Empty array 1 d

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• Insert references VI in an empty array of objects

  Hi all

  I shopped, but I can't seem to find the answer to this particular question.

  Platform: TestStand 4.2.0 LabVEW 8.6.1.  Customer resists upgrade.

  I am trying to build a list of VI references to a variable of TestStand.  TS is an empty array of references to object called Step.VI_References.

  BT, I take the context of the sequence (from "ThisContext") and read it as an object of property.  I then take this reference and use it with search GetPropertyObject Step.VI_References.  I have a table of references VI (of type TS. PropertyObject) that I am an iteration more to extract each reference.  It is then to be inserted by using SetPropertyObjectByOffset.  See the attached picture for the relevant bit of code.

  My problem is I'm getting an error-17300 - essentially a "NULL pointer unexpected shipping reference" SetPropertyObjectByOffset call - even with just a reference to be inserted.

  It doesn't seem to be a mistake to place else, but whenever I try to access VI_References in table form (using any table API), it gives the same error.

  What obvious (or subtle) thing I'm missing?

  Thank you

  Geoff

  If these are references, you must use SetValInterfaceByOffset instead of SetPropertyObjectByOffset.

  Hope this helps,

  -Doug

• For automatic indexing loop should not index empty array

  Hi guys,.

  I wanted to say in this VI remove empty elements in the table. He worked for table 1 d, but as soon as I gave him a table 2D, for some reason that I was unable to remove empty elements:

  

  

  sdfsdfsdfadgadf wrote:

  So when I was debugging, I saw at the 3rd row and 4th iteration of line, out of the inside OF the terminal loop index outter loop is [].

  Should not the terminal of the index of the outer loop treat [] as 'skip it '?

  In this case, the tunnel of indexation in the outer loop takes an empty 1-d array and adds it as a line to the 2D table. Because the 2D tables can not be serrated, it fills the remaining elements of the line (all) with the default value. Maybe we could say that an empty array should mean 'add all', but this behavior goes back very far and I don't know what effect this would have. As mentioned, it is easy enough to do what you want with a conditional append in the outer loop.

  sdfsdfsdfadgadf wrote:

  I mean what you described certainly applies if [] a something, but in this case it didn't. To prove the point, try something like this:

  

  Check the size of the table. You will find that it is 3,0,0. In other words, you have 3 pages, each with an empty 2D array, which is exactly what builds your code.

  I try to avoid dealing with > 2D paintings and which deals with the cases where they can be empty, so I don't remember the details of why this happens, but IIRC, it follows the rules of the system.

• Problem with pushing the attribute child xml to an empty array

  Hi guys,.

  I have another problem with the bet, or should I say, pushing data from an xml file to an empty array, as I stated earlier.

  During the xml_mc.onload, I can see the data, but after that, it becomes undefined.

  It seems that I couldn't find the solution on the net as well. I suspect that's not possible, but I'm not giving up.

  Please help me.

  Thank you.

  This is the code example:

  var monTableau = new Array();

  var xml1:XML = new XML();

  Xml1.ignoreWhite = true;

  Xml1.onload = function (success: Boolean) {}

  {if (Success)}

  var nodes = this.firstChild.childNodes;

  for (i = 0; i < nodes.length; i ++) {}

  MyArray [i] = nodes [i].attributes.name;

  }

  Text1. Text = MyArray [2];  to check if the 'name' attribute is visible

  } else {}

  trace ("could not load the XML");

  }

  }

  Xml1.load ("icons.xml");

  Text1. Text = MyArray [2]; I commented on the first text to try to display it again, and the result is not DEFINED...

  the XML would look like this:

  icons. XML

  < icons >

  < name of icon = "icon1" / >

  < name of icon = "icon2" / >

  < name of icon = "icon3" / >

  < name of icon = "icon4" / >

  < / icons >

  Thank you

  I do not understand your problem.  Table fill with data.  If you expect this second "text1.text ="show another thing that 'no set', it won't happen as you wrote it. "  This line of code is run before the onLoad function (code execution does not wait for loading files).  You want only to deal with the processing of the data, once the onLoad function he treated in the table.

• An empty array to a worksheet string, delimiter

  The string table worksheet function does not accept an empty delimiter, it uses the tab character in such a case.

  The same is true for string array spreadsheet function (but of course this function can not work without a delimiter).

  I would appreciate one of the following options:

  • to allow a blank separator for the two functions (for string in array of spreadsheet that can easily obviously works for the worksheet to an array of strings, you might see a delimiter of empty string between each two adjacent characters similar to the function search and the string to replace with an empty search string);
  • to document this behavior correctly;

  I prefer the first espacially option for the string table worksheet function. What do you think?

  aschipfl wrote:

  The string table worksheet function does not accept an empty delimiter, it uses the tab character in such a case.

  It is an old story covered in my idea here. (as of 2009!)

  If there is more insight, it should be added as a comment to the idea of city.

  Let's keep the discussion all in one place! Thank you.

• IMAQ rake 3 VI - map Edge returns empty array

  Hi, I have a U16 image that requires analysis using the rake 3 VI IMAQ.  Out of lines of research, the strength is indicated for each point along the line of research, but the card edge (I expect brings together the strengths and assembles them in a table for each line) returns empty.  Anyone else seen this?

  

  Check the source of the "optimized" for IMAQ rake 3 Mode...

• adobe.dps.store.getEntitledProducts returns an empty array

  Greetings,

  When you use the adobe.dps.store.getEntitledProducts function, I expect to see a table of the product ID.

  But all I get is an empty object.

  When visiting the url that we have entered as 'service url' followed by 'rights' and by the way the authToken and appid etc.. I get a list of ProductID.

  Thus, this function is not doing the same thing?

  Please advice...

  Concerning

  Mario

  A little.  It returns a list of products right known for the application of the observer.  If something isn't right - possibly the user has not signed-then the list would be empty.

• 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

  
  

• How can I reset a default (empty) table call other than nodes?

  I used the reset all failing to invoke the node and the specific call node in order to reset the two tables in my Subvi each time the Subvi is run in my program (main VI). I use the Subvi perform steps, but the steps I take continually stack on the other. I have these as outputs wired berries so I don't think I can grab an empty array and call her nodes are enabled (and no code return error!) whenever the Subvi is executed, but these two paintings is not reset to their default value, empty values at the beginning of each passage. All ideas are welcome; I appreciate your help. Thank you!

  I managed to get almost what I wanted by replacing the nodes of comments that I used (to build the two tables), with offset, and then initializing registers Maj records at the beginning of the program. The problem there was that the encoder I used for the measurement of the angle would start up where it left off (at 400 degrees rather than 0, even if it was a new set of data). On the other hand, he deleted the previous data set, which is what I wanted. I think I'm able to work with it; The first measure can be 0, so I just need to use the last measure known as an offset or something... Suggestions are always welcome; Thank you all for your time!

  Edit: For the sake of simplicity I just moved initializers of the nodes of the property to the farthest loop and it does the same thing.

• Adding items to an array of unknown size several times

  Hey,.

  I had an application that communicates with a device (a generator of microwave) via the Protocol modbus RS-232. It is within a state machine. The VI running generator initialization first and then move to the State 'pending', where I have a structure of the event to follow any value change of control. In the structure of the event, a timeout of 300 ms is implemented, because communication to the generator must be active at least every second (if not a defect is reported). In the case of timeout I read all record and display values.

  Within this time-out I would record a value of the indicator ('measure Pfwd') several times in a 1 d table (the table size is unknown!). However, I would like for the variable to record only when the indicator 'MW?' is 'TRUE '. And "MW?" goes from 'FALSE' to 'TRUE' every time, I would like to start writing on a table from the beginning.

  I tried several options, including the table to remodel, but I can't make it work. Or it works in a separate VI, but when I use it within the structure of the event and state machine, nothing works.

  If someone has an idea, it would be welcome...

  Thank you

  Concerning

  Create an another shift register which is initialized with an empty array of the correct data type and use the node Build table add data to it when you want that he added.

  In BT, the size of a table doesn't have to be declared in advance.

  Mike...

  PS: other tunnels must be wired throughout.

• Is it possible to define a control in the form of an array of ring box?

  I would like to have a control panel that I can define the dimension and restrict the value use can enter. I thought about a table of ring for which box I could initialyse the dimension. Is it already possible? any reference to where I might start?

  Thank you

  Olivier

  Just drag the control in a container to empty array. If you are referring to a ring of menu, its default data type is U16, so regard LabVIEW, a menu of the rings table would be no different from an array of U16 values, which is an array of integers not signed, 16-bit.

• Read empty return Sets

  All,

  I have the code attached to a loop of a VI.  I run this code about once per millisecond during tests (~ 30 sec) short.  She usually works well, but sometimes read funtion returns an empty array.  When she did this, 'AvailSampPerChan' returns 0.   Why would he do that?  Should not be expected samples available before reading?  Is there a simple way to stop this and wait for the samples to be filled?

  It is not return an active error when this happens.

  System Specs:

  Acquisition of data USB-6009 8 lines AI at a sampling frequency of 3000 s/s of reading.

  Any help would be greatly appreciated.

  No, you really should have the Schedule VI.  Otherwise your DAQ is served only when you ask in the software.  If you really need the 3kS/s, it must be hardware timed and keep the value of the samples.

  What determines your rate of loop for when you read the DAQ data?  Think you can try to obtain data more often than the data actually happens.  You say you're looking for data on every 1ms.  At a rate of 3kS/s, you should have 3 samples available.  But that's assuming only 1 channel.  The heat flow is actually samples/channel/second.  Thus a full analysis will be in 8s /(3kS/s) = 2.7ms.  You try to read these data too quickly.  Slow down your loop.  Or set the frequency of sampling to 24kS/ml/s.

  Or say that the DAQmx read to get X samples when you try to read the data.  As I said earlier, the default value is simply enter all available data (- 1).  If there is no data, you get no data.  However, if you specify a number of points to read the DAQmx Read, he will wait that number of samples coming.

• Adds data to the binary file as concatenated array

  Hello

  I have a problem that can has been discussed several times, but I don't have a clear answer.

  Normally I have devices that produce 2D image tables. I have send them to collection of loop with a queue and then index in the form of a 3D Board and in the end save the binary file.

  It works very well. But I'm starting to struggle with problems of memory, when the number of these images exceeds more than that. 2000.

  So I try to enjoy the fast SSD drive and record images in bulk (eg. 300) in binary file.

  In the diagram attached, where I am simulating the camera with some files before reading. The program works well, but when I try to open the new file in the secondary schema, I see only the first 300 images (in this case).

  I read on the forum, I have to adjust the number of like -1 in reading binary file and then I can read data from the cluster of tables. It is not very good for me, because I need to work with the data with Matlab and I would like to have the same format as before (for example table 3D - 320 x 240 x 4000). Is it possible to add 3D table to the existing as concatenated file?

  I hope it makes sense :-)

  Thank you

  Honza

  • Good to simulate the creation of the Image using a table of random numbers 2D!  Always good to model the real problem (e/s files) without "complicating details" (manipulation of the camera).
  • Good use of the producer/consumer in LT_Save.  Do you know the sentinels?  You only need a single queue, the queue of data, sending to a table of data for the consumer.  When the producer quits (because the stop button is pushed), it places an empty array (you can just right click on the entry for the item and choose "Create Constant").  In the consumer, when you dequeue, test to see if you have an empty array.  If you do, stop the loop of consumption and the output queue (since you know that the producer has already stopped and you have stopped, too).
  • I'm not sure what you're trying to do in the File_Read_3D routine, but I'll tell you 'it's fake  So, let's analyze the situation.  Somehow, your two routines form a producer/consumer 'pair' - LT_Save 'product' a file of tables 3D (for most of 300 pages, unless it's the grand finale of data) and file_read_3D "consume" them and "do something", still somewhat ill-defined.  Yes you pourrait (and perhaps should) merge these two routines in a unique "Simulator".  Here's what I mean:

  

  This is taken directly from your code.  I replaced the button 'stop' queue with code of Sentinel (which I won't), and added a ' tail ', Sim file, to simulate writing these data in a file (it also use a sentinel).

  Your existing code of producer puts unique 2D arrays in the queue of data.  This routine their fate and "builds" up to 300 of them at a time before 'doing something with them', in your code, writing to a file, here, this simulation by writing to a queue of 3D Sim file.  Let's look at the first 'easy' case, where we get all of the 300 items.  The loop For ends, turning a 3D Board composed of 300 paintings 2D, we simply enqueue in our Sim file, our simulated.  You may notice that there is an empty array? function (which, in this case, is never true, always False) whose value is reversed (to be always true) and connected to a conditional indexation Tunnel Terminal.  The reason for this strange logic will become clear in the next paragraph.

  Now consider what happens when you press the button stop then your left (not shown) producer.  As we use sentries, he places an empty 2D array.  Well, we dequeue it and detect it with the 'Empty table?' feature, which allows us to do three things: stop at the beginning of the loop, stop adding the empty table at the exit Tunnel of indexing using the conditional Terminal (empty array = True, Negate changes to False, then the empty table is not added to the range) , and it also cause all loop to exit.  What happens when get out us the whole loop?  Well, we're done with the queue of data, to set free us.  We know also that we queued last 'good' data in the queue of the Sim queue, so create us a Sentinel (empty 3D table) and queue for the file to-be-developed Sim consumer loop.

  Now, here is where you come from it.  Write this final consumer loop.  Should be pretty simple - you Dequeue, and if you don't have a table empty 3D, you do the following:

  • Your table consists of Images 2D N (up to 300).  In a single loop, extract you each image and do what you want to do with it (view, save to file, etc.).  Note that if you write a sub - VI, called "process an Image" which takes a 2D array and done something with it, you will be "declutter" your code by "in order to hide the details.
  • If you don't have you had an empty array, you simply exit the while loop and release the queue of the Sim file.

  OK, now translate this file.  You're offshore for a good start by writing your file with the size of the table headers, which means that if you read a file into a 3D chart, you will have a 3D Board (as you did in the consumer of the Sim file) and can perform the same treatment as above.  All you have to worry is the Sentinel - how do you know when you have reached the end of the file?  I'm sure you can understand this, if you do not already know...

  Bob Schor

  PS - you should know that the code snippet I posted is not 'properly' born both everything.  I pasted in fact about 6 versions here, as I continued to find errors that I wrote the description of yourself (like forgetting the function 'No' in the conditional terminal).  This illustrates the virtue of written Documentation-"slow you down", did you examine your code, and say you "Oops, I forgot to...» »

• change the size of array without initializing

  Hello

  I'm trying to dynamically change the table size.

  I'm doing a calibration of an instrument and from time to time I read 3 parameters and try to write in an empty array (do not reset) and caclulate interpolation polinom according to my measured data.

  The table must be empty because I use the same table as input for the calibration procedure and it may not contain the zero but only the measured values and it will develop that my flow measurement.

  I hope that my question is simple,

  Kind regards

  Sasa

  Hello Sasa,

  two options come to mind:

  (1) use the BuildArray to 'grow' your table of measurement points. Add only "not null" points to the table...

  (2) search the forum for discussions on 'remove items from the table', you will find something like this...

• Dynamic release of variable size of dispatch class method array on FPGA

  I have a parent on the FPGA class that will serve as a model/framework for future code which is developed. I had planned on creating a class of the child and by substituting a few methods. The child class constant would have fallen on the schema so that the compiler would have no trouble knowing which method (parent or child) should be used (i.e. the parent method will in fact never used and will not be compiled with the main code). The output of one of the methods is a table. This table will have a different size depending on the application. I set the size of array as a variable. In the method of the child, there is no doubt about the size of the array so that the compiler must be able to understand. However, when I try to compile, I get an error on the size of the array. I can't figure a way around it. Any thoughts would be greatly appreciated!

  Thanks, Patrick

  

  The question implies the use of the register shift unitialized. On the first iteration of the loop, the value that comes out of the shift register is the default value for the data type, which is an empty array for a table (size zero). Therefore, unless wire you a table empty for the shift register to the right, the size of the array cannot infer statically by the compiler.

  To resolve this problem, you must feed an initial value for the table. Here, I just used the function of the matrix, but if you need to have a separate method that returns an array of default or the size of the array that will work as well.