Parallel for loop 2D table

Similar Questions

• 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

• Préallouée VI environment in paralleled for loop

  Hello

  I searched a bit and couldn't find that everything about this specific issue.

  If I have a Subvi in a parallelized for loop and the Subvi is set upon reentrant preallouee clone, the Subvi register also several characteristics of memory depending on the number of loop iteration For? My specific application is a Subvi containingvibration Analytisis screw using the previous data in their spread and filters.

  Thank you!

  
  

• LabVIEW parallel for loop and OpenMP

  Hello:

  It's just a curious post, I just learned about OpenMP and I found that OpenMP helps you to parallelize loops in c about the same way that you can use the loop For parallel in LabVIEW.

  The loop For Parallel LabVIEW is being implemented under the hood using OpenMP? Or is it just a coincidence?

  No, it is not implemented LabVIEW parallel for loop under the hood using OpenMP. You might be interested to read this article on modern developments in the LabVIEW compiler architecture. Specifically, in this case, it's the DFIR technology discussed here that facilitates parallel for loop transformations.

• How to create parallel tasks using parallel for loops

  Hello

  I'm going to put in place a program that communicates with the six logical controllers and must read the status of the system every 100 Ms. we use OPC datasockets for this, and they appear a bit slow.

  I created a uniform method of comm. for all controllers, and now I find myself this method of programming six times to communicate with each system. I was wondering if it could be done more elegant using the parallel for loop, in which case I program an Exchange once and then six workers running simultaneously. Since a picture is clearer than a thousand words, what I'm asking is:

  Is it possible to replace something like

  

  by

  

  and that for performing these tasks in parallel loop (on different cores / in different threads)?

  I have configured the loop to create instances of the 8 to the compilation, so I would 2 surplus available when running instances if I find that I need an additional system.

  The benefits of the Show method in the second photo for me are:

  * takes less space

  * changes need be made only once

  * less blocks, son and other things makes it clearer what is happening.

  * flexibility of the actual number of tasks running (8 available runtime instances)

  * If multiple tasks are necessary, I need only update the maximum number of instances and recompile, i.e. no cutting and pasting necessary.

  Unfortunately, I don't have these available system yet, so there is no way to test this. Yet, I would like to know if the above works as I hope - unfortunately the help of labview is not quite clear to me on that.

  Best regards

  Frans

  Frans, the parallel for loop will work as expected in this situation. The six tasks will run simultaneously in different threads. What part of the aid could be made clearer?

• Waiting for timeouts in parallel for loop

  Hello

  I am currently working on a project where I communicate with a number of devices over TCP. This happens at the same time, which is not a problem as long as does not change the number of devices. Now, I want to open my project to support the case with different numbers of hardware devices, which I want to make a loop (read the device of DB information in an array and iterate over all items).

  I read on a single loop parallel execution for, but it seems that the logical cores is a limiting factor for the number of alternative treatments. Unfortunately, I must also take into account delays in communication which translates as the waiting time for each iteration of the loop.

  As you can see I have this creates a lot of idle time that adds up quickly (running with 10 carrots 4 logic devices takes three times the delay to finish without the loop it would not delay time as all connections are pending at the same time.

  I hope someone can direct me to a solution.

  Thank you

  Move the reference VI opened in the first LOOP.

  You use the same reference for all instances.  So wait for asynchronous call will just see one of them finished and the results.  By placing the reference VI open inside your loop, you will have a different reference for each call of your VI.

• 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 creates 1 d data table

  Hello, I am building the circuit below, and I'm running into a lot of problems with the loop, creating a table 1 d of data from certain types of data such as the ERROR OUT and the VISA NAME of RESOURCE. I understand why it does this, but I only need the last value in the table (the value of the last iteration of the loop for). This is true for me for the error, resource name of visa, and I was thinking of using the Boolean value that indicates when the for loop.

  Is there a simple way to extract the last value in the table 1-D so that it is correct to pass along trails, VISA and ERROR type?

  You actually create a block diagram, not a circuit.  A circuit is an electrical system including devices and wires.

  If you right-click on the tunnel and choose disable indexing, then you get the value of the last iteration rather than a 1 d table.

  I recommend you watch the LabVIEW tutorials online
  LabVIEW Introduction course - 3 hours
  LabVIEW Introduction course - 6 hours

• 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

• 3D table organization fomr a 1 d array in a for loop

  Hello-

  I am currently using a program OR opening multiple files (http://zone.ni.com/devzone/cda/epd/p/id/818). As a side note, I noticed that the files are automatically organized by name once records are returned from the Subvi. Will be called BxCy where x is a number and y is a number to two digits (e.g., B2C34) and within each file, I load a 1 d table which I extracted the files, I am loading.

  I want to do is organize the output so it has the structure of

  Page C1

  Line B1 [(table 1 d)]

  Line B2 [(table 1 d)]

  ...

  Line Bn [(table 1 d)]

  Page C2

  Line B1 [(table 1 d)]

  Line B2 [(table 1 d)]

  ...

  Line Bn [(table 1 d)]

  and so on.

  My first question is that I'm not 100% sure that the file names will be organised by name in the lu multi-fichier VI so is there someone who can check it out? Second, even with what I would like to know if there are effective methods to achieve this. Should I just use two tables index to classify based on their number of anc C B? This seems to slow down and I saw on other positions the function array reshape could speed up the process but I'm not sure how to proceed. I don't have access to the structures of inplace (I don't know if I just forgot to install this module, or if it was not included in my subscription LabVIEW).

  The program that I joined is in LabVIEW 2009 SP1 and I'm on a Windows 7 64-bit machine.

  Thank you in advance!

  J

  • You did not include the subVIs. Please do.
  • Never convert a path to a string, unless you do something specific OS. Use 'strip path' work on the name of the file as strings, then convert back to a path using "build path" if necessary.
  • To create a 3D tables 1 d array, you need two stacked FOR loops. Pages in the loop external and rows in the inner loop and outoindex in the output in loop tunnels. You will automatically get a 3D Board.
  • It might be much easier to use the "list of files" with a motif of "B * C *" for example. Is the number of the page always 1 and the numbers of two line numbers (padded with a zero not significant as appropriate)? In this case the sorting will be correct.

• loop for doesn't loop in table built from worksheet

  I'm probably doing sonthing but really stupid...

  first I build and table of data in a worksheet (RefLookup)

  the spreadsheet contains 3 rows above the row is my label (getting by)

  the second row it my face value

  the third row is my minimum value.

  REF is my live stream of data to be searched.

  then, I put this in a loop for loop through the table until she finds that go the Ref data in the lie...

  Then I just stop the loop and the index of output value.

  This index value is the opportunity to review worksheet data and return the label for this index.

  from what I can understand the code should... work. but it does not go past the first itteration of the loop for

  any ideas?

  Please and thank you

  John

  You must set the comma separator, otherwise you get all the data. (read spreadsheet)

  You do this too complicated. Here is the equivalent code. I don't know that it can be much more simplified!

  You don't need the outside while loop. find once is enough.

  

  You probably want to add a "select" after the loop that selects NaN instead of the last value if nothing is found, based on the Boolean value.

• Oracle Business Rule - Table of decision for loop

  Hi Experts,

  I have the scenario where I get the list of values, and I don't have to iterate over the values in the decision table. I can't use the normal return If so , in reason of the restriction of customer "only use table decision." Can someone guide me how to use the for loop in the decision table?

  Thank you

  We can check multiple values of the same element in the decision table. so no need to make a loop.

• How to set a variable in a table to grid 'for' loop

  I'm afraid I'm stuck again!

  The next step in the animation I'm working on, is to set up a Boolean value, 'pierced = false', so that all instances of the attachMovie ("openCircle") have a Boolean "drilled = false' associated with them." Then when someone clicks on one of the instances of the attachMovie ("openCircle"), the Boolean value becomes "pierced = true', but only for that instance was clicked."

  What I've done is to set the (Boolean) variable (highlighted in bold below) in the two 'for' loops through the table in the grid, but it returns an undefined value. Do I need to configure a separate table? (see code below):-

  set up the grid for solid table

  spacing: var number = 5.75;

  Var CDL: number = 20; the number of columns in the grid

  var rows: number = 20; number of grid lines

  var leftMargin:Number = 154;

  var topMargin:Number = 169;

  depth: var number = 100; starting point for the depth

  var drilled: Boolean;

  for (i = 1; I < = lines; i ++) {}

  for (j = 1; j < = cols; j ++) {}

  drilled [rows, cols] = false;

  trace (drilled);

  current = attachMovie ("openCircle_mc", "openCircle_mc" + i + "_" + j, depth ++);

  Current._x = leftMargin + ((i-1) * (spacing + current._width));

  Current._y = topMargin + ((j-1) * (spacing + current._height));

  Current.Row = i;

  Current.Col = j;

  Current.Oil = Math.floor (Math.random () * 1.1);  about 1/10 objects have oil = 1, 9/10 oil = 0

  Open the circle initially invisible, visible on rollover

  Current._alpha = 0;

  {current.onRelease = function ()}

  trace (this.row + "" + this.col);

  current.drilled = true;

  }

  current.onRollOver = function() {}

  This ._alpha = 100;

  }

  current.onRollOut = function() {}

  This ._alpha = 0;

  }

  }

  }

  I would be grateful for any help. Thank you.

  Then, create a two dimension table named drilled so that it exists when you try to fill...

  var drilled: Array = new Array (new Array();

  There might be a problem that you're missing setting the values of the [0, #] components of the table - paintings begin with an index of 0.

• Search in table 1 d for a specific table

  Hello

  I have a 1 D table list consists of series of 1 and 0. Consider the size of this data table is 1000

  Now I would like to find in this table for a specific as model 00110101 or random sequence. While there could be more than 1 match in the table 1 d

  and I would like to get the index of the first element for all matches.

  Would you please help me with this code. First of all how can I search for an item in table not only a (search1D array.vi no) and also how do I get the index for this game

  Thank you very much

  I have a table of data consist

  Brute force

  For loop (no automatic indexing)

  On the inside of the loop get subset of table a clue to a length of time set all search pattern.

  Table pattern equal subset? If true for loop iteration is the index of the mapping table.

  Repeat until the end of the table - length pattern + 1 times.

  Try it and your zip code.

• For loop runs with the value of N unwired

  In this case will be a loop run connected to the loop N worthless? I have seen a few examples of the loop for run without a certain number of times set to be ran wired or for example a size of table or something like that.

  PauldePaor wrote:

  Here's a program I am and as you can see the image that the program runs without the loop N being wired. The program will run without problem

  As everyone else has said, you don't have to plug something on N.  If you wire up a table for loop for input "auto-index", the loop for will run automatically the smaller table size.

  Perhaps an example will help:

  

  This makes a loop on my table size (in this case, long of 5 elements).  On the edge of the loop for which resembles [] brackets, indicates that it is auto-indexé.  The loop should go through each item one at a time (1, then 2, then 3, then 4, then 5).