Home > Error With > Error With Arpack Routine Dneupd# Error With Arpack Routine Dneupd

## c c Mode 2: A*x = lambda*M*x, M symmetric positive definite c ===> OP = inv[M]*A and B = M.

For scalar SIGMA, and when SIGMA **= 'SM',** 29 % B need only be symmetric (or Hermitian) positive semi-definite since it 30 % is not Cholesky factored as in the other c c\BeginLib c c\Routines called: c dnaupd ARPACK reverse communication interface routine. c ddot Level 1 BLAS that computes the dot product of two vectors. Watch lists Setting up watch lists allows you to be notified of updates made to postings selected by author, thread, or any search variable. this contact form

The operand is given in c WORKD(IPNTR(1)), the result must be put in WORKD(IPNTR(2)). c IPNTR(10): pointer to the imaginary part of the NCV RITZ values of c the original system. Tagging Messages can be tagged with a relevant label by any signed-in user. c ------------------------------------------------------------- c IPNTR(1): pointer to the current operand vector X in WORKD. internet

Learn more MATLAB and Simulink resources for Arduino, LEGO, and Raspberry Pi Learn more Discover what MATLAB® can do for your career. http://www.mathworks.com > >> 3 Apple Hill Drive Phone: (508) 647-7506 > >> Natick MA 01760-2098 Fax: (508) 647-7002 > >> ========================================= > >> > >> > >> > > > > The complex conjugate c pairs are kept together and the associated Ritz estimates are located in c WORKL(IPNTR(8)), WORKL(IPNTR(8)+1), ... , WORKL(IPNTR(8)+NCV-1).

**Penny. **c c NEV Integer. (INPUT) c Number of eigenvalues of OP to be computed. 0 < NEV < N-1. Thank you! c IPNTR(12): pointer to the NCV by NCV upper quasi-triangular c Schur matrix for H.

But what you get in our point releases is ready for general use. c = -9999: Could not build an Arnoldi factorization. This is equivalent to c restarting the iteration with a starting vector c that is a linear combination of approximate Schur c vectors associated with the "wanted" Ritz values. https://www.mathworks.com/matlabcentral/newsreader/view_thread/22886 As you can see, if it does not converge, it gives an error and stops all the experiment, loosing by that hours and hours of simulations.

c This represents the number of Ritz values that satisfy c the convergence criterion. c This routine is only used in residual calculation. nconv = iparam(5) do 30 j=1, nconv c c %---------------------------% c | Compute the residual norm | c | | c | || A*x - lambda*x || | c | | IDO will be set internally to c indicate the type of operation to be performed.

Many MATLAB user are on a subscription, meaning that you do get all the bug fixes as soon as they're ready. http://www.caam.rice.edu/software/ARPACK/UG/node137.html Author To add an author to your watch list, go to the author's profile page and click on the "Add this author to my watch list" link at the top of None c c\EndLib c----------------------------------------------------------------------- c c %-----------------------------% c | Define leading dimensions | c | for all arrays. | c | MAXN: Maximum dimension | c | of the A allowed. c If INFO .NE. 0, RESID contains the initial residual vector, c possibly from a previous run.

If TOL<=0, machine | c | precision is used. Use the Email Address of Your Choice The MATLAB Central Newsreader allows you to define an alternative email address as your posting address, avoiding clutter in your primary mailbox and reducing c NP WORKL(IPNTR(14)+NP-1) WORKL(IPNTR(14)+2*NP-1). c . .

The updated eigenvalue routines (ARPACK) were one of the reasons I recently upgraded from 5.3. The newsgroups are a worldwide forum that is open to everyone. How do I get all updates, patches, fixed m-files for R12. Apply Today MATLAB Academy On-demand access to MATLAB training.

c ------------------------------------------------------------- c ISHIFT = 0: the shifts are provided by the user via c reverse communication. The user should supply his/her | c | own matrix vector multiplication routine | c | and a linear system solver. c = 3: No shifts could be applied during a cycle of the c Implicitly restarted Arnoldi iteration.

Newsgroup content is distributed by servers hosted by various organizations on the Internet. Close × Select Your Country Choose your country to get translated content where available and see local events and offers. c Note: IPNTR(9:13) is only referenced by dneupd. c IDO = 3: compute the IPARAM(8) real and imaginary parts c of the shifts where INPTR(14) is the pointer c into WORKL for placing the shifts.

c = -5: WHICH must be one of 'LM', 'SM', 'LR', 'SR', 'LI', 'SI' c = -6: BMAT must be one of 'I' or 'G'. We recommend upgrading to the latest Safari, Google Chrome, or Firefox. c = -3: NCV-NEV >= 2 and less than or equal to N. Implicit restarting is ALWAYS used.

c ===> shift-and-invert mode (in real arithmetic) c If OP*x = amu*x, then c amu = 1/2i * [ 1/(lambda-sigma) - 1/(lambda-conjg(sigma)) ]. Terms Privacy Security Status Help You can't perform that action at this time. c c Note: IPNTR(9:13) is only referenced by dneupd. c 'SR' -> want the NEV eigenvalues of smallest real part.

If a basis for the invariant subspace corresponding to the converged Ritz c values is needed, the user must call dneupd immediately following c completion of dnaupd. Search To add search criteria to your watch list, search for the desired term in the search box. Suppose we want to solve A*x = lambda*B*x in inverse mode, c where A and B are derived from the finite element discretization c of the 1-dimensional convection-diffusion operator c (d^2u You can also select a location from the following list: Americas Canada (English) United States (English) Europe Belgium (English) Denmark (English) Deutschland (Deutsch) España (Español) Finland (English) France (Français) Ireland (English)

Related Content Join the 15-year community celebration. c c 4. http://www.mathworks.com >> 3 Apple Hill Drive Phone: (508) 647-7506 >> Natick MA 01760-2098 Fax: (508) 647-7002 >> ========================================= >> >> >> > > Subject: Matlab 6 / eigs From: Abe Kohen c c\Author c Richard Lehoucq c Danny Sorensen c Chao Yang c Dept.

of Computational & c Applied Mathematics c Rice University c Houston, Texas c c\SCCS Information: @(#) c FILE: ndrv4.F SID: 2.5 DATE OF SID: 10/17/00 RELEASE: 2 c c\Remarks c 1. c This will indicate how many Arnoldi vectors are generated c at each iteration.

© Copyright 2017 idearage.com. All rights reserved.