Features of the Matlab script node

Similar Questions

• MATLAB script node error: 1046

  Hello world

  I now use Labview for data acquisition and want to use MATLAB
  function of node script to do the work of image processing.

  I have some problems get MATLAB script to function properly. The
  It is:

  Whenever I tried to run the program, Labview gave me the following
  error:

  "Error 1046: Labview does not initialize the script server, make sure that the server software is.
  installed. »

  However, MATLAB is installed in the PC. I think that the reason of
  This error is that I'm using a PC based campus University. I got into this PC MATLAB is a network
  versioned. (i.e.
  installed on the network server, but not in the local hard disk).

  Is that what I can do to work around this error?

  Kind regards
  Kent

  Hi hykwei,

  Unfortunately, it is not possible to obtain the MATLAB Script nodes to work
  LabVIEW under your current network configuration. So that the
  Node MATLAB Script to work properly, it takes that MATLAB is
  installed on the same machine as LabVIEW. This means that you will need
  either install MATLAB on the local computer on which you apply
  LabVIEW or you need install and use LabVIEW in the same
  Server computer where MATLAB is installed. Function of MATLAB
  feature, you may be able to make some sort of minimum installation on the
  local machine that adds MATLAB to your registry and program files list,
  but who sends you right to the copy of MATLAB on the network.
  However, I am not aware if it is still an option or how you could go
  on the implementation of this scheme, so if you are interested, I would contact with
  MATLAB for more on this topic.

  Kind regards

• LabVIEW 8.5 problems using strings with MATLAB Script node

  I am having some problems that seem to be a bug that I can not understand how to solve using strings in the MATLAB script node.

  I have two subVIs that make some calculations and both include a variable called "errortext" is a string. The two subVIs do their calculations using the MATLAB script node, so all the outputs are defined in the script node.

  The first sub - VI outputs that string and a number. The string is sent to an indicator on the front panel. The number is sent to the second Subvi which performs some calculations more and then returns another string of the same name to an indicator on the front panel. This second string is different from the first (error different two messages should appear).

  I did have problems with this in the past until this morning. This morning, it seems that two of these channels are now somehow mystically connected to each other. The second string repeat that what the first channel said despite the fact that the first string is not be linked to the Subvi where lives the second string. The only link between the two is a calculated value of double which went from #1 to the Subvi #2 Subvi.

  I tried many things: I tried to rename the strings so that they do not have the same name. Initially, he would not let me and gave me an error saying that the renowned string was a undefined variable (which is ridiculous). After removing and replacing things, I finally managed to do so I would change the name, but now it displays nothing at all and even more I think it might still display a completely different another string in my code!

  I also tried to remove the channel indicator and replace it. Yet once, it wouldn't let me initially. I would like to highlight, press DELETE and nothing. Finally after replacing all the subVIs with them, I was able to remove the flags, but this did not help the problem.

  Any idea for these problems pecular is greatly appreciated!

  I totally understand what you did, you were talking about variables in your fist post, and it was not clear if you were referring to a variable you have defined in the Matlab code, or you try to call a variable indicator/control, where is often seen on this forum (and who isn't). That said, the crux of The Matlab Script communicates with Matlab via ActiveX, and when you use a command window opens small. This is the workspace of Matlab environment. A variable that you define in a Matlab Script node will be visible in the other, even if it's in another VI (see attached for an example, figure). This is because the script nodes are running in the same environment space. It seems to me that if this is what is happening.

• Spend the MATLAB data types 'cell' between MATLAB script nodes in LabView?

  Hi all

  I need to pass a variable of data type of cell of a MATLAB script node in LabView to another, but the cell is not listed as a data type 'exit' in the script node.

  Is it possible to do without converting them into a 2D array?  Each column of my cell has a different number of lines...

  Thank you!

  Mike

  Too bad...

  Rather than use a typical LabView, I just say

  assignin ('basic', ' varname', varvalue ");

  in the first script and varname called from the second node to get my cell.

  Easy... duh leaving here if anyone has the same issue in the future.

• How to use table 1 d of waveform in the Matlab Script

  I use Lavbiew to make the classification of Vibration signal.

  The first problem I encountered is the form of incorrect data.

  The output signals are 1 d arrary of waveform. I don't know how to use the Matlab Script.

  is someone can help me with this?

  I really appreciate your help.

  Hey beauzhang,

  I hope that you are well today. It certainly seems that we lack in some problems with the different sources and data types of wells. LVM VI Express load you have emerged from a table of waveforms. So we would need to do a few things. First of all, we need to ignore the range of interests, and we must get the waveform data elements table.

  I have provided an example of how we can extract the waveform in position 0 of the table and then pass the array of data values to the script node Y. I have configured the entry of the data of a table 1 d Reals node (by adding an entry and then the right of entry and select choose data type.)

  If you are interested in getting the values Y and build the table like you did in the script, you need to implement a different subset of table and looping mechanism in LabVIEW code to move each item to the script individually. However, I would recommend working with the entry level instead.

  

  I hope this helps!

• Permission denied error when you use the Matlab script

  I have the following simple running a Matlab script in Labview.

  K = 5;
  Matrix = randn (4,4);
  matlab.io.saveVariablesToScript ('Parameters.m', {'K', 'Matrix'})

  the last command saves the variables 'K' and 'Matrix' in the m-settings file that I can then use to load the settings 'K' and 'Matrix' to a 'Control Design and Simulation Model'.

  When I run the now from Matlab everything works fine. When I run this LabVIEW so I get the following error:

  LabVIEW: An error has occurred during execution of the script. Error message from the server?: Error using matlab.io.saveVariablesToScript
  Parameters.m: Could not open the file: permission denied.

  I use Matlab 2015 and LAbview 2015 in a 64-bit windows computer 7.

  Any help would be really appreciated.

  For those who have the same permission denied errors, I found the solution.

  I had to specify the current working directory in the matlab script (this is the directory to which you saved your LAbview VI).

  For example, if you have saved your labview vi to C:\Example_Folder

  then you must add the following command in your matlab script node before the command that causes the error

  CD (' c:/Example_Folder')

  I hope this will help.

• How to disable the MATLAB command window when the Matlab Script

  Hi, is it possible to disable the MATLAB command window popup when the Matlab script? Thank you.

  Isn't fear. As soon as you close the window is closed by the ActiveX Server and your script will stop running. You can, of course, reduce by using the operating system. Under Windows, you can use the Utilities of Windows API, as provided for in one of the threads of research responses.

• Error 1050 trying to use load 'filename' in matlab script node

  Hello

  I get error 1050 when Labview is trying to load a text via the node of matlab script file.

  I have all ready checked for her on this forum and google but found nothing. I also did this: http://digital.ni.com/public.nsf/allkb/2B3FF46C8512C4F786256CF30071BE53 and tried to use dlmread and much more.

  The thing is that I need the node matlab script for reading a txt file that Labview made a chart with 1 single table, draw the it and export a jpg image. I can't really use the 'export picture' or 'get image' function for cause of Labview, I need the whole route chart (these functions only take a snapshot of it when they are run).

  It's my code I use:

  Data = Load ('file');

  VPP = (Data (1:2000,1));

  XSIZE = (1/2000);

  Plot (0.0005:0.0005:1 VPP);

  axis ([1 0 5 - 5]);

  print ('-images ', 'graph.jpg');

  The usual matlab load to load txt files and print to print the jpeg format. The code works in matlab, but not in labview

  And Yes, I use windows 7 and legal versions of matlab r2009b and Labview 2009

  Hehe, I thought about it

  Path must be converted to a string and skip the ' in the file.

  He worked

• labview MATLAB script prevents the execution of several times.

  I have a code for communication series in matlab, I want to use in labview for graphical interface easier and better design. for this I used the matlab script node in labview. It seems that labview continue executing the script of matlab, but I want to labview to execute only once.is he sort of to do?

  I don't see how that can occur if you run the VI in "continuous" mode

• Running MatLab script

  Hi guys!

  I use TestStand to connect a bunch of data and save them as binary files. When the test is finished, I would like to start a matlab script. For the moment I do it manually, just open MatLab and change the path used by the script to find the particular set of binaries to test.

  What I understand you can use MathScript with the basic package.

  I requires nothing more of Matlab open / running a script in the background at a time given in the test. Could it be done by using a system call and just passing the path as a parameter to a LabView VI?

  Any IDE for what is the best approach?

  Thank you for your time!

  Ah, I understand now. Yes, the basic edition doesn't have the Matlab script node. In this case, you can use Exec System to simply call the Matlab command line. Matlab documentation contains various switches to it.

• MatLab Script can work in multi-cores?

  Whe LabVIEW going through a 'Matlab Script' Matlab code, the part "Matlab Script" works in a single-threaded or multithreaded mode? It uses the ActiveX to communicate with Matlab, so I guess that's the only thread?

  I have a LabVIEW code that needs to call a ".m" file. I wonder if the execution of the program will be greatly improved if I convert the file ".m" in a .dll file to eliminate the need to activate the server Matlab a lot of time.

  You are right in your assumption that the MATLAB Script nodes are running single-threaded. A single script will be able to run at a time.

  You may be able to improve performance to build in a DLL, but you should test on your machine to know how much. I have not really thing this would be too great. A building in separate maybe dll code you can also improve performance by allowing for parallelism, you could call DLLs separated in different threads, I think.

  Another option would be to use the MathScript node - which allows for parallelization.

  MATLAB® is a registered trademark of The MathWorks, Inc.

• Dynamically import ".m" Matlab Script file

  I want to dynamically load a file of Matlab .m to the Matlab Script function in a VI.

  In other words, based on a path to a file ".m" (control of the FP), load the ".m" of the file in the Matlab Script, and then run it.

  Does anyone know how to do this?

  Hi RedSoxFanatic,

  It is not possible to do what you ask.  However, I see a couple of options that will give you the same behavior.

  1. If you have only a few files ".m" who will be called use you a structure dealing with those already loaded files.  The user can then choose which cases to run.

  2. you can have the Matlab Script node you particular ".m" file to run based on an entry (number maybe), but this also requires having a predefined list of your files ".m".

  Justin D.

• Help! How can I call the Matlab file with toolbox (matlab 7.1) in labview 8.6?

  Hello

  I developed a file matlab to optimize a system, it's Toolbox. Entries should be in Labview but also the outputs should be included in the labview graph.  The results include arrays. CVI is not installed. My labview is version 8.6. MATLAB is version 7.1.

  (1) is the version of labview and matlab questions in this problem?

  (2) what is the best solution? Matlab script? DLL? Active X?

  (3) if I could use matlab script, I define the type of each variables in labview, including those of the code?

  Thank you!

  Jessie

  Step 1: Learn patience. This forum provides no immediate technical assistance. It is composed mainly of volunteers, and most of us have full-time jobs.

  (1) is the version of labview and matlab questions in this problem?

  Not really.

  (2) what is the best solution? Matlab script? DLL? Active X?

  Any of these will work. If you want to use the script, then you must use the Matlab Script node. This allows you to enter the Matlab code directly in the node, or you can call scripts that you have on your file system. This method requires that you have MATLAB hand whole on the target computer. If you create a DLL Matlab, then you use the node library function call and call the DLL as any other DLL. This method simply requires that you have the Matlab Runtime on the target computer.  I assume when you say that you're referring to writing your own ActiveX ActiveX component?

  (3) if I could use matlab script, I define the type of each variables in labview, including those of the code?

  I don't know what you mean by defining each variable type. You need to create the entries and exits on the Script node Matlab, so you can pass data between LabVIEW and Matlab environment. The help of LabVIEW contains more information on the use of the Matlab Script node. There are also some examples with LabVIEW.

• How adaptive algorithm is being implemented through node matlab script?

  Hello

  IAM working on adaptive algorithm of rejection

  I want to make an adaptive algorithm in labview using Matlab script node, because I have the file matlab algorithm

  It is not directly convert in labview, so I want to make the adaptive algorithm in labview

  but the problem for implement the adaptive algorithm

  could someone a idea?

  Thank you

  Hey,.

  You just need to copy contained in the MATLAB script... node mfile then rest of the work is even with the other node in LabVIEW...

  It could be that useful...

  Concerning

  HS

• MathScript instability with large Matlab scripts? (Labview 8.5.1)

  Hello

  I the student of LabView 8.5.1 version and experiences a lot of instability when you use Mathscript in Labview (the Mathscript block or the Mathscript window), but only when it comes to the larger scripts. The Matlab script is about 250 lines long and 16 KB of size and in this framework, are seven large paintings (six 14 x 8, built at the beginning and a 1000 x 9 which is built in a loop for, so increases with each iteration until 1000 lines). I find that whenever I have modify the script in the Mathscript node or the Mathscript window will freeze and hang for at least 10 minutes, sometimes totally crashing Labview Labview. As I wrote the script in Matlab, I'll have to debug in Labview and know what commands in Matlab do not work in Mathscript/Labview, so it's obviously pretty infuriating to have the program regularly hang for 10 minutes at a time.

  The computer I use is a desktop Packard Bell 5 year with 768 MB of Ram (less 32 MB integrated graphics card), running XP Pro. The processor is an Intel Celeron 2.6 GHz. I appreciate this isn't the best specced machine ever, but at the time it was all I could afford!

  Is this common suspended a little problem with Labview and Mathscript file ".m" large, or is manipulation - this purely down to my old computer?

  Thank you much for the help.

  Hello

  The delay that you experience is a problem with the big scripts in MathScript.  The delay increases exponentially with the length of the script.  For this reason, we recommend disaggregation great scripts and files ".m" in rooms separated by about 40 lines.  On faster computers, you can find the acceptable period for up to 100 lines.

  Grant M.
  Staff software engineer | LabVIEW Math & Signal Processing | National Instruments