constant matrix

Similar Questions

• Shortcut to jump upwards or downwards in a constant matrix?

  Okay, so lets say that I need to create an array of 10 elements. After I create a table empty and extended to 10 items I click the first index, type the content, then click on to the second marker, click, type, type, click aaaargh.

  Sound so disturbing that I always need to touch the mouse when I want to change the index I change right now. Do we not have a shortcut for jumping up and down between the elements?

  Remove also the elements of an array is a huge pain in the butt... rightclick-> data-> item delete operation. Once you need to delete 100 items in a table, you need a good amount of coffee and / or sedatives.

  Please, help me by communicating these secret shortcut keys.

  Thank you.

  
  

• How to create a multidimensional array constant?

  I have a code where I'm trying to mathematically manipulate tables in a while loop. I was counting on multiplying one table by a constant, but on the second iteration the constant actually eventually change to an array of different constants *. So, I would define an array of constants to a single value. I did it using the 'constant matrix. I stuck a double constant Interior point and wired it me terminal. A problem I have is that the size of the array is not matching my another Bay. In the box to the left of my constant value double point, I put in '10' because the size of the table I want is 10. Instead of generating a table of 10 elements with all the same constant, it created... uh... nothing. I received null: []. What I am doing wrong?

  Then, is it possible to set the length of this array based on the length of another table? For example, the table I want to work with that is 10 items, but it may not ALWAYS be 10 items. I would like to put in some flexibility so that if it passes 30 items, the constant table that I create will be smart enough to know that it must also be an array of 30 items.

  In addition, I apologize to not include an image. The computer with LabVIEW is not the same as the computer connected to the internet. Promote my frustration, the only way I can transfer data from this computer translates into encrypted data unless I have to burn a CD. Oh working for the federal Government is sometimes a treat.

  * The constant becomes a table of constants because the process is iterative. I start with an estimate of the constant, but then this assumption is updated by the values in the table, forcing him to become a table itself.

  And if you really want to continue to use berries, yes there is a way to make the length of you table identical to the length of another table.

  Here is an example with a 2D array:

  -Table is the original array

  -10 is the constant which acts as the multiplier

  

• entering data in the table-constant

  Hello

  is there a possibility of comfort more to enter a large number of values in a constant matrix in the block diagram? I want to built a constant with several hundred values without having to type them. For example to cut and paste?

  Thank you

  Christian

  If you can read data from a file or a database, you can simply load the data and the output to an indicator.

  Select the indicator on the block diagram, right click and select "change constantly.

• Entry in the array constant of gray

  I have a constant matrix 3 elements

  

  I want to remove the 3rd element and gray outside, so it looks like this

  

  Can't find one good way to do it other than remake the table in its entirety. It is very good when the table has only a few items, but when it's a reference to a shared variable of 50 table, it takes a while.

  Thank you

  Specifically, right-click-> data-> item Delete operations.

• "black square shrinking" appears when some the search results for "Array Constant" are double-cliquée.

  In the process of troubleshooting an issue of size of table, I did a Ctrl + F search after selecting a constant matrix.  I find a large number of raster constants in the search results.  However, many of these results (most behaves normally), if the item in the search results has double-clicked, momentary displays a black square, about the size of a standard icon, which immediately reduced to nothing.  There is no indicator selection outline.  I used this nice ShowAllControls & TabCtrl .vi utility to display all the controls, but nothing appears in this place.

  Someone has encountered this?  So far, it's just a nuisance. I am not free to view the code that was developed by a third party.  I would like to make a screenshot, but the black square disappears too quickly.

  
  

• Initialize the array 1 d with predetermined values

  Hi all

  I'm pretty new to the comm suite, but I'll have one (probably simple) question about the initialization of a constant matrix of 1 d. Suppose I want to create a constant 1 d of the matrix of size M and I want to boot with some predetermined values. Is there an easy/effective way to do it? Initializing one is rather heavy, especially for the great Mr. also, how can I initialize such constant on a Traget FPGA?

  I've seen that for example for metering screws, it is possible to define a constant flow of data and initialize it with a .cvs file. Is there a similar possibility to initialize a constant matrix of 1 d?

  See you soon,.

  Steve0

  Hi Steve0,

  I found a quick solution and dirty to do this, as there is not a clear method to implement a constant matrix arbitrarily large. You can generate an array, but you prefer, my example is seen below:

  

  Then go to the front, right click on the indicator and select "capture". From there, this table will be available on your range of data to drop as a constant of other VI in this project. You can also do the same with a CSV file by writing your CSV file to a flag and then enter the data to use.

  BeenCoughin

• Boolean reference table

  How do I create an array of Boolean reference?

  Steve

  Hi 4BoysDad,

  You are eager to create an array of Booleans in LabVIEW?

  If so, you can place a constant matrix down, then place a Boolean constant inside the empty array. This will turn it into an array of data type Boolean. Then you can stretch the table to add/remove the number of items in the table (or use the up/down arrows index).

  If you try to do that in something else than LabVIEW, let me know.

  Also, for any future reference your post will get more action if you post them in the appropriate sub-forum. This forum is for our DSA material, post it in the forum LabVIEW will result in faster responses.

• Details of allocation memory (cRIO vxWorks)

  Hello world

  A question about memory allocation when dealing with arrays, strings and string array.

  -I have to build and produce log files of the ASCII (LAS 2.0) on a cRIO.  The cRIO already done tons of other operations and avoiding excessive fragmentation of memory and overall memory usage is an important consideration for us, but CPU is also a limited resource... This new requirement is an addition to "everything" the cRIO already, and I know from experience that manages large data and logging as string files are taxing on the CPU, but also memory, so suggestions are welcome.

  Worst?) If I build the file whole by concatenation and set up the content of the file as one long string through one shift-register/ring to another, as it goes, more which I think is the worst possible way to do it from a management perspective of memory.

  (Better?) If I build the content of the file line by line and create an array of strings where each element of the array corresponds to a single line, it will be better? As each item is a variable length (String), I don't know how the memory manager manages these tables? Ideally, this is a list of pointers, so that each element (of variable length of the string) is its own segment (contiguous) memory vs all elements in the array in a single contiguous block? If so, that would mean that an array of strings would require nearby less memory than the same data represented as a 1 d of U8 array?

  An advantage I can think of the approach of the matrix (or line) is when it is time to write the data in the file, I could write each element of the array individually, once again, the idea is that there should be less overhead to manage the lines individually vs a giant stream on the disk memory?  I could then possibly construct/write of the file into blocks so that I'm never content of "whole file" in a row of table...

  Better yet? -Anyone have any ideas?

  Best? n ' matter who feel that they have completely tamed this beast? Do you want to share?

  As a mark of separation, unfortunately, all the data that will eventually be the file do not exist when the file is first created (trace-additional scans are added as soon as they are available throughout the day), and while the raw data itself in the LAS files are in the last section (so new raw data can be just added to the file of string without loading / parsing of the file) , there are some areas in the previous sections that may need to be updated (for example the tag STOP in the ~ section W), I was counting on the manipulation by a number of bytes for the fields that must be updated after the creation of follow-up, but if anyone has experience overview they can share on this subject as well , I am to listen to (in the case otherwise, I'll probably keep these counters in a list of attributes for quick recovery variant and simple because I maintain log files individual person well and therefore need a way a little more organized to follow that just a table or similar).

  Like that everyone would just learn to consume newspapers of PDM files we recommend that rather than insisting on all these other formats. :/

  (For a similar project (WITSML files), I ended up finding a relatively significant performance gain by building a large part of the ASCI file content as possible from the constant matrix U8, but luxury with this project was so much the structure/content of a static file that it was very, not to mention the WITSML requirement was for a scan/trace by file) , so it was create and forget.  It's been a HUGE calculate time and the difference in CPU usage.  Not sure this makes a real difference as far as its use/allocation of memory went other than constants of course being constant/charge with the VI and possibly optimizations the compiler as a constant U8 is potentially easier to work with than the strings (and string constants?).)

  I am logging the data locally on the disk with my different projects cRIO, because Yes, people just can not and will not use the TDMS files. What I do is I pre-allocate my paintings of strings - for example one the point current data to be logged out of the text file is an array of strings of 1 d, 1 item per channel, I have created by first creating an array of fixed size U8 (INIT 1 d array, say 16 bytes), conversion to string and then initialize my array of strings (INIT 1 d array again).

  I keep this saved allocated string of 1 d table change. When it comes time to write a new line to my account, I browse the table, using a loop FOR and Place the item Structure (not), new values in connects.

  I do everything with CVT or variables shared so I just read the tags by program and do a 'chain of fractional' on them. To write the string in the file I keep a last number of bytes and simply go to the file position and write.

  So far I didn't problems with leaks memory or fragmentation - you see the largest continuous block only decrease and then remain constant.  My systems typically run a week to a month between resets.

  It sounds like you are already planning to do this: work with arrays of pre-allocated chain. I'd say it's the way to go.

• 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

  
  

• delete 2d array in the while loop

  I have a table 2D being initialized outside of the loop executing a state machine, how would a clear table 2d in the while loop? I guess I'm not sure what to wire a constant matrix empty 2D too =)

  When you want to erase (regardless of this Boolean condition), wire just a constant matrix 2D of your shift register.  See attachment.

• How to read the worksheet for setpoint speed using the speed control (Closed Loop)

  My VI is able to go through a series of speed reference points that lie in a sort of constant matrix. I have to be able to go through a series of hundreds of game points, and fill in the constant table whenever I have a new profile to test don't will not work.

  I tried to use a reading of block of spreadsheet and table of Index to read values from a worksheet, but when I run the program, it does not seem to read the values in the file.

  The path must be correct, but I don't know if there may be a problem of formatting with file worksheet regarding the delimiter. Or maybe not all the parameters are filled with reading block of spreadsheet.

  Anyway, any help with my problem would be appreciated. I'll give the VI as an attachment to this post. Nine set points which worked with the VI are in the constant blue table, which was previously set to where the entire Long block is now fixed.

  Brandon

  Hi Brandon,.

  That's right, I withdraw my previous response. I apologize to this topic.

  I noticed that in your code, you select the line at index 0 instead of the first column. When you use the table to Index out of the loop block, make sure that you select the column at index 0 so you can enter the first column in the input file. This should get you 1 d table you're looking for.

• I want to create a sequence of traffic lights in labview

  Hello

  I am very new to Labview (first post here) and am learning by trying simple things.

  I am trying to create a system of traffic lights in continuous operation, RED, THEN RED AND AMBER, and THEN JUST GREEN, THEN JUST AMBER, THEN JUST RED and repeat the sequence.

  I have 3 of the 3 colors LED and at the present time they run, RED, THEN RED AND YELLOW, THEN RED AND ORANGE AND GREEN, THEN ALL OFF, and then repeats the sequence.

  I used a structure of matter within a while loop.  Set a status for each of the colors and the reset (-all).  I think that straight forward.

  Does anyone have advice on how I could add to what I learned to create the aforementioned fire sequence?

  Thank you very much for your time.

  PJ.

  You have passed the exam, so I'll join the VI this time (LV9, let me know if you need an earlier version).  You'd be surprised how many people complain of not be provided code, glad to see that you're a good sport.

  The constant matrix in cluster was created by right-clicking the control and selecting create Constant.  He just let me show a screenshot of the content of the sequence table.

  I added the delay as a small tip to always think a go ahead.  Finally you will be much more forward thinking, but start by looking at the next thing you want to do and try to keep your code flexible enough to cope.

• position of the radio to the spell button

  I have a Radio Button control that is configured to allow no. selection and has 10 boxes representing each position of a switch. I use a Radio Button control because the switch position at most only one can be active at a time.

  I want to convert the selection to a hexadecimal value. For example, if the radio button1 is selected, the value is 0x1. If the 10 radio button is selected then 0x20.

  So far, I have the code to check if the control value Radio Button is 0 (no = no selection) or not. If there is a selection that I use a turn. Is there another way to do that is more effective?

  Create a constant matrix of your hex values (I guess just U8 with the hexadecimal value display, or whatever the type of data desired, string, etc.).

  The first element is "no selection" and so on.

  Now use "index Board" and wire to the terminal index radiobutton control. Wire the constant matrix in the input array.

  The release of "Board index" will be your desired value.

• I think that there is a bug in the function RT Set CPU pool assignments (SMP)

  I'm trying to configure Symmetric multi Processing on a PXI controller which has 2 CPUs.  I check the number of processors using RT get number of processors (it gives me 2).  I have a constant matrix of wire to the RT Set CPU pool allocations function and create an array of 2 elements with system and reserved as the two values (to assign a single processor for my timed loop and the other for "everything else").

  It works, which means it seems to do the assignment.  But if I look at the assignments of Pool Set CPU error line, it returns-2231, "invalid CPU pool settings. Each pool must contain at least 1 CPU. »

  I do not know what that means, or why I am getting the error (I might just "ignore it", but if the error is 'real', which is not supposed to do).  The entrance to the Pool Set CPU assignment is described in the documentation as "an array of enumerations, with an entry for each CPU.  For me, this means 2 entries, which is what I have.

  Does anyone have a rational explanation of what's going on?  Is this a bug?  The documentation is the problem?  I have attached the front (showing the number of processors and the error output) and the (very simple) block diagram.

  Bob Schor

  

  Thank you, Bobby.

  I reread carefully the Note help "Specifies the Set of processors available for automatic load balancing".  Now that I know the 'right answer', I can interpret what is written as planned, but it's not easy!

  It is also curious that, although the previous example has generated error-2231, if we deleted the error (or wired never error line), function has, in fact, affect the system and Timed Structures pool to CPU0 (I have a few 'real' testing code that shows CPU0 with Structures Timed cycles).  Given that the function "does the right thing" even if you specify parameters of 'bad', perhaps it should be treated as a warning, not an error (or otherwise make a mistake of 'real' not assigned to a pool - it also wouldn't hurt to have a less obscure the Error Message, or more explicit "be sure to have at least a CPU explicitly assigned to each system and Timed Structures pools") , maybe in "BOLD".

  This code has no error:

  

  Hereby I give you credit for the 'Solution', but I'll mark my answer as the Solution because it has a photo to help readers who are intrigued by the question and our responses.