HP 40GS systems of linear equation with parameters

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

  Hello

  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

  Arthur

  Hello

  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.

  Cyrille

• Systems of linear equations

  Hello

  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];

  ans.push(Term/a[Row][Last-Row-1]);

  }

  Return ans.reverse ();

  }

  }

  }

• 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 Fti.vi 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.

  -Jim

• Solve linear equations - Block tridiagonal matrix

  Hello

  I developed a vi that can be used to solve tridiagonal systems by block of equations by Thomas algorithm. These systems are usually in the finite differences method used to solve equations in partial derivatives.

  For iterations of 1000 times, its time is ~ 500ms. Now, I want to finish the work within 100ms. is possible to improve the performance?

  Thanks, Jong Hyun

  For details of the Thomas algorithm, please see wikipedia Web page, http://en.wikipedia.org/wiki/Thomas_algorithm. Note that it describes how to solve tridiagonal linear equations, but same logic can be applied to block tridiagonal equations.

  * If you use the vi sparse SLE of analysis multi-hearts and Sparse Matrix Toolkit, the elapsed time is 450 ms ~

  LabVIEW basic/full/pro all use Intel MKL library for linear algebra on MS Windows and Linux.  Intel MKL designed to be very fast for large matrices and breaking a problem given out to take advantage of the different levels of cache. Linear algebra calls go through several levels of functions, including size controls, if any, and may allocate memory for the workspace each call, before finally calculate the result.  This overload problem is evident when the matrix is so small (3 x 3).

  I coded matrix-matrix, versions multiply, matrix-vector multiply, and matrix opposite in the case of 3 x 3 explicitly in soil using the structure in place and full indexation (no loops, all scalar operations).  This eliminates the overhead of controls and allows better and placeness.  This brings your reference point down for ~ 70ms on my machine.  Unfortunately this requires significant code changes if you change the block size, but it provides good performance.

  "I think that, if I can save each submatrix conversely in the first round and use several times, then speed will be better."

  I agree.  You should be able to calculate the most sweeping toward the front of the algorithm and simply replace the submatrices changed and still solve before.  This may mean re - organize the variables to have the submatrices updated or modified down to the right of the input matrix.

  -Jim

• Installation of the SP3 for XP now crush the latest system updates or interfere with programs like IE 8?

  In all other ways my XP system is up-to-date, with the exception of SP3. I never needed before. SP1 and SP2 have been installed at the time when they were new. Now SP3 is required to upgrade to some new programs. Installation of the SP3 at this late date crush the latest system updates or interfere with programs like IE 8? I don't want that my system is back to older parameters which are now outdated. If the system settings are changed, how do I know those who?

  No, this does not disturb.

• System drive Qosmio G20 with an image or a clone backup

  On another thread, I asked problems with Acronis True Image to backup and cloning of my system (C) disk. Whenever I'm trying to clone my system disk or recover an image, I can create and restore the image, but when I install the player recreated and tries to start, I get as much "windows did not start successfully, I would like to start in safe mode... last good config known... or normal. All the options to return to the screen.

  I have two drives 100 GB sata, with the first disc of the op system, programs and the second with my data and therefore has set up the raid as two independent disks and the raid console option disabled.

  After trying another product of cloning with the same result, I guess there is something in the Qosmio implemented that is the cause. I read that Qosmio Player is installed on a hidden partition of Linux on the system drive and am wondering if it may not be picked up by the cloning and imaging software and that may cause boot failure.

  So I have two questions. First of all, nobody knows why I might be problems starting from a clone or recovery using third party disk image backup software and second, anyone successfully upward and restore a G20 Qosmio Player system, and if so with what software and do you perform all the special functions.

  Thank you very much.

  Hello

  Well, I use the Toshiba Recovery CD to restore the operating system on the Qosmio G20.
  It has also 2 x 100 GB, but under my computer, I saw only one a HARD drive. I created 2 partitions with the ghost (second option on the recovery CD).
  However, I have now 2 partitions but after this procedure, the Qosmio player has been removed. I though that I need to install again simply because of the Qosmio player but I tried to install the Qosmio player after the recovery procedure and it has been successfully.

  2 existing partitions and I also have a Qosmio player on my laptop.
  But one thing is very strange; I can't locate the partition in disk management.
  But everything works ok

• How to build an equation with variables

  I want to solve an equation below shows zero finder vi by the Newton Raphson:

  z a * b * c * exp(-z/a),.

  a, b, and c are variables

  I can build the equation with constant a, b, c, but how do I build it?

  Thank you very much!

  Use the number to the string functions in the palette of string with the antiderivative of string concatenation to create a formula with your values of a, b and c.  Read the detailed help for more information about limitations on the variable names carefully.  'z' is the only variable in your formula for the detector zero.  Example is LV2009.

  Lynn

• my system is not compatible with %p! ???

  Hello
  just bought sony vaio VGN - FW5 windows 7 Home Edition premium, 1 GB, ATI, 320 HD, 4 GB Ram, 2.53 processor and 16.4 "display, as you can see my laptop has high specifications and so I bought the large GTA theft auto IV, I was surprised when I received a message that my system is not compatible with %p! ??? What does that mean??? Please help me thanks

  No problem.

  Find the setup.exe on your disk, right-click, choose Properties, and then click the Compatibility tab.  Replace the XP SP2 compatibility.  Run the Setup.exe again and it should work for you.

• Non-linear equations

  Hello

  Is there a way to solve non-linear equations and find x and y of them using LabVIEW MathScript and MatLAB (do not have those on the PC lab)?

  Maybe someone has an example...

  

  Thank you.

  When I ran your VI, I got error-23023. When I go explain that error and I get ill start dimension. Error-23001 is a syntax error. In your second equation you sqrt (x ^ 2 - y ^ 2) while the equation in your initial post was a +, not a-.  Gives me a syntax error, but nonetheless find a zero.

  The reason for the error-23023 is that you have specified the start but not end. create a control for end and enter two values immediately find a zero to 1518.178612...

  Here is the VI I've used.  You may need to recreate a link to the reference to the function VI because it will be in a different location.

  Lynn

• Equation with dynamic variable

  Is it possible to use an equation with 2 or more variables, and to make one of these variables as output without changing the equation?

  Take the formula below, example:

  R=x/(0.28706/0.46153+x)*(101.325/P)

  As usual, by inserting the values of x and P, then the value of R will receive a response.

  But if only the value of R and x can be inserted, how the value of P to decide without changing the equation.

  The equation is used multiple times in the same VI. One to generate a part of a graph (Mollier diagram) and the other must be used to find the value of the point of intersection.

  I hope that my question is understandable.

  Thanks in advance

  sikat-

  You simply set the two formulas:

  R (x, P)

  P (x, R)

  and select the one according to the inputs and outcomes.

  N R should be reserved for cases where there is no analytical solution.

• Calling stored procedures with parameters with the database connectivity Toolkit

  Hi all

  I'm new to the forum and struggling to find a solution to a particular problem I have in this respect, using the LabVIEW Database Connectivity Toolkit on a project, I am currently working on my work.  I have a database in which I tables and stored procedures with parameters.  Some of these stored procedures have input, output and return parameters.

  I tried to follow this example, but to no avail: http://digital.ni.com/public.nsf/allkb/07FD130746083E0686257300006326C4?OpenDocument

  Such a stored procedure I am working on the implementation is named "dbo.getAllowablePNs", running "SELECT * from DeviceType" (DeviceType is the table).  In this case, it requires no input parameter, it has an output parameter that generates the table [cluster] and has a return parameter that returns an integer value (status code for execution) to show if an error occurred.  The DeviceType table has 3 columns; ID (PK, int not null), PN (nvarchar ((15), null) and NumMACAddresses (int, null).)  I have surpassed many examples and I talk to the support OR try to implement this and similar procedures stored in LabVIEW but have not been successful.  I am able to connect to the database with the VI of open connection without error, but spin in some confusion as a result of this step.  I then try to use the VI of parameter query create to call the stored procedure and set the parameters.  I guess I would then use the Set parameter value for each parameter that is connected to the entry of parameters on the previous query with parameters VI VI?  I am also having some confusion during and after these steps as well.  I would greatly appreciate advice or suggestions that anyone could have in this situation because I am not a SQL expert.  Also, I would be happy to provide more information that might be useful.

  Kind regards

  Jon

  Here's what I use to do this.  I think I had to change him create parameterized query VI for him to work.  There is a post on the forum about this somewhere.

  

• System has been infected with the cuaari.exe Virus. Impossible to delete.

  UNALE to remove hidden files

  I have system has been infected with a virus called cuaari.exe that one of the antivirus is not able to remove.
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  Hi Abhishek,

  ·         What is the antivirus installed on the computer program?

  ·         It is updated with the latest virus definitions?

  You can run the Microsoft to check security scanner for infection by the virus. Check out the following link.

  Microsoft Safety Scanner - free online tool for PC health and safety

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• Issue user account controls? message "resource loader cache not have loaded MUI entry" you try to run Norton System works on cd with UAC.

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  Hi David e. Sunderland

  Method 1
  When you are working on your computer and install a new program, the installation suddenly fails. Now, you're left with a partly installed program. You try to install the program again, but you're unsuccessful. Or, maybe you have problems trying to remove an old program because the installation files are damaged.

  Problems installing and uninstalling programs on Windows computers
  http://support.Microsoft.com/kb/2438651/

  Method 2
  You can try to install the program to boot.

  How to troubleshoot a problem by performing a clean boot in Windows Vista or in Windows 7
  http://support.Microsoft.com/kb/929135
  Note: follow step 7 of section of boot KB929135 to the computer in normal mode.

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  Run the Norton System Works as an administrator and check if it helps

  How to enable an application to run once with a full administrator access token in the UAC?
  http://Windows.Microsoft.com/en-us/Windows-Vista/how-do-I-allow-an-application-to-run-once-with-a-full-administrator-access-token-in-UAC

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  Thank you

  Hello

  Because the computer is located in a no start situation and you don't have the installation disc, it is best to contact the manufacturer for assistance.