Resolution of a system of nonlinear equations

Hey guys,.
Currently, I am trying to solve a set of nonlinear equations in LabView with the help of MathScript and MATLAB code. I am trying to create a code of work for hours, but I have not yet reached this goal.

System of equations:

x ^ 2 + y ^ 2 + z ^ 2 - R1 ^ 2 == 0
x ^ 2 + (y - Y0) ^ 2 + z ^ 2 - R2 ^ 2 == 0
(x X_0) ^ 2 + y ^ 2 + z ^ 2 - R3 ^ 2 == 0

R1, R2, R3, X 0, Y0 are known.

A possible solution in MATLAB (assuming that X 0 = Y0 = 100, R1 ^ 2 = R3 ^ 2 = 11000, R2 ^ 2 = 9000):

Create myfun.m with the contents:
function F = myfun (x);
F = [x (1) ^ 2 + (2) x ^ 2 + x (3) ^ 2-11000;]
x (1) ^ 2 + (x 2-100) ^ 2 + (3) x ^ 2-9000;
(x 1-100) ^ 2 + x (2) ^ 2 + (3) x ^ 2-11000];

The initial value for iteration:
x 0 = [50 50 50]

fsolve (@myfun, x 0)

=> Works great!

Now, I tried all these stuff plug a MathScript node:

function F = myfun (x);
F = [x (1) ^ 2 + (2) x ^ 2 + x (3) ^ 2-11000;]
x (1) ^ 2 + (x 2-100) ^ 2 + (3) x ^ 2-9000;
(x 1-100) ^ 2 + x (2) ^ 2 + (3) x ^ 2-11000];

x 0 = [50 50 50];

Ground = fsolve (@myfun, x 0);

This is where the problem begins.

When I try to run the program, I get the following error message:

A function is defined in the present text. You must save and call
function with input values appropriate to run the function.

I can't really understand, what I did wrong and I would be very grateful if someone could help me.

Kind regards



MathScript does not support inline function defined by the user (UDF). What you need to do is

  1. Define the UDF in a ".m" file. Give this file the same name as your UDF ".m".

  2. Save the file ".m" MathScript search path. By default, the search path is the LabVIEW data folder.

  3. Pass the name of the file ".m" as the first string input to the fsolve function in the MathScript node.

I enclose my .m file and snapshot of the MathScript node. The result I got is [50, 60, 70] which must be correct.

Tags: NI Products

Similar Questions

  • non-linear system Solver more equations than unknowns

    Is it possible to solve a nonlinear system with more equations than unknowns in LabView. I do a triangulation and data from several sensors, so I'm able to write 6 equations in order to get the 3 coordinates (x, y, z) as a solution. In LabView, I was able only to solve a system of 3 equations with this 3 unknowns, but I would use the set of 6 equations in order to obtain a more accurate solution, given that some measures can be noisy.

    Thanks in advance

    You can use the non-linear curve code to solve this problem. Consider the following system:

    3XY + y - z = 12

    yx + x ^ 2 + z = 12

    x - y - z = - 2

    Arrange to get 0 right side. x, y and z are the paramneters to be in shape. The entrance to the curved Y non linear will be an array of three zeros. Initial settings will be an array of three values, for example [1 1 1]. An example is attached.


  • FIRST HP: Solving a system of linear equations with a parameter


    I know how to solve a system of linear equations by using a setting by hand but I don't know how to set up in the calculator.

    Can someone please help me solve the system of linear equations below with a 'p' on the first HP Calculator next parameter?

    2 x + 8z = 26

    4 x-4y-14z = - 38

    8 x - 4y + 2z = 14

    The answer to the above equations is:

    x = 13 - 4, =(45-15p)/2, z = p y p

    Thank you



    What you're trying to solve is not really a system of equation with a parameter, but you try to solve a set of 2 equations with 2 variables (x and y).

    The case solve command can do for you.

    According to the CASE, type:

    Solve ([(2*x+8*z) = 26,(4*x-4*y-14*z) = - 38,(8*x-4*y+2*z) = 14], [x, y])

    Come in

    and the calculator will return

    {[-4 * z + 13, 15/2 * z + 45/2]}

    which is what you want.


  • Satellite A200-236 - can not get optimal resolution of the system

    Hello readers,

    I just installed the new ati drivers on my laptop and I can't get the optimal resolution of the system. I installed the old toshiba drivers, but I still have problems with the resolution. Anyone know how I can get the optimal resolution of the system to 1200 x 800?

    Mike Brust

    On what resolution the laptop switches mode?

    Before installing the new drivers, you must remove the old driver, restart your computer and install the new drivers.

    Also, make sure that you have installed all Service Packs and patches for your operating system.

    In addition, you must use the graphics drivers from Toshiba. Other graphics drivers don t have a protection against overheating and in the worst case, the graphics card can overheat and be damaged.
    With the Toshiba drivers, you are always on the safe side.

  • Systems of linear equations


    Does anyone know if there is such AS classes or functions to solve systems of linear equations? On the form A * x = c. A is a square matrix, x is a vector of unknown, and c are constants.

    In other words, a system of equations with a number of well-known (1-5) and an equal number of equations.

    Here is an implementation of the elimination, Gaussian, that you can use.  There is no error checking included:

    package com.kglad {}

    public class Gaussian_Elimination {}

    public void solveF(a:Array):Array {}

    for (var pivotCol:int = 0; pivotCol<>

    a = pivotF(a,pivotCol);

    var factor: number;

    for (var row: int = pivotCol + 1; row)<>

    factor = a [row] [pivotCol];

    for (var _col:int = pivotCol; _col)<>

    a = [line] [_col] has [pivotCol] [_col] * factor;




    Return echelonF (a);


    private void pivotF(a:Array,pivotCol:int):Array {}

    var maxAbs:Number = 0;

    var maxRow:int;

    for (var row: int = 0; line)<>

    {if (Math.ABS (a [Row] [pivotCol]) > maxAbs)}

    maxRow = row.

    maxAbs = Math.abs (a [row] [pivotCol])



    pivotCol line swap with maxRow

    var tempA:Array = a [pivotCol];

    normalize the maxRow

    var number: max = a [maxRow] [pivotCol];

    for (var i: int = 0; i<>

    a [maxRow] [i] / = max;


    [pivotCol] = a [maxRow];

    a [maxRow] = tempA;

    return a;


    private void echelonF(a:Array):Array {}

    var years: Array = [];

    var last: int = a [0] .length-1;

    for (var row: int = 0; line)<>

    var term: Number = 0;

    for (var num:int = 0; num<>

    duration = [line] [last-num-1] * and [num];


    end += [line] [last];



    Return ans.reverse ();




  • Calibration system as a solution of nonlinear equations

    Nice day

    The challenge of the day is to provide a calibration for a release of the accelerometer, expressed as a binary value.

    I have an accelerometer whose operating range can be set (±2g, ±4g ±8g).  The accelerometer itself then generates a binary value to 16-bit resolution.  Therefore, only 2 ^ 16 value (0-65535) represents an acceleration value of which depends on the lines we have.

    So we make the asumption that the response is linear, which allows us to claim:

    Acceleration = scale x value binary + Offset

    I have three axes of a value of data, accelerometer A, B and C.  If I hold the stationary accelerometer, the only thing that I should be reading is acceleration due to gravity, g.  It makes me of the relationship

    (A) ^ 2 + (B) ^ 2 + (C) ^ 2 = g ^ 2

    Since then, in any direction, the magnitude of the combination of all the three readings of the acceleration must be the gravitational acceleration (and that shouldn't change little matter which side you happen be pointing the accelerometer).

    What gives me, then, is a non-linear relationship of 6 variables (scale factors three and three shifts). I should be able to take six measures in an arbitrary orientation that will give me six output values of each had.  Then I should be able to get out the scale factors and offsets for each accelerometer, either in terms of g or with respect to which, in my opinion, g is.

    So, my question is how can I get Labview to do this?  I see that there is a tool to solve linear equations, but I don't see one appropriate for the non-linear case.  I'm also very comfortable believing that I'm just missing it :-)

    Thank you!

    Since the help file detail to the nD nonlinear system

    Formula Variables VI analysis

    The formula analysis screws accept only the following variables:

    Note  These same variables to specify the description of the chain of the formula for the adjustment of non-linear curve VI.

    a, a0,..., a9

    b, b0,..., b9




    z, z0,..., z9

    For variable and function names, only lower-case letters are allowed. Screw interpret case as errors.

    1. I found this by opening the Panel before the nonlinear Solver VI when executing your VI. The error information said that there was a problem with the formula.

    2. I replaced the Scale__ and Offset__ variables with a0, a1, b0, b1, c0 and c1 in tables X and f (x).

    3. I have expanded the values start and end - 10 and 10.

    This seems to work much better. At least it runs.


  • HP 40GS systems of linear equation with parameters


    I'm in the learning curve of the HP 40GS - a very interesting tool.

    Is it possible to solve systems of equations with parameters, for example:

    A * X + Y = 2 * 12

    5 * X - 3 * A * Y = 5

    HP 50 g, this isn't a big deal, but with HP 40GS I don't have an idea so far.

    If this is not possible, it will be possible if I have a third equation (so 3 equations in 3 unknowns)?

    Thank you very much in advance,


    P.S.: So far, I feel very comfortable with the HP 40GS and menus!

    I am not a member of the HP Calculator development team - unfortunately!


    now, I found a way to calculate the systems of equations with symbolic coefficients:

    See the document: to page 346ff

    With the command 'linsolve', it is possible to calculate with more unknown than equations.

    I hope this helps anyone with the same or close problem.

    Have fun with your calculators and do not hesitate to write other ways of calculations.



  • Impossible to change the resolution after a system restore - please help

    This afternoon I had my PC freeze when using iTunes. I tried to restart but got major error messages. I had to use "System Restore" a number of times that to have the machine to restart a version blown upward my wallpaper - no cursor, icons or the ability to use the button start. I finally managed to get back to a point where I still once restored the system but still once stood breathtaking version of the background, however, this time with the slider control. When I right click on customize, it does not open for me to change the resolution.

    Can someone help me? I am desperate because it's in the middle of football records and I urgently need my PC in working condition.

    Fixed. Corrupt graphics card. Downloaded and installed new drivers.

  • System of differential equations to solve a model of BZ reaction


    I wrote this little code to visualize the oscillation of the BZ reaction. I expect to see the oscillation as in page 3 and 7 of the link below

    This work is done in Matlab, and I want to reproduce in Labview with the same settings. But so far I could not see the oscillation.

    Could someone body spot what is wrong with this code?

    See you soon,.


    I have noticed that but not had time yesterday to examine it. I've implemented their matlab scripts and it turns out that the constants they give; e, e' and q are in fact 10 ^-n, and not 10 ^ n. A typo in a student newspaper, how rare once I changed that I had the correct plot as shown here:

    Attached to the VI. It runs much more slowly than in Matlab, so be warned.

  • UI on Macbook Pro 2015 trolling in the native resolutions

    I have a really strange problem with my Macbook Pro 15 beginning 13 "retina. The user interface is a little laggy when I put any native resolution, that the system provides. For example, when I opened this page: , animations are visibly restless. But as soon as I put the resolution to a value of system supported (2048 x 1280 for example) some not all works well and that it should. Another weird thing - if I move a browser window of my laptop to an external monitor Full HD screen everything works well on this screen. But as soon as I drag this return, he is again choppy. GAL of the entire system, not only in the browser. Any of you encountered this problem? I tried everything I found on the internet, but nothing helped. It has the graphics card Intel Iris 6100, processor Intel i5 2.7 GHz and 8 GB of ram. He does this since I bought it.

    Hello romantu,

    Thank you for asking your question here in Apple Support communities. I understand that you are experiencing some lag with the entire computer. I am pleased to offer you things to try to isolate or fix it for you.

    As always, we want to ensure the data on your Mac is safe. You will need to use Time Machine to backup to an external hard drive. The recommendation is to use an external hard drive twice the size of your hard drive internal. Use this article to help make a backup: use Time Machine to back up or restore your Mac.

    Once you have a backup, you will want to check if the system latency occurs in safe mode and a test user. Safe mode will tell you if the problem is related to a startup item or plugins, and a test user will let you know if the problem is related to your account, or at the system level. It will be difficult in safe mode, because safe mode runs a little slower. It may look like he is also experiencing lag while is not. Test and try to see if the video is the same as it did before. Check if the problem goes away on the monitor full HD in safe mode. See this article for help to find out how to enter safe mode: try safe mode if your Mac does not start-up. There is a section called "If a problem does not occur in safe mode" you can work through the if the problem does not have the same or at all while you are starting up in safe mode.

    If you get through the safe mode article and still questions or if the problem also happens when starting in safe mode, you will want to check if the problem occurs to a test user. This article will help you do it. How to test a question in another account on your Mac user. There is a section called "If a problem occurs in account only one user" that leads to this article help: Mac OS x: how to solve a problem of software. You want to go through this article, if the problem occurs only in your main administrator user and not the test user.

    If the problem occurs in safe mode and test user, you'll want to reinstall OS X. Use this help article: How to reinstall OS X. See the section titled "If you reinstalled for other reasons.

    Thanks again and have a great rest of your day.

  • 12 "MB vs 15" 2010 MBP (version high resolution)

    I have just taken delivery of my new 12 "MB and I'm confused. It has significantly higher resolution than my MBP but yet I have less screen estate. I expect more real estate but with things being smaller. Please can someone put me out of my stupidity?

    A friend answered it for me and I'm extremely relieved!    Resolution of the system of preferences - poster - scale - more than space.  Now that I have a lot of real estate funds and my Macbook not surprisingly is just about perfect!  Perhaps a part of the text is a bit small, but I don't know I'll get used to it because I am almost back my MBP initially because I thought that the text was too low and too high screen resolution.

  • Solve this linear system HP50g

    Hi guys,.
    I am an engineer in electrical engineering and have to solve systems of linear equations on a regular basis, so that the functionality is very important for me. Everything works very well, 95% of the time but sometimes I meet systems that the HP50g doesn't seem to like. For example one below.

    I want to solve for x, y, z and one in terms of V

    V- 100000 x +is-100000 100000x= 0
    -250000is-V+ 100000x100000z= 0
    -250000z+ 100000one+ 100000y= 0
    a+ 100000-250000z= 0

    After these 4 equations is on the stack, I'm them in a vector by pushing {4} in the stack and then by pressing -> ARRY. Then I push the variables I want to solve for the battery, x, y, z and a and a vector of them. Then, I use LINSOLV to solve the system. However, when I do it this way, the calculator gives me an equation for x, an equation for y and 2 equations for z and no equation for s. I'm not sure what I'm doing wrong. Is there another way to do that would give me 4 equations, one for each variable I want to solve for in terms of V?

    If my method to solve linear equations is somehow confusing, I basically followed this video

    Thanks in advance.


    Do not know exactly how you typed, so I'm being explicit just for some b:


    (1) as an equation is entered, use ' '

    (2) it is preferable to use a comma to separate the real and imaginary parts

    (3) explicit use multiply

    If the entry will look like this:

    '(4,3*X) = (4.7)'

    For this simple equation and assuming that X is defined as an independent variable (reproduced by 'X' in the top middle of the screen), you can use SOLVEVX for this one: (No. 5 in S.SLV menu or F5 if you use soft-keys)

    with "_Approx" uncontrolled, the answer is:

    X = 7/3

    with "vabout" checked the answer is:

    X = (2.333333333,0) (although X is part of the imaginary number, it is himself a real number).

    Kind regards.

  • Building for all resolutions and the OS app

    Hi all

    a very strong issue for me: I want my application to support a lot of existing resolutions and operating systems, from 4.6 to 6.0. I know how to write this code, so my headache lies in another field - compatibility. Typical problems and pitfalls one may face? It's a way to write * secure * code that works both touch and non touch devices smoothly?

    Some APIs are available only in the newer versions, some are deprecated. For example, now I use "navigationClick" to manage both trackball and touch events, and it works fine. What other functions handle that you know will work for sure on touch and non touch devices?

    Yes, 4.6 and 4.7 + need to the different versions, not so much because of the new API, but because 4.7 devices set lower versions in a ugly compatibility mode.

    I have much experience with coding special touch features that I have them never required in my applications. I've implemented workaround found a colleague-based features:

    You can detect a touch device using canvas.

    public static final boolean IS_TOUCHDEVICE = new Canvas() {}
    protected void paint (Graphics graphics) {}
    }. hasPointerEvents().

    based on this value I double the size of some input fields, so people with sausage instead of fingers can manage the

    As there are a lot of resolutions and new devices bring even more I would never consider to create a version by resolution, it would never end!
    a possible solution would be to create an additional library that contains only the graphics for a resolution, but it depends on your application if saved space would be worth for the extra complexity (and the cost of the added support).

  • Screen resolutions possible for external monitors connected to a T60 with ATI Radeon X 1300


    at home, I have my Thinkpad T60 with ATI Radeon X 1300 graphics running in a docking station with an external monitor connected to the DVI. I plan to buy a new screen and I wonder who will take care of screen resolutions of my system. My favorite among the possible new monitors have a native resolution of 1680 x 1050 pixels. The ATI chipset will support this setting?

    A big thank you to anyone who displays some tips


    It supports dvi up to 1920 x 1200 resolution.

  • Display of high resolution - too small UI elements

    Just got a Toshiba KiraBook - one of the first Windows laptops with a display high-resolution "retina-type". It runs at a resolution of 2560 x 1440.  4.4 Lightroom works fine, but some UI elements are simply too small to this resolution is comfortable - even with my reading glasses on. I know that some type of support 'retina' has been added in LR 4.3 - for MacBook, at least. Not sure if this applies also to Windows? If so, is there a setting I need to change?

    My resolution of Windows system fonts is set to 165% - but it does not appear that LR uses this system across its interface setting. Any ideas?  Thank you...

    LR 4.4, Windows 8 Pro 64-bit.

    I'm not familiar with the operation in high resolution on Windows, but "Added support for Windows at 150% and 200% of resolution" was one of the new features on the list of the LR5 beta.

Maybe you are looking for

  • Maximum RAM for Pavilion dv7-6107ee, product number LS048EA

    Hey there ' All,. I currently have the OEM 8 GB RAM installed.  I run VMware Workstation 8 for a laboratory test on my laptop and I would really like to 16 GB of RAM, but it seems that I read a few places that this model is not expandable to 8 GB (wh

  • Satellite P500 - after update BIOS on the numeric keypad does not work anymore

    I just had a Satellite P500 and am running Windows 7. I downloaded all the latest drivers and updated the system BIOS to version 1.70 (from Toshiba support website). Now, my numeric keypad of the keyboard does not work. The NumLock light is on and wh

  • NOR-5133 slow measurement

    Try to measure a signal which will be pulsated all Ms. right now I'm measuring and triggering off a pulse generator to simulate this signal; the generator is pulsed near 1 kHz, so that's fine. I noticed how slowly the program worked, in order to find

  • HP envy 4522: hp envy 4522 does not connect to microsoft or hot spots of android

    Hi all I am struggling to understand why my printer could easily connect to my old Nokia hotspot (windows mobile 7) and connects ok with my girlfriends Iphone, but my new phone Microsoft Lumia 550 (10 Windows phone) and my Android (HTC desire 620 4.4

  • Printer HP Deskjet 3056A - how to cancel print jobs stored?

    When my HP 3056 A print, it's paper. Once I loaded paper, I decided to cancel the last print job incomplete but print different documents. However, the printer still prints the last time unfinished documents. How can I locate and cancel the unfinishe