Similar Questions

• 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.

• Features of the Matlab script node

  Comparing only the specific features that overlap of Matlab and Labview, is there an advantage for the latter to be able to run blocks in parallel? What exactly is the purpose of the Matlab script node in Labview?

  MathScript can be deployed on real-time hardware (if that is the question). I don't know about the others.

• 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.

• 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

• 2012 LabVIEW and Matlab script server error

  I just installed LV 2012 and upgrade the code that runs Matlab scripts. Now when I run it, it gives me an error of server script (1047). I'm using Matlab 2007. Someone at - it the same problem? Anyone know of a solution?

  I guess it has to do with the server script does not properly. But I can't exactly run the same code in LV 2011 without problem while LV 2012 gives me an error. Same computer, etc.

  Thanks in advance for any help you might be able to provide.

  Thank you "transfererror", this helped me identify workaround.

  For those who struggle with this, that's what I learned:

  1. This affects only the variables that are passed in a sub - VI in the connector pane (that is, local variables are not connected to the connector pane apparently do not have this problem).

  2. it seems to only affect as vectors 1 d or 2D paintings. The reason why the screws inserted by Sev_K example applies to this problem is that the types of data that are not arrays do not have this problem.

  3. Thus, to solve my problem, I inserted just an addition of 0 to all vectors and matrices that have been passed in the Sub - VI. I guess what it doesn't copy the variable in a local buffer and it is perhaps the reason why he fix it?

  In any case, workaround seems to work. I don't know what it costs in terms of speed or memory, but I do not have much about it for my application (some real-time applications that use Matlab scripts eventually consider it).

  Perhaps this information can help identify and fix this bug.

  Unique

• 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 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

• 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.

• Output of a Matlab script

  Hello everyone

  I work on a project for school and had a question regarding the output of a Matlab Script node. I have data that is stored in the form T(:,:,i) is 3D data which are calculated in the script.

  The main thing I want to do is output, so I can graph on a façade of Labview. I want to display an image in 2d with a third dimension represented as points on the 2d image. (2d space with the 3rd dimension in temperature).

  It would not make sense why I am doing this in Labview but I have a set built for Labview GUI and it is an extract of things I want to show. I included a file for special graphics, I am trying to show in the end.

  I'm sorry I am still learning the ropes of Labview.

  Hi Jakeyboy1,

  Here is a link that shows how to send a table to 3 dimensions of LabVIEW, but you should be able to easily change the schema in the article to go through the process.  In the article, the first table of auto-index 3D of the sample code to assign a T(:,:,i) within the script environment.  LabVIEW then uses another script node to deal with 3-Dimensional table built.

  You can enable this process.  Off the first script thread knot out the length of the 3rd dimension and which feed the Terminal N of a loop for.  In the place the script node loop that reads T(:,:,i) and outputs the 2D from the node table.  You can plug this on loop for and autoindexing should create the 3D chart in LabVIEW.  From terminal N is the length of the 3rd dimension.  The table resulting in LabVIEW must be identical.

  Send pictures to N dimensions in a MATLAB® Script node

• 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.

• 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

• 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.

• error 1050 with matlab script

  Hi, i ' v built a vi what sampling record and playback of audio files, I also added matlab script for data analysis.

  the script tested in matlab and matlab works great, when im trying to use it in labview, I get an error when running sciprt matlab. "Error with the help of griddedInterpolant... »

  I think the error takes place whe trying to run the command: "Sigitp = interp1 (clptv, clpsig, tv,"linear")"; "."

  Furthermore, I can not understand how to read the saved filed when the loop is complete.

  I don't know what the problem is.

  The vi are:

  

  I have also included the vi

  found how to get this working, the problem was with entry to the matlab script.

  

• Error signal processing VISA via MatLab script

  Hello

  I'm doing a simple acquisition of a VISA connected multimeter voltage feed voltage reading (it is a picture, but I only feed the frist for this example element, until I managed to make it work) and use a MatLab script with a build-in function to trace this tension. I get an error and I don't know why... Can anyone help?

  P.S. I know I can do this simply and easily everything in LabView, but as a result of specific class, I have to do interfacing between LabView and MatLab.

  Thank you all in advance!

  Records,

  G.

  Hey everyone, managed to fix it myself. Apparently need to sit and read the documentation on the MATLAB script more carefully. The function that I used was not recognized, I guess... or the MatLab server is not able to run it. However, I simply removed the function and the script automatically recognizes the values for the variables of interest, powered 4 from the LabView code.