Can I solve 3 nonlinear equations in LabWindows/CVI

I have 3 nonliear equations with 3 unknowns (x^2, y^2, and z^2) and get the roots?

There is no CVI function for finding nonlinear roots, but you can use any other C routine, e.g. the ones provided in the GNU Scientific Library

Similar Messages

How can I convert a project from LabWindows/CVI 2010 to a Visual Studio 2011 project?

I have a good sized project, 12 source files, 14 headers, 1 uir, that I want to be able to edit and compile in MS Visual Studio 2011, MSVC++.
I remember being told that LabWindows dropped support for C++ in 2008 and no longer had a wizard for converting projects. I know I can go the DLL route, but I have never created a DLL before and wouldn't know where to begin with it. What would be the best way to go about this conversion?
Solved!
Go to Solution.

CVI 2010 still supports the Visual Studio Conversion Wizard for Visual Studio 2005/2008. We do plan to add support for VS 2010 in a future release.
If you need a VS 2010 project now, you can use the Visual Studio 2008 conversion wizard, then upgrade the VS 2008 project to VS 2010.
National Instruments
Product Support Engineer

Solving nonlinear equation with VI

Hi,
I want to use LabView to solve a nonlinear equation. I read forums and figured out that I can use Nonlinear System Solver. vi and I noticed there are two options to write the equation: 1) F(X) is formula and 2) F(X) is VI. I could use the first option and write the equation with that but I did not understand how to use a sub-Vi to provide the equation. Would any one please tell me how to do that?
Thank you

Soran,
Read the detailed help for the solver VI.
The VI usually executes much faster than the formula parser/evaluator. Since solvers (and curve fitters, which have the same options) may need to evaluate the function many times while solving, that time can become significant.
In the help is a link to a template for the VI you need. You must use the exact connector pane and reference type. While you can create your own VI, it is much easier to use the template. On the block diagram create the code to generate your equation values in the configuration required by the solver. Be careful to put the parameters in the correcto order.
Lynn

Can I convert Labview panel to Labwindows/CVI uir file

I a project that I want to convert from labview to Labwindows\CVI.
I don't want to call my VI's from LabWindows.
It is possible to convert some Labview fronts panels to *.uir files (Labwindows/CVI)
Thanks

Hi Artus!
Unfortunately there is no automatic way to convert a LabView Front Panel into a Labwindows UIR.
The only way you can do this is by creating a new interface and adding all the elements that you need, but this way would actually mean rebuilding everything based on something you already have. Sorry about the bad news
I wish you the best day!
Oswald Branford

Can labview solve this equation?

Hello,
I need to solve this equation in labview to t. X and Y are known values.
And if this part can't be larger then 1. If it is, it should be made 1.
I have really no idea where to begin to solve this problem.
Thanks in advance!

If you are actually trying to solve it recursively, then Newton's Method should work.
Actually after checking it, it's obvious the that any value of t at the
input will give you the correct value of t at the output.
Message Edited by rpursley8 on 11-21-2005 12:09 PM
Randall Pursley

Can I create a merge module (.msm) in LabWindows/CVI 2010?

Is it possible to create .msm files in LabWindows/CVI 10? If so could someone just point me in right direction please? Thank you.
Solved!
Go to Solution.

You can't create merge modules in CVI but you can consume merge modules in our distribution builder. Normally, if you needed to create a merge module, you would create the merge module in a tool like WiX and then consume it in CVI. Just out of curiosity, what exactly are you trying to do?
Jonathan N.
National Instruments

Solving a system of nonlinear equations

Hey guys,
I am currently trying to solve a set of nonlinear equations in LabView with the help of MathScript and MATLAB code. I'm trying to create a working code since hours, but I haven't achieved this goal yet.
System of equations:
x^2 + y^2 + z^2 - R1^2 == 0
x^2 + (y-Y0)^2 + z^2 - R2^2 == 0
(x-X0)^2 + y^2 + z^2 - R3^2 == 0
R1, R2, R3, X0, Y0 are known.
Possible solution in MATLAB (assuming X0 = Y0 = 100, R1^2 = R3^2 = 11000, R2^2= 9000):
Create myfun.m with content:
function F = myfun(x);
F = [x(1)^2 + x(2)^2 + x(3)^2 - 11000;
x(1)^2 + (x(2)-100)^2 + x(3)^2 - 9000;
(x(1)-100)^2 + x(2)^2 + x(3)^2 - 11000];
end
Set intial value for iteration:
x0 = [50 50 50]
Solve:
fsolve(@myfun, x0)
=> Works fine!
Now I tried to just plug all of this stuff into a MathScript Node:
function F = myfun(x);
F = [x(1)^2 + x(2)^2 + x(3)^2 - 11000;
x(1)^2 + (x(2)-100)^2 + x(3)^2 - 9000;
(x(1)-100)^2 + x(2)^2 + x(3)^2 - 11000];
x0 = [50 50 50];
Sol = fsolve(@myfun, x0);
This is where the problem starts.
When I try to run the program, I get the follwing error message:
A function is defined in this script. You must save and call the
function with appropriate input values to execute the function.
I can't really figure out, what I did wrong and I would be very thankful, if somebody could help me.
Regards,
fuchrist
Solved!
Go to Solution.

Hi,
MathScript does not support inline user-defined function (UDF). What you need to do is
Define the UDF in a .m file. Give that .m file the same name as your UDF.
Save the .m file in MathScript Search Path. By default, the search path is the LabVIEW Data folder.
Pass the name of .m file as the first string input to function fsolve in MathScript Node.
I attach my .m file and snapshot of MathScript Node. The result I got is [50, 60, 70] which should be correct.
Attachments:
myfun.zip ‏1 KB

I used to working with Labwindow CVI and i would like to know how can i use the commands "loadpanel" and "Displaypanel " in Labview. Using Invoke Nodes?

I want to make another panel appears and runs, but i don´t want to use a subpanel. So, i would like to use somenthing similar to Loadpanel and Displaypanel, that you can use in Labwindows CVI, but in Labview, is ti possible?I hope your answers, thank you!!!

Hi Bichillo,
I posted an example here.
http://exchange.ni.com/servlet/ProcessRequest?RHIVEID=101&RPAGEID=137&HOID=50650000000500000014570100&HTHREAD=000087828&UCATEGORY_0=_49_%24_6_&UCATEGORY_S=0
It demonstrates how to do what you are asking.
I do not mind you laughing at the code.
Have fun!
Ben

Am unable to insert table and graphs into word document in labwindow/CVI? can any one help me ?

Am unable to insert table and graphs into word document in labwindow/CVI? can any one help me ?

Are you using the Word Report Generation instrument? You can find it in toolslib\activex\word\wordreport.fp under the CVI directory.
The instrument comes with a sample project that shows how to include table and graphs in a Word document: see samples\activex\word\wordrpt.cws in the samples foder of your CVI installation.
Proud to use LW/CVI from 3.1 on.
My contributions to the Developer Zone Community
If I have helped you, why not giving me a kudos?

How can I solve a system of linear equations for the non trivial solution?

I want to solve the equation A Q =0 where A is a 1xn matrix and Q is an nxn matrix for A. I tried using the Solve Linear Equations sub.vi but it just gave me the trivial solution. What can I do to solve this?

Larry of KochLab,
Have you looked at the MathScript Node? Would it be possible to post a simple example of what you are trying to do?
Ben Sisney
FlexRIO V&V Engineer
National Instruments

Where can I get Labwindows/CVI v4.0?

Hi,
I have been programming with Labwindows CVI at work for the past 4 years
and I would like to buy a legit copy for my home. I can get buy with 4.0
asopposed to 5.0 mainly because of price. Does anyone have a copy that
they don't need after upgrading to 5.0 ?
email me at [email protected]
Thanks,
Russ
Sent via Deja.com http://www.deja.com/
Before you buy.

Hi Russ,
What is the price you're looking to pay for CVI 4.0?
Because once you have CVI 4.0, you can upgrade to the Measurement Studio
Full
Development System (which has CVI 5.5 and other tools for Visual C++ and
Visual Basic)
for $295.
And this is a really good deal because if you want to buy the base package
of Measurement
Studio (which has CVI 5.5 as well) it's $995 and the Full System is $1995 !!
So you save big time by buying a cheap (hopefully) CVI 4.0 and then later on
you can upgrade
to CVI 5.5.
Just adding my two cents.
Azucena
wrote in message news:8dodr2$vvn$[email protected]..
> Hi,
>
> I have been programming with Labwindows CVI at work for the past 4 years
> and I would like to buy a legit copy for my home. I can get buy with 4.0
>
asopposed to 5.0 mainly because of price. Does anyone have a copy that
> they don't need after upgrading to 5.0 ?
>
> email me at [email protected]
>
> Thanks,
>
> Russ
>
>
> Sent via Deja.com http://www.deja.com/
> Before you buy.

I'm looking for examples of CAN control code with LabWindows CVI

I'm looking for examples of CAN control code with LabWindows CVI.

Hi,
The NI-CAN driver installs some examples for both the frame API and Channel API (NI-CAN 2.0).
The typical installation directory is:
C:\Program Files\National Instruments\MeasurementStudio\CVI\samples\nican.
It might change depending on where you installed CVI.
DiegoF

How can I read the PXI-Chassis-Type (LabWindows/CVI)?

How can I read the PXI-Chassis-Type?
I use in different test-stands different PXI/SCXI-Chassis for the same project. For example: Some test-stands have a PXI/SCXI-1052-Chassis, others have a PXI-1033 and a SCXI-1000 Chassis. Because I have to use different DIO-Ports (Ports 0.0, 0.1... are reserved for internal communication between the 1033 and the 1000-Chassis) I want to read the used devices.
I think one way is to use the registry-entries, but I'm not sure...
My current LabWindows/CVI- version is 8.5.1.
Thanks for your ideas!
Jagger_HKG

Hello Jagger_HKG,
you could use the NI System Configuration API.
Kind regards,
Robert H
NI Germany

Can Labwindows/CVI work with Opencv?

OpenCV is a good and free lib for computer vision developer. I know it's an option to use it through Measurement Studio and Visual studio. But, can we use it in the CVI environment directly?

OpenCV does work with LabWindows. If you successfully "installed" the latest openCV, which is at the time of my post version 2.4.3, the header file "core_c.h" along with corresponding lib and dll files must be added to you project tree in order to use openCV functions. "core_c.h" includes "types_c.h" which for some reason LabWindows/CVI doesn't really like. The problem starts on line 137:
#ifndef CV_INLINE
# if defined __cplusplus
#    define CV_INLINE inline
# elif (defined WIN32 || defined _WIN32 || defined WINCE) && !defined __GNUC__
#    define CV_INLINE __inline
# else
#    define CV_INLINE static
# endif
#endif /* CV_INLINE */
The only option CVI likes is the last one (CV_INLINE static), so simply modify this segment so that it's the only choice and compile!

Can not find imaqView3D function panel in labwindows/cvi!

followed what the on-line support told me (add the imaqView3D function declaration into my source code), it does not still work! So seek help from you! thanks so much!

David,
You will probably have a better chance of having your question answered if you posted your question to the Vision or LabWindows/CVI Developers Exchanges.
Regards,
Erin

Can I solve 3 nonlinear equations in LabWindows/CVI

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