Table to initialize

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• How to convert a single scalar value in a table for the graphics path

  I try to establish a curve of output power of power factor vs. But my power factor shows a single scalar value (DBL) and power output is table 1 d of scalars. suggest me a way to trace "output power (Pout) vs power factor".

  It will be a really boring plot (a single line with any power factor you have), but you can use the table to initialize with the size of the switchboard.

• The FG table storage: memory errors

  Hello everyone, this is my first post here, I hope it's in the right place :-)

  I was making mistakes of memory.  I am running LV 32-bit on a system with 24 GB of memory. I understand that LV may use only 2 GB of memory, even if I used the utility followed memory to trace a problem at one of my Subvi, in which I use a functional global to store arrays of data.

  My LV program periodically takes in an array of new data.  Whenever a new data table is received, I divided into its constituent parts and store these components in another series of paintings.  I use the USR to store the functional arrays as globals, since I heard that this tactic will improve performance.  However, using the utility followed memory, I find that the Subvi takes much more memory than indicated the amount of data stored.  So, I guess the Subvi has made multiple copies of data than expected.

  Could you please take a look at this VI someone and tell me what "rule" I am breaking what problems?  It is not too big, I think we should that the eyes of an expert.  I'm still a little new to LV :-)

  Thank you!

  Brian

  How much data are you trying to store in this functional overall?  How often is it updated, and how many times it is called between resets?  If you know the maximum size of the data you need to store, it may be better to have the case reset allocate arrays of this size (instead of empty tables) and then maintain an index indicating both the current size of the table and the position to insert the next piece of data.  It will be more effective than to build the table.

  Now, even if you have enough memory to store all the data, it can be too fragmented to be usable.  Whenever you use array of generation in the loop, LabVIEW will allocate a new array of the current size of + 1 and then copy data to it, after which it can make memory of the former small table available again.  The next time the loop for this once again, setting up small blocks of memory available which may not be contiguous and are too small for reuse when the berries then need to grow.  Pre-allocating berries to the maximum size and then replace the items one at a time (as new data arrives) will solve this problem.  In addition, it will be faster, because it takes less time to replace one does it to copy all of a table to a new location.

  In addition, there is no need of the loop for use replace table subset.  Delete the register shift and let the autoindexing to build the output array.  You actually produce an extra copy useless trying to reuse the table, instead of save memory (because there is a copy in the shift register and the other being used for autoindexing).  For loops are effective for the construction of the tables because their maximum size is known before the loop begins.  In addition, the table to initialize is unnecessary - you are initializing the values that will be immediately be replaced - and you don't even have the function of the size of the array.  I'd do it as shown below:

  

• Mutliplyng a table 1 d

  I tried a few methods and searched I just can't understand it.

  I am multiplying one table in itself and receive the 2D Board logic.

  I tried a while loop and multplying each elemnt by a full line/colum then build table, does not work.

  I've tried a few others with table to initialize and replace, shift, matrix conversion register and multiplying etc.  just does not work.

  any suggestions?

  My fault.  My linear algebra is not what it was I suppose.  Try this out...

  

• Initialize the array, then using a feedback node to replace items

  Hello friends,

  I have a typical problem. I need to store values in a table 1 d with 7 elements. I want to start with a set zero array of items. I then start sending values and indices one by one so that the value is inserted in the table and is stored. My problem is when I start with a zero table, what happens is every time I have send a value that it replaces a zero to the correct index, but does not store this value for the next iteration as the zero table defines the table to zero once again. Changes as well as an item in the table all the time. I won't like that. Once started, I want all my values stored in the corresponding index, unless until a value with the same index overrides. Here is my attempt in jpg format. I tried to insert a table of zero which takes place once in a while loop and then connect the spare in feedback mode Board so that the insertion of elements Dummies happens only once. But I am not able to do. Please help me view inthi

  

  Your image shows that you cannot have a 'next iteration"because there is no point in loop around the code of the replacement array element and the while loop around the table to initialize is useless. You are not clicking on the button "Continuous run" are you? Do not!

  Here's a basic example. You can learn a few basics of LabVIEW by taking some of the tutorials.

  

• Global functional table uses 2 x initialized space?

  I had a thread going on the reduction of the memory allocation on our LabView RT system located here for reference http://forums.ni.com/ni/board/message?board.id=170&thread.id=413552 .

  I use a global functional / Action engine to add to a U32 table that I'll be back to our FPGA PXI via DMA reads cards.  In order to keep the determinism, for the first time this table through the AE to its maximum size (18Million).  During my debugging process, I decided to run the 'Performance and Memory '.  When I put the number of elements to initialize to 18,000,000 I expect the performance tool to show me that this VI takes over 18 000 000 * 4 bytes = 72Mbyte.  However, after this VI running by clicking on the button instant I see this VI meet twice as many 144Mbyte, extactly!

  Then I ran the tool to 'See the distributions of buffer' and with 'Tables' checked, I see a black dot on the table to initialize primitive and a black point on the passage of the leftmost register.  By clicking on the button "help" in this tool I see it say under the table section "to avoid abuse of global and local variables when working with arrays. Reading of a global or local variable causes LabVIEW to generate a copy of the data. "This must be what happens now, but how am I supposed to store these data with the flexibility of an adverse event and do not have an extra copy floating around?

  Here is the part pertient EI for your reference:

  

  Hello

  When you use the function "Initialize the array", you create an additional table. Use the function "Remodeler Array" reuse the already existing table. See attachment.

• Remove a line from several tables

  Hello

  I have a form that has what appears to be a single table.  Given that I needed 30 column (29 of them are single character fields) I had to use 2 objects from the table.  Then I had the ability to add and delete lines.  Add a line at the end is pretty easy.  Deleting a specific line is the problem.  For now, I added a third table that has a header line and a line of item body.  the body line is a button with the intention to withdraw this entire line of the table.  In other words, need remove the line in all 3 tables.

  My structure is:

  • Form1
    • (Some other subform past who is not serious for us)
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        • ContractorTableRight (a table with the right 15 printed columns)
          • HeaderRow
          • Contractor (a row of data to be deleted when it is clicked on CellButton above)
    • (Some other subforms that I'm not worried at the moment)

  The 3 tables are aligned to the headers of all line up, no space between them.  Body lines line up then and it looks like a large table.  From left to right, they are:

  ContractorTableRemove, ContractorTableLeft, ContractorTableRight

  Point lines and contractor are added when you click on ButtonAddRow in the header of all.  The initial number is set to 8 for each table, so I get 8 rows at the start. The minimum number is set to 1 for each.  I know that each row in each table has the same index number, because I filled in a cell in each table cell initialize durig.  This line, in the click event of the CellRemoveButton removes the row of the cell in this table:

  This.parent.parent._item.removeInstance (this.parent.index);

  I tried all kinds of ways to remove the same line (using the index #) in the other 2 tables: ContractorTableLeft and ContractorTableRight, but do not seem to get the correct correct syntax.  I tried hard coding references, using .parent as shown below and also tried to use an index 1 just to try deleting a line with no result.

  this.parent.parent.parent.ContractorTableLeft._Contractor.removeInstance (this.parent.inde, x);

  Can someone get me the correct syntax here?

  For example put a button Delete hidden on each table, click on that I saw, but I'm afraid it will get in the tables on each side of the table, in that it is the trail.  I reeally want just to refer to the line and remove it if I can avoid all these problems of further removal can cause problems.

  I copied the form to https://Acrobat.com/#d=7M8R50rEHf4AaVXppwyKLw

  Hi Karl,

  Here is your form you: https://acrobat.com/#d=oRRJP3W * OgBk6DqXXbJhgg.

  I've corrected the Add button, the button Delete and remove the button at the top. I annotated the script, so I hope you can follow.

  Hope that helps,

  Niall

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  Hi, this is a must to create users as part of the responsible security?
  
  are there tricks to load the list of users in the database?
  
  Thank you

  1. always try to search the forum first of all, I'm sure that everything is already written here:
  can we use authentication two different in the same repository

  2. There is obiee. doc, chapter 15 - security in Oracle BI (security, authentication, etc.)
  http://download.Oracle.com/docs/CD/E10415_01/doc/bi.1013/b31770.PDF

  3. If you need an example to load database users by using the external method:
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  http://108obiee.blogspot.com/2009/03/external-table-authentication-and-row.html

  Concerning
  Goran
  http://108obiee.blogspot.com

• plot of color

  Hello

  I want to do all my black plots, when I do this in my VI running, get errors, because the number of plots is not always the same... So I made a table to initialize and then try to colorize my plots, but it won't work...?

  

  Anyone?

  Hello Thijs,

  Please do not forget to transpose the 2D table, otherwise you will read the wrong table.

• When to add several new lines to a picture - is there a 'best practice' to use here?

  I need a picture of evolution.  It won't change much, but it must be done.

  In MatLab, I would write:

  

  Now I expect it's pretty.  I know that I could wrap it in MathScript if I wanted a 1000 x hit in performance (link), so I try to avoid this.

  If I had to do the following in LabVIEW, would he bomb somehow that my intuition MatLab does not inform?  Is there a more preferred way to do?

  

  Note: the entries are the same between the VI and the MatLab script.

  I would just subtract the number of rows in the table to initialize and index with this number of lines unlike wanted.  Use the number of columns for the second dimension.  Then build table and replace table subset.

  

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  I recently started on the MyRIO, NOR I have the following code to handle a ultrasonic rangefinder:

  

  However, when I try to compile I get the message:

  

  Apparently many of the most common features of Labview can not be used on a FPGA target. However, the code for the Rangefinder is a small part of a larger project in which I have to use such functions, so my main concern is the weather, I'll be able to integrate this code with 'normal' labview FPGA code on the myRIO, if possible, how?

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  Thanks again for helping me.

  Here's the thing with FPGA: you configure real equipment.  Everything must be fixed to the size.  So if you don't have to use an array, you must configure it to be a fixed size (right click in the control to set the size, use the table to initialize or LOOPS containing a fixed number of cycles, and autoindexing).

  As GerdW said, FPGA is not a GUI.  So, you will want to use a DMA FIFO to send your data to waveform until the RT.  You create in the project.

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  If you're only terminates the loop when there is a positive placement test, you will need to use the loop.