Question of iteration

Similar Questions

• Question of the ADF

  Let's say I VO: aVo, bVO, cVO, dVO
  
  aVO viewLinked viewLinked bVO to CVOs and also bVO viewLinked dVO
  
  The links are two-way.
  
  All belong to the same puzzleAM.
  Model data AM defines a02VO and aVO two instances a01VO.
  
  A01VO defined as a01 VL b01 VL (c01VO, d01VO)
  a02VO instance does not define the views of VL
  Also define VLed B02VO to C02VO and D02VO
  
  Isolaltion set as new transaction
  
  Issues related to the:
  If used in the query A01Iterator
  (a) will lead to the updating of all A01Iterator
  (b) update A01 and A02
  (3) Will Refresh A01, B01,
  (4) update A01, B01, C01, D01
  (5) will refresh all iterators
  (6) only A01
  
  If used in the query are refreshed to the A02Iterator...

  An iterator is bound to an instance of VO, so ask an iterator updates the bound instance of the VO. Your children are updated when you use an accessor to get the data of a child.
  That said (and I hope I understand correctly), questioning a01 iterator must perform only aVO and evaluators, you use the your children.

  Better that you write small test app and try it out.

  Timo

• Question in cooperation with af:iterator and by program (add and delete records using the list)

  In our application, we try to add and delete records within a one: iterator lie to the backing bean list table.

  According to the feature remove should not fire any validation form so we are settign Remove button including the immediate property. And add can throw validation before adding a new record.

  Here the problem comes with button Delete with activated immeidate.  The deletions list action recording is removed from the collection list at the beacking bean, but after that the interface iterator partial page refresh user displays with bad Recordset. Some how instead of getting the last recordings of server of the user interface displays the previous local values for input components.

  For example: if I have 5 files in the list and delete record 2nd of collection. Backing bean (server side) the 2nd record is perfectly removal of list collection.

  On the user interface, the iterator 4 records are displayed as the size of the list is 4, but instead of 2nd record the last record is not rendered. According to my understanding, as deleting comme la suppression touche key is set immediately then the some how these recordings (genereted the Id of component runtime inside the i1: 0:it1 etc...) Apply request vandekerckhove is not updated gettign, Hene showing the old local values inplace of these components of entry and this behavior is only for input components.

  Can you suggest me a solution more come to the question above. Delete with immediate should unregister correspondent and only the record deleted if pannals UI.

  JSFF code

  <af:panelGroupLayout id="pgl1" binding="#{viewScope.formBB.mainPGL}">
          <af:iterator id="i1" value="#{viewScope.formBB.allEmployees}"
                       var="emp" rows="0" varStatus="vs"
                       binding="#{viewScope.formBB.iteratorBinding}">
            <af:panelFormLayout id="pfl1" maxColumns="4" rows="1" labelAlignment="top">
              <!--<af:outputText value="#{vs.index}" id="ot1"/>-->
              <af:inputText label="First Name" id="it1" value="#{emp.firstName}"
                            autoSubmit="true" required="true"/>
              <af:inputText label="Last Name" id="inputText1"
                            value="#{emp.lastName}" autoSubmit="true"
                            required="true"/>
              <af:commandImageLink text="Delete" id="cil1"
                                   immediate="true"
                                   actionListener="#{viewScope.formBB.deleteEmployee}">
                <f:attribute name="index" value="#{vs.index}"/>
              </af:commandImageLink>
            </af:panelFormLayout>
          </af:iterator>
          <af:commandButton text="Add New Employee" id="cb1"
                            actionListener="#{viewScope.formBB.addNewEmployee}"/>
          <af:spacer width="10" height="10" id="s1"/>
  </af:panelGroupLayout>
  

  Delete the Action listener for the bean

  private List <Employee> allEmployees;
  public List getAllEmployees() {
          return allEmployees;
      }
      
  public void deleteEmployee(ActionEvent actionEvent) {
          int index = (Integer) actionEvent.getComponent().getAttributes().get("index");
          if(allEmployees != null && allEmployees.get(index) != null) {
              System.out.println("Emploeye Name:" + allEmployees.get(index).getFirstName());
              allEmployees.remove(index);
          }
          //AdfFacesContext.getCurrentInstance().addPartialTarget(mainPGL);
          AdfFacesContext.getCurrentInstance().addPartialTarget(iteratorBinding);
              
      }
  public void addNewEmployee(ActionEvent actionEvent) {       
          Employee addE = new Employee();
          if(allEmployees != null) {
              allEmployees.add(addE);
          }
          else {
              allEmployees = new ArrayList <Employee>();
              allEmployees.add(addE);
          }
          AdfFacesContext.getCurrentInstance().addPartialTarget(mainPGL);     
      }
  

  Jdev version - Build JDEVADF_11.1.1.7.0_GENERIC_130226.1400.6493

  POC Application - https://drive.google.com/file/d/0BysBrGAsXoo0Qjh3VGkzZkRGck0/view?usp=downalod

  Help, please.

  You probably need to reset submitted values.

  For this, you can use this util class: ResetUtils (reference Java APIs for Oracle ADF Faces)

  For example: ResetUtils.reset (iteratorBinding);

  BTW, you should never bind components to bean managed with a scope greater than the scope of the request.

  Dario

• General question about the iterations

  Hi guys,.

  I have trouble understanding others code.

  Can someone tell me the 200 iterations I marked (yellow) in the file, hence this number

  I think that it somehow the number of 4 and 50 left but I don't know

  Thank you

  Wow, copy the following code shows some very bad practices.

  It's not really 200 it's 50. And it is based on the set temperature, current temperature and certain value resulting in a shift register. Oh, under the label "Curve of temperature Monitoring", there is an increase which is compared to 50. Set a conditional breakpoint at the break at 49, turn on highlighting and try to read the tea leaves.

• Question about lesson 1-7, slide 2: Iterable.forEach () and parallel execution

  As stated in the previous parts of this lesson, the library can choose to run lambda expressions in parallel.

  In the example: the final execution using Iterable.forEach () result will be same as using a traditional loop?

  Using a traditional loop that you are sure that the items in the list are printed in the order they are in the list.

  This is not always true using Iterable.forEach (), since the items could be printed by different threads?

  "... the library can choose to perform lambda expressions in parallel."

  I wanted to clarify a little.

  The general rule is that parallel execution can occur if the particular library used API allows him, and it is usually under the control of the programmer. For example, lambdas in parallel flow (which will be addressed later in the MOOC) can be run in parallel, but the programmer must explicitly request parallelism. If the API says nothing about parallel (or asynchronous) execution, then those that don't occur.

  If Iterable.forEach runs sequentially, and the underlying class specified an order, the execution will take place in this order.

• ADF Table: LOV iterator question

  I have a modifiable ADF table, with a column that contains a LOV (select only one). This LOV gets its data from another object from view. We have a LOV maintenance screen that fills view object of the LOV with data.

  My problem is when you insert new data into the view of the LOV object, then go to the ADF editable Table that contains the column LOV LOV new data does not appear in the choice of a Select. However, if I open a new browser window and open the app, I see new data LOV. New data of LOV shows also in the database. It's telling me that iterator of the LOV does not update correctly.

  However, since I have a Table of the ADF, the LOV and all other columns are concentrated in a tree of liaison and, respectively, iterator of the Table of the ADF (in links to the page). So I don't know how I can directly access iterator of the LOV and refresh it.

  How to refresh the iterator LOV?

  We're currently on ADF 11.1.1.3.

  Another Edit:

  Well, I have this workaround works properly... It was a combination of settings that need to happen. I'm not crazy about it because it seems ineffective - but it works.

  (1.) I have exposed the view line class my ADF Table Imp edit object from view (and accessors included). Accessors included so I had programmatic access to view my LOV accessors. I had two Accesors for I can have a LOV switching on my LOV attribute.

  2.) then in class RowImpl, I went on the Get Accessor LOV accessor methods, I've done below, then refresh us the view accessor.

  /**

  * Gets the view accessor RowSet ActiveSmsModules.

  */

  public getActiveSmsModules() {} lines

  All lines rs = (RowSet) getAttributeInternal (ACTIVESMSMODULES);

  rs.executeQuery ();

  return of rs;

  return (RowSet) getAttributeInternal (ACTIVESMSMODULES);

  }

  /**

  * Gets the view accessor RowSet AllSmsModules.

  */

  public getAllSmsModules() {} lines

  All lines rs = (RowSet) getAttributeInternal (ALLSMSMODULES);

  rs.executeQuery ();

  return of rs;

  return (RowSet) getAttributeInternal (ALLSMSMODULES);

  }

  3.): after that, I go to the iterator of my Table ADF Edit (in bonds), the Always value. I don't know why, but it did not work without this parameter.

  4.) then in my ADF Page Backing Bean, who holds the editable ADF table, I had to run this code once when rendering the Table of the ADF gets. Basically, re - run query to the ADF Edit Table iterator. Then refresh the interface component user LOV. The LOV object was bound with a get and set accessor in my grain of support.

  BindingContainer links = getBindings();

  Iterator DCIteratorBinding = (DCIteratorBinding) bindings.get ("UnvPracSmtView1Iterator");

  iterator.executeQuery ();

  AdfFacesContext.getCurrentInstance () .addPartialTarget (getSmtSmsCode ());

  It would be easier to be able to access just iterator of the LOV through tree of the ADF Table bindings, but it doesn't seem to be a simple way to do this. If someone has another solution to this, please let me know!

• More questions about custom asynchronous device

  I am trying to create a custom asynchronous device for VeriStand and have the following questions:

  (a) at what rate entered in the course of analysis and data channel pushed into the FIFO of the custom device entry? The scanning speed depends on if the input channel is mapped to a control of workspace object or if it is mapped to an output of the simulation model (.dll file)?

  (b) at what rate the VI real-time asynchronous custome device running? Is it at the same rate as the primary control loop rate? Can I change the rate of implementation of a custom device and how?

  (c) I have a quad-core PXI time real platform. How can I connect the device customized to a specific processor, like what you do with a simulation model (.dll file) in the definition of system file?

  Thank you in advance.

  Data FIFO

  The rate at which data are pumped on your meter is static and has nothing to do with the question of whether the workspace is connected, or if a model is mapped to one of your channels. By default, data are pushed in input of your Custom FIFO each iteration of the loop of primary control. If the FIFO is full, the oldest data packet is crushed. In addition, by default, outings THAT FIFO is controlled ever iteration of the loop of primary control. You can, however, use the NI VeriStand - Set custom decimation of device to mark a property on your customized device that will tell the system its decimation expected in the. If you set a decimation of 10, for example, the primary control loop will be send every 10 iterations of new data and check for new data out FIFO only every 10 iterations. This can help reduce the load of the processor in your system if you do not need updates that often.

  Similarly, you can use the NI VeriStand - Set of deep FIFO to control the depths of the FIFO of your entries and exits FIFO respectively. By default, both have depth 1.

  Delivery rate

  The rate at which your custom device runs depends on how set you up. You can for example, having your Custom asynchronous device uses its own schedule and run at a pace totally independent of the system. Your VI could have regular while loop with a 10ms timer, for example, or it could be based off some hardware device timing.

  Alternatively, you can choose yourself closely synchronize with the primary control loop. This by registering using a property that your Custom device has a timed loop that will use the clock of the device. The unit's clock is a source of synchronization that is checked each iteration of the loop of primary regulation after Custom peripheral FIFO have been updated. You sign up for this simply by calling the NI VeriStand - Set loop property Type specifying Timed loop to loop type and use peripheral clock be true. Then, as the VI model, thread just the clock of the camera in your calendar input source for the timed loop. If you have specified a decimation factor, as mentioned above, you should probably also to use this factor as your dt. This means that if you have a decimation of 10, you only run your timed loop 10 all the graduations of the source of synchronization clock of the device.

  Another simple way to synchronize closely with the primary control with a few problems loop is simply base your timing off the coast of the availability of new data in your entries or exits FIFO. To do this, you can simply use regularly to loop and then just wire - 1 for FIFO wait times. Then your custom device will run as soon as the data are produced and consumed by the system.

  Specification of a processor

  There is no property integrated for the allocation of the processor, but it will be very easy for you to implement yourself. You can specify the processor to run on in the Explorer system by creating a custom using NI VeriStand - property set the property of the element. For example, you could define a property of I32 entitled 'Treatment', with-2 meaning auto-affectation and any non-negative value indicating an index of specific processor. Set this property in one of your device in System Explorer configuration pages and then read the property in VI of pilot in the engine using NI VeriStand - get the property of the element. Then just wire up the value of the property at the entrance of affinity processor on your timed loop. However, you should always check that this processor is on target. Otherwise the timed loop will report an error and abort. It's exactly what we do for models in-house.

• Triggering off the coast of beginning of Pulse Audio in question DAQmx...

  Hi guys,.

  First of all, it is more a matter of software than hardware, so I didn't post this specific question in the multifunction DAQ card...

  So I'll try to trigger an acquisition finished off the start of a pulse audio, however I have audio sync issues, due to the fact that it can be started before my VI runs. As noted below, the audio is generated and pulsed for 500ms on and 500 ms off the coast, and between these periods, a digital pulse is generated this way (shown in red). I have a problem to stay synchronized, due to the fact that I samples finished for 1 second of a data value, and if the USE EEG is faster than me, I can catch the pulse audio at Midway, rather than at the beginning.

  

  I'm trigger analog outboard of a sound signal of 50mV and capturing two audio channels simultaneously and consistently captures 3 digital channels when they receive the trigger of the beginning of analog input trigger reference digital edge. If digital are slaves and audio is the master in this configuration. The point of this is to get a delta timed material at the time rather than use the timestamps of windows.

  As I said, I use an Analog Edge Trigger Start to start my purchase, what triggers the digital task Digital Edge Start Trigger to start as well. How can I make sure that I start at the BEGINNING of a new pulse audio if I get out of sync, I can't understand this logic... Analog edge goes off just when it goes to the specified level, but maybe it's at half way through the 500ms pulse, so this is my problem...

  I need to be a trigger to start because I do 55 000 this test iterations in a QMH Prod/consumer model and need relaxation to be redeclenchables and start-up is only redeclenchables.

  The variability in timing you see at points 2 and 4 somewhat dictate against the possibility to set up a re-triggering precisely timed by the hardware configuration.  I think that you need to abandon the idea of making repeated sampling finished back to back and switch volleys in a mode of continuous acquisition and treatment.

  To help with this, I aim to capture the moments of digital via meter rather than DIO pulses and be ready to give up the acquisition rate noise much (if necessary) given that you said that your main concern is to distinguish between ON and OFF.

  I must configure the counter to use the Digital pulse as a sample clock and use the sample clock signal HAVE the "time base", i.e. the signal which the edges will be counted and buffered in memory.  This will give you 2 samples per second instead of 5 M and the values of the counter at these sampling points is the index in your AI data which occurred impulses.  Pretty neat and clean.  Just be sure to start the task of counter in front of the task to HAVE it.

  -Kevin P

• How to reset the counter at each iteration, and how to introduce a delay

  Hello world

  First of all I apologize for the basic level of my questions, I'm new with Labview...

  I'm counties of reading out of a USB-6008 labview chip using the DAQ assistant and I write the output to a file. The problem is that instead of giving me the number of levels for each iteration it gives me the sum of all this. How to make Wizard Reset to 0 data acquisition account on each iteration? I tried using a shift register, but it added a counter to my folder and nothing else...

  Thank you very much

  Sure thing. Sorry about that.

• FIFO device custom questions

  Question again on the custom device.

  If there are 200 channels of output but every 100ms only 40 of them updated by the driver.

  Is it possible to write only the 40 channel data at the exit of the FIFO device at a time?

  What is the write FIFO RT speed when writing 200 channels of data at once?

  Thank you.

  If your custom device is a custom device inline, you update only the channels dedicated by iteration.

  In the case of an asynchronous (parallel) custom, you are forced to write always all the channel stack regardless of what happened to values. (if none of the values have changed, so it's ok not to call the Write FIFO function).

  FIFO writing does not cause a huge head.

  You can compare easily than yourself well.

  Tom

• Store the 1st iteration value

  Hi all

  I need to make some sort of calibration for a device of load cell. I want to subtract the value "at rest" or initial of the load cell of the current value that is streaming. I think that there should be a way to use this shift registers, but do not forget that I am afraid that with the VERY FIRST iteration value.

  Please let me know if you have any suggestions as to how I can achieve this goal. I have attached a vi for reference. It uses material so you won't be able to run it, but you should be able to get a better understanding of my research question.

  Thank you very much

  Paige

  
  

• Chemometrics - Non-linear Iterative Partial Least Squares, MathScript and G-Native Code

  I worked with a client on a spectroscopy system and he asks me to do the analysis in components in the application I'm building for him. The current method, I found is what several people have built with MatLab scripts for least partial square. That's great and it works; However, I wanted to convert the native GCode script because I'm that guy.

  After a few days, I was finally able to get the results of the two screws is similar, but not the same thing. I was not able to find an explanation for it on the forums or elsewhere. The important thing I found is that LabVIEW breaks a little when you have a vector calculation as a ' * a, which should translate into a scalar value or a 1 x 1 matrix. When you use this value in another equation, such as the projection X'* a /(a'*a), LabVIEW works only on the first element of X'* a.

  Here, it's in the GCode with the work around to correct one ' * a result:

  

  It seems unusual that GCode treat a scalar result incorrectly. It was annoying, but I was able to go beyond that.

  My next question is there is some apparent rounded differences between GCode and MathScript that I was not able to explain. This difference amounts to about 1% in the data I have to analyze. I've included the project where I worked to compare the two methods. In the NIPALS_Conversion_LV.vi the left side of the block diagram has a loop structure For which is where the model is generated using the NIPALS and the right side is the application of the model. The NIPALS_Converison.vi contains the original code of MathScript where I worked with.

  Note that the difference between the two results is due to the calculation of you and matrices of B, which are related to each other because of the u. I probed the two vi extensively and everything is equal between them until the calculation of the elements in u. The equation in question is u = Y * ((Y'*t1) / |) (Y'* t1) |), even if it is expressed somewhat differently in the code.

  Any help on this would be greatly appreciated.

  Thank you

  Drew

  Drew,

  I took a quick glance to your project and for me, it seems that you have correctly translated the MathScript in its equivalent in the graphical representation.

  My first inclination on why you see this slight rounding error, is that the functions used in LabVIEW and MathScript can be different (from different DLLs). How these functions given floating point rounding may be different and spreading them error thanks to each iteration of the loop. I suspect that you notice that the error at this time in the program. If you compare every step of the script from the execution of LabVIEW and look out past 10 or if the bits of accuracy, I think you will see this error increase slightly after each step.

  If you can find a specific function during which a significant difference between the script and LabVIEW execution occurs, I'd be happy to review the functions and the differences between the LabVIEW MathScript implementations of functions.

  -Nick-

• A generated within a loop in a subvi output data can be transferred to the main program for each iteration of the loop?

  Hi LV users,.

  I have a very basic question, I have not succeeded to asnwer using basic considerations.

  I made a sub - vi that performs a scan of current-voltage using a unit of measurement-source Keithley and a loop FOR.

  The subvi outputs 2 tables with my data (essentially an array of voltage and the corresponding current table). I also defined a Terminal at the exit of a group of these 2 tables in order to plot a graph XY - output. Specifically, I indexed this cluster to update after each iteration of the loop FOR, in my sub - vi (the indicator is placed outside the loop, of course).

  My problem is that I want my main program to display the XY-graph in real time, with an update after each iteration of the loop FOR which is in my sub - vi.

  I have a problem because my sub - vi output terminals are available for the main program concluded as soon as the sub - vi has completed its own execution (which is what we expect of sub - vi to do).

  How can I use a sub - vi (because it's handy) and get in the main program in the course of its performance data that are generated from the loops of sub - vi?

  Thanks in advance for your help,

  Yoyo87

  Elements of the queue in the Subvi them put your main VI where you want to display the data and the.

  It is similar to the architecture of producer/consumer. There are examples of it in LabVIEW. The examples work with 2 parallel loops, in your case a loop (the producer) will be in the Subvi.

• simple question of Web service

  I use a Web Service to publish data, and this question is, I am sure, from my limited knowledge and use of the web servers.

  I am able to set up a 'add' method, pass 2 numbers to the web server and the web server to return a value. Simple. But, I don't know what to do when I want to get the current value of something that is being updated in a loop.

  For example, let's say I have a VI as below and that the user wants to display the current iteration of the loop in their browser, not permanently, but only when they ask for it. I won't use this VI as the method to call. Instead, I would rather pass the current value of a designated only VI VI to return the value of the digital control to the Web server. But I have no idea how (or if) I can change the value of iteration to a method to be called. Does make sense?

  I thought by using session variables, but this requires constantly written to the session variable in my code, which is probably not a big deal, but it would be nice if she only questioned the current iteration when the user asked for it (kind of like 2 numbers are added only when requested by the user in the example of OR). I'm looking for a way to simply return the current value, only when requested by the user.

  

  You can do this, but things get a little complicated.  The web server is its own instance of the application, and I don't think you can (or wants to) have a VI running permanently inside.  When you compile an application with active web services, you get two instances of application - execution of the application, the other inside the web server.  I guess that your loop will run in the instance of the main application.  Put a global functional in it that stores the value all what you want to be questioned on the web and make sure you that VI accessible via the server of VI.  Then, in your web services VI, open a connection to the VI for that functional overall server and run, by reference, to get the value that are stored.

• What happens when you specify multiple iterations of the parallel loop that you have processors?

  I have an app that does the same things together up to 10 times for different material resources. For example, I have a list of 10 COM ports I want to send orders series. I want that they be executed as close to synchronous as possible, but up to 200 ms sync would be acceptable. Currently, I use a loop set up to 10 parallel iterations and assume that LabVIEW will juggle processors according to the needs, the iterations run it as simultaneously as possible. Experimentally, LabVIEW indeed seems to create 10 parallel loops, even when running on a computer with only 4 logical processors, otherwise you go 10-element inside the loop would only be not able to complete, right?

  My question is, I'm doing something verboten with my number of iterations of the loop? According to the help of LabVIEW for loop iteration parallelism dialog box: "If you plan to distribute the VI on multiple computers, set number of instances of parallel loop generated equal to the maximum number of logical processors, you wait for one of these computers contain never.» Clearly I'm violating this opinion and yet it seems to work. My performance will essentially be the same as if I had 10 blocks of code in parallel on the block diagram?

  "Reading'how many Threads don't LabVIEW allocates?" links to this page, it seems that, at worst, LabVIEW is hungry for thread and switching of threads between iterations, but my short demand slowing down enough to accommodate this suboptimal situation. At best, LabVIEW has allocated 4 threads per the enforcement system, so as long as I have at least 3 processors, there are at least more son than the parallelized loop iterations. It's all a bit confusing.

  RnDMonkey wrote:

  I have an app that does the same things together up to 10 times for different material resources. For example, I have a list of 10 COM ports I want to send orders series. I want that they be executed as close to synchronous as possible, but up to 200 ms sync would be acceptable. Currently, I use a loop set up to 10 parallel iterations and assume that LabVIEW will juggle processors according to the needs, the iterations run it as simultaneously as possible. Experimentally, LabVIEW indeed seems to create 10 parallel loops, even when running on a computer with only 4 logical processors, otherwise you go 10-element inside the loop would only be not able to complete, right?

  My question is, I'm doing something verboten with my number of iterations of the loop? According to the help of LabVIEW for loop iteration parallelism dialog box: "If you plan to distribute the VI on multiple computers, set number of instances of parallel loop generated equal to the maximum number of logical processors, you wait for one of these computers contain never.» Clearly I'm violating this opinion and yet it seems to work. My performance will essentially be the same as if I had 10 blocks of code in parallel on the block diagram?

  "Reading'how many Threads don't LabVIEW allocates?" links to this page, it seems that, at worst, LabVIEW is hungry for thread and switching of threads between iterations, but my short demand slowing down enough to accommodate this suboptimal situation. At best, LabVIEW has allocated 4 threads per the enforcement system, so as long as I have at least 3 processors, there are at least more son than the parallelized loop iterations. It's all a bit confusing.

  In this case (where you're interacting with the external hardware and have an appointment) there will be a delay of inheirant at each iteration.  THUS, "Oversubscibing" or by allowing the parallel proceedings as logical processors, actually improves performance by running another period of waiting during the iteration.  In fact, you're not "Violate the advice" of oversubscibing.  You use this technique correctly! Just may not have read about this.  See Esp PP 4