE;

  BEGIN

  TO IND IN C1

  WHEN the OUTPUT C1% NOTFOUND;

  DBMS_OUTPUT. PUT_LINE (IND. EMPNO);

  DBMS_OUTPUT. PUT_LINE('SALCOUNT:'||) SHEIKYERBOUTI. COUNTSAL);

  IF SHEIKYERBOUTI. COUNTSAL > 0 THEN

  DBMS_OUTPUT. PUT_LINE ('NAME' |) SHEIKYERBOUTI. ENAME);

  END IF;

  END LOOP;

  END;

  simple loop; (get a correct output)

  SCR CL;

  SET SERVEROUTPUT ON;

  DECLARE

  CURSOR C1

  IS

  SELECT EMPNO, ENAME, COUNT (SAL) COUNTSAL OF THE GROUP EMP BY EMPNO, ENAME;

  SHEIKYERBOUTI C1% ROWTYPE;

  BEGIN

  OPEN C1;

  LOOP

  FETCH C1 INTO SHEIKYERBOUTI.

  WHEN EXIT C1% NOTFOUND;

  IF SHEIKYERBOUTI. COUNTSAL > 0 THEN

  DBMS_OUTPUT. PUT_LINE('NAMES:'||) SHEIKYERBOUTI. ENAME);

  END IF;

  END LOOP;

  END;

  Please suggest me.

  Your code is the missilg LOOP keyword. Also, loop for CURSOR automatically closes after extraction of all lines - no OUTPUT WHEN you have to. But the key is to loop to extract CURSOR loop lines said variable registration - a following KEYWORD, IND in your case:

  DECLARE

  CURSOR C1 IS EMPNO, ENAME, COUNT (SAL) SELECT COUNTSAL OF THE GROUP EMP BY EMPNO, ENAME;

  BEGIN

  TO IND IN C1 LOOP

  DBMS_OUTPUT. PUT_LINE (IND. EMPNO);

  DBMS_OUTPUT. PUT_LINE('SALCOUNT:'||) UNRELIABLE COUNTSAL);

  IF COUNTSAL > 0 THEN.

  DBMS_OUTPUT. PUT_LINE ('NAME' |) UNRELIABLE ENAME);

  END IF;

  END LOOP;

  END;

  /

  7521
  SALCOUNT: 1
  NAMESWARD
  7566
  SALCOUNT: 1
  NAMESJONES
  7844
  SALCOUNT: 1
  NAMESTURNER
  7876
  SALCOUNT: 1
  NAMESADAMS
  7499
  SALCOUNT: 1
  NAMESALLEN
  7369
  SALCOUNT: 1
  NAMESSMITH
  7782
  SALCOUNT: 1
  NAMESCLARK
  7839
  SALCOUNT: 1
  NAMESKING
  7698
  SALCOUNT: 1
  NAMESBLAKE
  7900
  SALCOUNT: 1
  NAMESJAMES
  7902
  SALCOUNT: 1
  NAMESFORD
  7788
  SALCOUNT: 1
  NAMESSCOTT
  7654
  SALCOUNT: 1
  NAMESMARTIN
  7934
  SALCOUNT: 1
  NAMESMILLER

  PL/SQL procedure successfully completed.

  SQL >

  SY.

• AS2: Paintings and 'for' loops

  Hello

  I have a simple table of clips ("box1" - "box6") that I created on the stage. I then a simple onRollOver function is iterated for each of these clips, as shown below. Only now is it works well, but I can foresee two problems potential for when I use large Bay and apply this technique to my real job files.

  1. If I have a lot more video clips, the first line of code would be much longer that it lists each movie clip instance name. Is it possible to use, for example, a for loop to include these clips in the table without having to type their names? As you can see here, I used a simple incrementing numerically naming process. I think that the problem may be that I use video clips with the name of bodies assigned on the scene and not created through ActionScript.
  2. The function I created it makes all the gotoAndStop (1) movie clips and one who was knocked down then goes to frame 2. Is there a way to make all the movie clips in the table with the exception of the one who drove over gotoAndStop (1), IE. is it possible to exclude the music carried over from the first part of the function? Here, it works fine as it is, but I think that maybe when I start using the more complex functions with interpolations etc it can cause problems. Or not?

  var boxArray:Array is [box1, box2, box3, Box 4, box5, box6];.
  var: string of area;

  for {(boxArray box)
  
  boxArray [box] .stop ();
  
  boxArray [box] .onRollOver = function() {}
  for {(boxArray box)
  boxArray [box] .gotoAndStop (1);
  }
  this.gotoAndStop (2);
  }
  }

  For the first question, if you know how many boxes are there altogether, you can use a loop for to add in the table...

  for (i = 0; i

  boxArray.push (this ["box" + String (i + 1)]);

  }

  There are ways to do this without knowing how many there are as well.

  For the second question, you can probably use a conditional to compare if 'this' is equal to boxArray [box] or not and whether to exclude it.

  boxArray [box] .onRollOver = function() {}
  for {(boxArray box)

  {If (this! = {boxArray [box])}
  boxArray [box] .gotoAndStop (1);

  } else {}

  this.gotoAndStop (2);

  }
  }
  }

• For loop - utl_file.put_line

  I have this loop which I want to put the conditions as follows:
  

    for rec in C3(i.customer_id,i.co_id) = 'DP' and = 'CO') --conditions here
    loop
      utl_file.put_line( l_file,'Status is '||c3_rec.ohstatus|| ' ' ||i.co_id);  
      
      end loop;
     --   DBMS_OUTPUT.PUT_LINE('Status is '||c3_rec.ohstatus|| ' ' ||i.co_id);  
       END IF;
       
         utl_file.fclose( l_file );

  How am I suppose to do?
  
  Published by: JoannaLee on August 27, 2008 19:47

  You don't want to open and close the file within the loop. It is extremely inefficient, the more it will overwrite data in the file each time that perform you an iteration in the loop (you can open the file in Add mode, rather than write mode, to solve the problem of the crash, but you would still have the performance issue).

  You want that the code looks like

  -- Open file
  l_file := utl_file.fopen( ... );
  
  -- Loop over your cursor
  FOR c3_rec IN C3(i.customer_id,i.co_id)
  LOOP
    -- Write a row to the file
    utl_file.put_line( ... );
  END LOOP;
  
  -- Close the file
  utl_file.fclose( ... );
  

  For simplicity, I am omitting exception handling logic, but I hope you see the general approach.

  Justin

• parallel processing: for loop taking place

  Hallo,

  I have a loop 'for' runnin on this system: LabVIEW2009, windows7, intel i7.

  I wonder if and how I can tell to LabVIEW that he would be allowed to run different iterations of the loop at the same time (concurrently) on my processor with 8 cores.

  Now, it will execute the next iteration when it ended the previous, even one so is there no dependencies in iterations.

  I want to give a 'ownership' of the loop, which means that it can be "unfolded" for parallel execution.

  Thank you

  Pier

  pop up on for loop and select "configure interation Prallelism."

  Activate it.

  Wire a certain number to the new 'P' of entry to specify how many processors to spread it everywhere.

  Ben

• for loop in formula node does not

  Hello

  I; m trying to use for loop in the node of the formula, but it is does not work. I want the output (y1) product value in certain range (a and d, and of course one is smaller than d). I ' do not use primitive labview since a and d are keep changing (both are variable). I tried to put "return 0;" after the y1 equation but the error popup.

  The issue of the loop works not because it gives the last value (I average would be ""). It does not begin with an (initial) value.

  Please help me how to solve this problem...

  Pls ignore other variables not used in the equation. Thank you!! A lot

  Your code works.

  

  But why you use loop?
  You get the last value, so you can get it in a single step with x correct;

  Also why you say that can not use primitives?
  If you use wire instead of terminals or local variable States values constant.

  Y1, y1_2, y1 3 is the same values calculated differently.

  

• parallel for loops does not

  Hello.

  I'm learning the multi - thread programming. To start, I use "parallel for loops" and I was surprised that it does not work. One - thread loop work a few times faster (depending on settings) that multi - thread. I don't know why, and it is my request to correct my Vi to work properly.

  Lenovo, G580, Windows 7, 64-bit computer

  Intel Core i7 3632QM
  Ivy Bridge
  Specification Intel (r) Core i7-3632QM CPU @ 2.20 GHz
  Package (platform ID) Socket 988 B rPGA (0x4)
  Number of hearts 4
  Number of threads 8

  LabView 2011.

  Altenbach says:
  

  Gibbon wrote:

  What was 'strange' behavior?  In "linia dluga" when inside the loop is on '1' of the "spreed up' between one and multi-fil is about 3 times, when I put it in '20' this grow to 6.2. It was strange form me, becourse I expect a similar value.

  A parallel FOR loop has an overhead for parallelization (split the problem, then go back the results, etc.). If the code is very fast, the overhead is proportionally larger. If the Subvi takes a long time to complete, the overhead of parallelization is insignificant. It is often not worthwhile to parallelize the loops with a very simple and fast code.

  Gibbon wrote:

  Altenbach - I have another question if you can help me - how did you "seconds relative high resolution." VI "? -I want to say how did you know that there is this 'vi '. And thanks a lot for your modyfications.

  You can find it in vi.lib\utilities. It is well known.

  Maybe not well known enough!  the 'Hidden gems' package adds to your palattes.  It has also been considered by a nugget of the community