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From: Rafael Vazquez <vazquez@im...>  20141105 13:42:25

Dear GeoPDEs users, a new version of GeoPDEs has been released. The new version fixes some known bugs when using GeoPDEs in Octave 3.8. It also includes some new features and examples, developed by different users: * Advectiondiffusion with SUPG stabilization (thanks to Anna Tagliabue and Luca Dede). * 2D examples for bilaplacian and Kirchhoff plates (thanks to Marco Pingaro). * Nitsche's method for imposing tangential boundary conditions with 2D divconforming elements (thanks to Adriano Cortes). * Two new multipatch geometries: a sphere and the Tesla cavity (thanks to Jacopo Corno, see also the report http://mox.polimi.it/it/progetti/pubblicazioni/quaderni/312014.pdf) The release also contains the latest version of the NURBS toolbox, which includes a new function (nrbmultipatch) to compute automatically the interface information for multipatch geometries. Used along with nrbexport, this function should make things much easier when generating a geometry from multiple patches. Finally, to improve the documentation, we have included in the release a beamer presentation about GeoPDEs and the NURBS toolbox. We hope you find that useful. As usual, feel free to send your messages to the mailing list with your questions and comments. Best regards, Rafa 
From: Rafael Vazquez <vazquez@im...>  20141009 07:38:00

Hi Carly, for a nurbs geometry, you can see the mesh with the command nrbkntplot. For instance, in the example case, nrbkntplot(geometry.nurbs). Unfortunately, Paraview does not support the visualization of nurbs geometries. The wireframe you will see in Paraview does not correspond to the real mesh, but to an artificial grid that we use for plotting. Regards, Rafa On 08/10/2014 17:07, Carly Gao wrote: > Hi, > > I am wondering how to plot the mesh. I am running the example case > "ex_article_15lines". I want to see the mesh plot for this case. Or do I > need to see this information in Paraview? Thanks. > > Regards, > > Carly >  > Meet PCI DSS 3.0 Compliance Requirements with EventLog Analyzer > Achieve PCI DSS 3.0 Compliant Status with Outofthebox PCI DSS Reports > Are you AuditReady for PCI DSS 3.0 Compliance? Download White paper > Comply to PCI DSS 3.0 Requirement 10 and 11.5 with EventLog Analyzer > http://pubads.g.doubleclick.net/gampad/clk?id=154622311&iu=/4140/ostg.clktrk > _______________________________________________ > Geopdesusers mailing list > Geopdesusers@... > https://lists.sourceforge.net/lists/listinfo/geopdesusers 
From: Carly Gao <carlygao@gm...>  20141008 15:07:29

Hi, I am wondering how to plot the mesh. I am running the example case "ex_article_15lines". I want to see the mesh plot for this case. Or do I need to see this information in Paraview? Thanks. Regards, Carly 
From: Rafael Vazquez <vazquez@im...>  20141003 11:19:56

Hi Carly, you have to add to the path the geopdes_base folder with all its subfolders. In your case, it can be done with the command: addpath (genpath ('C:\Program Files\MATLAB\R2013b\toolbox\geopdes_base\inst')) Regards, Rafa On 29/09/2014 18:05, Carly Gao wrote: > HI, > > I want to run an example in the folder "C:\Program > Files\MATLAB\R2013b\toolbox\geopdes_base\inst\examples". I have the > following error. It looks all example will not find the function > "geo_load". Can any one give me some guidance about how to run an example > case? Thanks. > > >>> ex_article_15lines > Undefined function 'geo_load' for input arguments of type > 'char'. > > Error in ex_article_15lines (line 32) > geometry = geo_load ('ring_refined.mat'); > > Regards, > > Carly >  > Meet PCI DSS 3.0 Compliance Requirements with EventLog Analyzer > Achieve PCI DSS 3.0 Compliant Status with Outofthebox PCI DSS Reports > Are you AuditReady for PCI DSS 3.0 Compliance? Download White paper > Comply to PCI DSS 3.0 Requirement 10 and 11.5 with EventLog Analyzer > http://pubads.g.doubleclick.net/gampad/clk?id=154622311&iu=/4140/ostg.clktrk > _______________________________________________ > Geopdesusers mailing list > Geopdesusers@... > https://lists.sourceforge.net/lists/listinfo/geopdesusers 
From: Carly Gao <carlygao@gm...>  20140929 16:05:47

HI, I want to run an example in the folder "C:\Program Files\MATLAB\R2013b\toolbox\geopdes_base\inst\examples". I have the following error. It looks all example will not find the function "geo_load". Can any one give me some guidance about how to run an example case? Thanks. >> ex_article_15lines Undefined function 'geo_load' for input arguments of type 'char'. Error in ex_article_15lines (line 32) geometry = geo_load ('ring_refined.mat'); Regards, Carly 
From: Rafael Vazquez <vazquez@im...>  20140925 09:09:14

Hi Carly, it seems to me that you do not have the permission to write in that folder. You can try to open Matlab as the administrator, or save the files in a different location. Regards, Rafa 
From: Carly Gao <carlygao@gm...>  20140924 21:25:56

Hi, I try to compile nurbsmex files using Matlab. The error is as follows. Thanks. >> compile LINK : fatal error LNK1104: cannot open file 'bspeval.mexw64' C:\PROGRA~1\MATLAB\R2013B\BIN\MEX.PL: Error: Link of 'bspeval.mexw64' failed. Unable to complete successfully. Error in compile (line 2) mex bspeval.c basisfun.c findspan.c mexmat.c 
From: Rafael Vazquez <vazquez@im...>  20140924 11:29:55

Dear Carly, if I remember correctly, the package was compiled using Octave 3.6.2. You need to install precisely that version of Octave to make it work. If you prefer not to reinstall Octave, you can use cygwin for installing the packages (the standard version, not the mingw file). I don't have any experience with cygwin, but maybe someone in the mailing list can help you with that. Hope this helps, Rafa On 24/09/2014 00:50, Carly Gao wrote: > Hi, > > I can't install geopdes_base2.0.3mingw.tar.gz. My error information is as > follows. I tried to use method 1 and 2. Neither one of them runs well. > Thanks. > > > > octave3.6.1.exe:8> pkg install geopdes_base2.0.3mingw.tar.gz > warning: load_path: > c:\octavepackages\geopdes_base2.0.3\i686pcmingw32apiv4 > 8+: No such file or directory > warning: load_path: c:\octavepackages\geopdes_base2.0.3/examples: No such > file > or directory > warning: load_path: > c:\octavepackages\geopdes_base2.0.3/examples/data_files: N > o such file or directory > warning: load_path: > c:\octavepackages\geopdes_base2.0.3/examples/geometry_file > s: No such file or directory > warning: load_path: c:\octavepackages\geopdes_base2.0.3/geometry: No such > file > or directory > warning: load_path: c:\octavepackages\geopdes_base2.0.3/utils: No such > file or > directory > warning: load_path: c:\octavepackages\geopdes_base2.0.3/msh: No such file > or d > irectory > warning: load_path: c:\octavepackages\geopdes_base2.0.3/operators: No > such fil > e or directory > warning: load_path: c:\octavepackages\geopdes_base2.0.3/solve: No such > file or > directory > warning: load_path: c:\octavepackages\geopdes_base2.0.3/space: No such > file or > directory > could not find library or dependents: > c:\octavepackages\geopdes_base2.0.3\i686 > pcmingw32apiv48+\op_f_v.oct > error: called from `gen_doc_cache>create_cache' in file C:\Program Files > (x86)\O > ctave3.6.1\share\octave\3.6.1\m\help\gen_doc_cache.m near line 94, column > 17 > error: called from: > error: C:\Program Files (x86)\Octave3.6.1\share\octave\3.6.1\m\pkg\pkg.m > at l > ine 869, column 5 > error: C:\Program Files (x86)\Octave3.6.1\share\octave\3.6.1\m\pkg\pkg.m > at l > ine 383, column 9 > octave3.6.1.exe:8> pkg install geopdes_base2.0.3mingw.tar.gz >  > Meet PCI DSS 3.0 Compliance Requirements with EventLog Analyzer > Achieve PCI DSS 3.0 Compliant Status with Outofthebox PCI DSS Reports > Are you AuditReady for PCI DSS 3.0 Compliance? Download White paper > Comply to PCI DSS 3.0 Requirement 10 and 11.5 with EventLog Analyzer > http://pubads.g.doubleclick.net/gampad/clk?id=154622311&iu=/4140/ostg.clktrk > _______________________________________________ > Geopdesusers mailing list > Geopdesusers@... > https://lists.sourceforge.net/lists/listinfo/geopdesusers 
From: Carly Gao <carlygao@gm...>  20140923 22:51:04

Hi, I can't install geopdes_base2.0.3mingw.tar.gz. My error information is as follows. I tried to use method 1 and 2. Neither one of them runs well. Thanks. octave3.6.1.exe:8> pkg install geopdes_base2.0.3mingw.tar.gz warning: load_path: c:\octavepackages\geopdes_base2.0.3\i686pcmingw32apiv4 8+: No such file or directory warning: load_path: c:\octavepackages\geopdes_base2.0.3/examples: No such file or directory warning: load_path: c:\octavepackages\geopdes_base2.0.3/examples/data_files: N o such file or directory warning: load_path: c:\octavepackages\geopdes_base2.0.3/examples/geometry_file s: No such file or directory warning: load_path: c:\octavepackages\geopdes_base2.0.3/geometry: No such file or directory warning: load_path: c:\octavepackages\geopdes_base2.0.3/utils: No such file or directory warning: load_path: c:\octavepackages\geopdes_base2.0.3/msh: No such file or d irectory warning: load_path: c:\octavepackages\geopdes_base2.0.3/operators: No such fil e or directory warning: load_path: c:\octavepackages\geopdes_base2.0.3/solve: No such file or directory warning: load_path: c:\octavepackages\geopdes_base2.0.3/space: No such file or directory could not find library or dependents: c:\octavepackages\geopdes_base2.0.3\i686 pcmingw32apiv48+\op_f_v.oct error: called from `gen_doc_cache>create_cache' in file C:\Program Files (x86)\O ctave3.6.1\share\octave\3.6.1\m\help\gen_doc_cache.m near line 94, column 17 error: called from: error: C:\Program Files (x86)\Octave3.6.1\share\octave\3.6.1\m\pkg\pkg.m at l ine 869, column 5 error: C:\Program Files (x86)\Octave3.6.1\share\octave\3.6.1\m\pkg\pkg.m at l ine 383, column 9 octave3.6.1.exe:8> pkg install geopdes_base2.0.3mingw.tar.gz 
From: Rafael Vázquez <vazquez@im...>  20140607 15:13:08

Dear Andrea, you need to update the function sp_nurbs_2d, that you can find in the repository: http://sourceforge.net/p/geopdes/code/HEAD/tree/trunk/ I'll try to make a release soon to fix these small bugs. Regards, Rafa > > > Dear GEOPDEs Authors, > > I'm trying to use GEOPDEs to solve the Bilaplace problem in the square. > I have a problem with the boundary conditions in > "solve_bilaplace_2d_iso.m". > The code of the example : > > % EX_BILAPLACE_ISO_SQUARE: solve the Bilaplace problem in the square, > discretized with NURBS (isoparametric approach). > > % The function solves the bilaplacian problem > % > % laplace( epsilon(x) laplace(u)) = f in Omega = F((0,1)^2) > % du/dn = 0 on Gamma_D > % u = 0 on Gamma_D > % > % with a variational formulation based on the Laplacian, that is, > % > % (epsilon laplace(u), laplace(v)) = (f,v) > % > > % 1) PHYSICAL DATA OF THE PROBLEM > clear problem_data > % Physical domain, defined as NURBS map given in a text file > problem_data.geo_name = 'geo_square.txt'; > > % Type of boundary conditions for each side of the domain > problem_data.nmnn_sides = []; > problem_data.drchlt_sides = [1 2 3 4]; > > % Physical parameters(c=epsilon) > problem_data.c_diff = @(x, y) ones(size(x)); > > % Source and boundary terms > problem_data.f = @(x, y) > 4*(pi^4)*(cos(2.*pi.*x)2*cos(2.*pi.*(xy))+cos(2.*pi.*y)2*cos(2.*pi.*(x+y))); > > problem_data.h = @(x, y, ind) zeros (size (x)); > > > % Exact solution (optional) > problem_data.uex = @(x, y) (sin(pi.*x).^2).*(sin(pi.*y).^2); > problem_data.graduex = @(x, y) cat (1, ... > reshape (2*sin(pi.*x).*pi.*cos(pi.*x).*(sin(pi.*y).^2), > [1, size(x)]), ... > reshape (2*(sin(pi.*x).^2).*pi.*cos(pi.*y).*sin(pi.*y), > [1, size(x)])); > > > % 2) CHOICE OF THE DISCRETIZATION PARAMETERS > clear method_data > method_data.degree = [3 3]; % Degree of the splines > method_data.regularity = [2 2]; % Regularity of the splines > method_data.nsub = [20 20]; % Number of subdivisions > method_data.nquad = [6 6]; % Points for the Gaussian quadrature > rule > > % 3) CALL TO THE SOLVER > [geometry, msh, space, u] = solve_bilaplace_2d_iso (problem_data, > method_data); > > > > % 4) POSTPROCESSING > % 4.1) EXPORT TO PARAVIEW > > output_file = 'Squarebilaplace_NRB_Deg3_Reg2_Sub9_1'; > > vtk_pts = {linspace(0, 1, 20), linspace(0, 1, 20)}; > fprintf ('The result is saved in the file %s \n \n', output_file); > sp_to_vtk (u, space, geometry, vtk_pts, output_file, 'u') > > % 4.2) PLOT IN MATLAB. COMPARISON WITH THE EXACT SOLUTION > > [eu, F] = sp_eval (u, space, geometry, vtk_pts); > [X, Y] = deal (squeeze(F(1,:,:)), squeeze(F(2,:,:))); > subplot (1,2,1) > surf (X, Y, eu) > title ('Numerical solution'), axis tight > subplot (1,2,2) > surf (X, Y, problem_data.uex (X,Y)) > title ('Exact solution'), axis tight > > % Display errors of the computed solution in the L2 and H1 norm > [error_h1, error_l2] = ... > sp_h1_error (space, msh, u, problem_data.uex, > problem_data.graduex) > > Evaluating the code, I get the following error message: > > Error using subsref > Reference to nonexistent field 'adjacent_dofs'. > > Error in sp_nurbs_2d/subsref (line 3) > value = builtin ('subsref', obj, S); > > Error in solve_bilaplace_2d_iso (line 100) > drchlt_dofs_r = union (drchlt_dofs_r, > space.boundary(iside).adjacent_dofs); > > > How can I resolve this problem? > > Thank you, > > Andrea Giorgini > > > >  > Learn Graph Databases  Download FREE O'Reilly Book > "Graph Databases" is the definitive new guide to graph databases and their > applications. Written by three acclaimed leaders in the field, > this first edition is now available. Download your free book today! > http://p.sf.net/sfu/NeoTech > _______________________________________________ > Geopdesusers mailing list > Geopdesusers@... > https://lists.sourceforge.net/lists/listinfo/geopdesusers > 
From: Andrea Giorgini <andrea.giorgini@ma...>  20140607 09:29:05

Dear GEOPDEs Authors, I'm trying to use GEOPDEs to solve the Bilaplace problem in the square. I have a problem with the boundary conditions in "solve_bilaplace_2d_iso.m". The code of the example : % EX_BILAPLACE_ISO_SQUARE: solve the Bilaplace problem in the square, discretized with NURBS (isoparametric approach). % The function solves the bilaplacian problem % % laplace( epsilon(x) laplace(u)) = f in Omega = F((0,1)^2) % du/dn = 0 on Gamma_D % u = 0 on Gamma_D % % with a variational formulation based on the Laplacian, that is, % % (epsilon laplace(u), laplace(v)) = (f,v) % % 1) PHYSICAL DATA OF THE PROBLEM clear problem_data % Physical domain, defined as NURBS map given in a text file problem_data.geo_name = 'geo_square.txt'; % Type of boundary conditions for each side of the domain problem_data.nmnn_sides = []; problem_data.drchlt_sides = [1 2 3 4]; % Physical parameters(c=epsilon) problem_data.c_diff = @(x, y) ones(size(x)); % Source and boundary terms problem_data.f = @(x, y) 4*(pi^4)*(cos(2.*pi.*x)2*cos(2.*pi.*(xy))+cos(2.*pi.*y)2*cos(2.*pi.*(x+y))); problem_data.h = @(x, y, ind) zeros (size (x)); % Exact solution (optional) problem_data.uex = @(x, y) (sin(pi.*x).^2).*(sin(pi.*y).^2); problem_data.graduex = @(x, y) cat (1, ... reshape (2*sin(pi.*x).*pi.*cos(pi.*x).*(sin(pi.*y).^2), [1, size(x)]), ... reshape (2*(sin(pi.*x).^2).*pi.*cos(pi.*y).*sin(pi.*y), [1, size(x)])); % 2) CHOICE OF THE DISCRETIZATION PARAMETERS clear method_data method_data.degree = [3 3]; % Degree of the splines method_data.regularity = [2 2]; % Regularity of the splines method_data.nsub = [20 20]; % Number of subdivisions method_data.nquad = [6 6]; % Points for the Gaussian quadrature rule % 3) CALL TO THE SOLVER [geometry, msh, space, u] = solve_bilaplace_2d_iso (problem_data, method_data); % 4) POSTPROCESSING % 4.1) EXPORT TO PARAVIEW output_file = 'Squarebilaplace_NRB_Deg3_Reg2_Sub9_1'; vtk_pts = {linspace(0, 1, 20), linspace(0, 1, 20)}; fprintf ('The result is saved in the file %s \n \n', output_file); sp_to_vtk (u, space, geometry, vtk_pts, output_file, 'u') % 4.2) PLOT IN MATLAB. COMPARISON WITH THE EXACT SOLUTION [eu, F] = sp_eval (u, space, geometry, vtk_pts); [X, Y] = deal (squeeze(F(1,:,:)), squeeze(F(2,:,:))); subplot (1,2,1) surf (X, Y, eu) title ('Numerical solution'), axis tight subplot (1,2,2) surf (X, Y, problem_data.uex (X,Y)) title ('Exact solution'), axis tight % Display errors of the computed solution in the L2 and H1 norm [error_h1, error_l2] = ... sp_h1_error (space, msh, u, problem_data.uex, problem_data.graduex) Evaluating the code, I get the following error message: Error using subsref Reference to nonexistent field 'adjacent_dofs'. Error in sp_nurbs_2d/subsref (line 3) value = builtin ('subsref', obj, S); Error in solve_bilaplace_2d_iso (line 100) drchlt_dofs_r = union (drchlt_dofs_r, space.boundary(iside).adjacent_dofs); How can I resolve this problem? Thank you, Andrea Giorgini 
From: Rafael Vazquez <vazquez@im...>  20140530 08:24:24

Dear Rahul, I really don't see the point on solving the discrete problem without using matlab (or octave, which is free), but if you want to do it, you can compute the equation of the piecewise polynomials using the CoxDe Boor formula, and then compute the integrals by hand to get the stiffness matrix and the righthand side. You can even use symbolic computations for those. Regards, Rafa Il 27/05/2014 10:40, rahul yadav ha scritto: > can anyone guide me to solve a problem using isogeometric analysis > theoretically without using matlab. The problem is > (d^2u/dx^2)u+x^2=0 for 0<x<1 > boundary condition u(0)=0, u(1)=0 > I want to solve it using quadratic NURBS with knot vector [0 0 0 0.25 0.5 > 0.75 1 1 1]. >  > The best possible search technologies are now affordable for all companies. > Download your FREE open source Enterprise Search Engine today! > Our experts will assist you in its installation for $59/mo, no commitment. > Test it for FREE on our Cloud platform anytime! > http://pubads.g.doubleclick.net/gampad/clk?id=145328191&iu=/4140/ostg.clktrk > _______________________________________________ > Geopdesusers mailing list > Geopdesusers@... > https://lists.sourceforge.net/lists/listinfo/geopdesusers 
From: rahul yadav <rahulyadav1002@gm...>  20140527 08:40:18

can anyone guide me to solve a problem using isogeometric analysis theoretically without using matlab. The problem is (d^2u/dx^2)u+x^2=0 for 0<x<1 boundary condition u(0)=0, u(1)=0 I want to solve it using quadratic NURBS with knot vector [0 0 0 0.25 0.5 0.75 1 1 1]. 
From: Rafael Vázquez <vazquez@im...>  20131221 23:56:55

Dear Naim, I'm sorry, but I have not used Rhino for a long time, and I don't remember how it was done. Maybe some other user can help you with this. Regards, Rafa > Hello, > > I am using Rhino autodesk tspline plugin. Can you please tell me how to > set > the boundary nodes in Rhino so that I can use the file file for analysis > creating iga extension file. > > Thanks in advance. > > Best regards, > Naim > > > > > >  > Md.Naim Hossain > Research fellow > inuTech GmbH > Nuremberg, Germany. > Phone:+4917687963582 >  > Rapidly troubleshoot problems before they affect your business. Most IT > organizations don't have a clear picture of how application performance > affects their revenue. With AppDynamics, you get 100% visibility into your > Java,.NET, & PHP application. Start your 15day FREE TRIAL of AppDynamics > Pro! > http://pubads.g.doubleclick.net/gampad/clk?id=84349831&iu=/4140/ostg.clktrk > _______________________________________________ > Geopdesusers mailing list > Geopdesusers@... > https://lists.sourceforge.net/lists/listinfo/geopdesusers > 
From: Md Naim Hossain <md.naimhossain11@gm...>  20131219 14:49:49

Hello, I am using Rhino autodesk tspline plugin. Can you please tell me how to set the boundary nodes in Rhino so that I can use the file file for analysis creating iga extension file. Thanks in advance. Best regards, Naim  Md.Naim Hossain Research fellow inuTech GmbH Nuremberg, Germany. Phone:+4917687963582 
From: Rafael Vazquez <vazquez@im...>  20131205 12:35:32

Dear Naim, at this moment the only possibility for local refinement in GeoPDEs is to use the Bezier extraction files from the Tsplines plugin for Rhino. There is nothing for PHTsplines. Best regards, Rafa Il 05/12/2013 11:39, Md Naim Hossain ha scritto: > Hi, > > Is there anything so far developed with PHT(polynomial spline over > hierarchical tmeshes) spline based isogeometric analysis in GeoPDEs? If so > then please kindly let me know. Thanks in advance and have a nice day. > > Best regards, > Naim >  > Sponsored by Intel(R) XDK > Develop, test and display web and hybrid apps with a single code base. > Download it for free now! > http://pubads.g.doubleclick.net/gampad/clk?id=111408631&iu=/4140/ostg.clktrk > _______________________________________________ > Geopdesusers mailing list > Geopdesusers@... > https://lists.sourceforge.net/lists/listinfo/geopdesusers 
From: Md Naim Hossain <md.naimhossain11@gm...>  20131205 10:39:45

Hi, Is there anything so far developed with PHT(polynomial spline over hierarchical tmeshes) spline based isogeometric analysis in GeoPDEs? If so then please kindly let me know. Thanks in advance and have a nice day. Best regards, Naim 
From: Rafael Vazquez <vazquez@im...>  20130826 08:48:35

Dear Sebastian, the example we had in mind was a different quadrature rule, where the elements for the numerical integration do not coincide with the knot spans. In this case the number of nonvanishing functions for some element may be greater than p+1. Regards, Rafa Il 23/08/2013 10:30, Sebastian Eiser ha scritto: > Dear Sirs, > > Thank you for providing the geoPDEs software. I'm reading parts of the code > you provided and was wondering if could explain one detail to me. > > In sp_bspline_1d_param, the variable nsh (number of shape functions) can > vary for the different columns in the array of quadrature nodes. > >> nsh(iel) = nnz (connectivity(:,iel)); > In all the simple examples I run, nsh will be always assigned p+1 (which I > expect), regardless of the column, i.e. all(nsh == nsh_max) > > I can't think of a case where this is not true. Could you provide a counter > example and/or an explanation for this code section? > > Thanks a lot, Sebastian >  > Introducing Performance Central, a new site from SourceForge and > AppDynamics. Performance Central is your source for news, insights, > analysis and resources for efficient Application Performance Management. > Visit us today! > http://pubads.g.doubleclick.net/gampad/clk?id=48897511&iu=/4140/ostg.clktrk > _______________________________________________ > Geopdesusers mailing list > Geopdesusers@... > https://lists.sourceforge.net/lists/listinfo/geopdesusers 
From: Sebastian Eiser <sebastian.eiser@st...>  20130823 09:04:11

Dear Sirs, Thank you for providing the geoPDEs software. I'm reading parts of the code you provided and was wondering if could explain one detail to me. In sp_bspline_1d_param, the variable nsh (number of shape functions) can vary for the different columns in the array of quadrature nodes. > nsh(iel) = nnz (connectivity(:,iel)); In all the simple examples I run, nsh will be always assigned p+1 (which I expect), regardless of the column, i.e. all(nsh == nsh_max) I can't think of a case where this is not true. Could you provide a counter example and/or an explanation for this code section? Thanks a lot, Sebastian 
From: Rafael Vazquez <vazquez@im...>  20130717 17:08:28

The plate with hole is already in the package, in the file "geo_plate_with_hole.txt". The parametrization is different from the one in the first paper on IGA, and is only C^0 along the diagonal line. For the ellipsoid, as Mike said you can simply scale the control points of the sphere. It is very easy to do it in the NURBS toolbox: you can define the sphere using nrbrevolve, and then scale it with nrbtform and vecscale. Rafa 
From: Mike Graham <mikegraham@gm...>  20130717 15:32:35

On Wed, Jul 17, 2013 at 10:46 AM, Mohammad Reza Zibaei <mrzibaei85@... > wrote: > Hi all, > > How can i find control points data (coordinates and weights) for an > elipsoid and > a plate with a circular hole? > I want to compare results of buckling problem about these shapes with > resault that investigated from meshfree method in this book : > '' Mesh free methods [ G. R. Liu]'' > Generally, how information over the more complex twodimensional shapes of > control is achieved? > > Thank you very much for your help. > > Regards, > Mohammad Reza > Check out "Isogeometric analysis: CAD, finite elements, NURBS, exact geometry and mesh refinement" by Hughes, Cottrell, and Bazilevs (2004) for the NURBS data for a plate with a hole. I'm pretty sure you can get an ellipsoid by just scaling the control point locations for a sphere. Mike 
From: Mohammad Reza Zibaei <mrzibaei85@gm...>  20130717 14:46:34

Hi all, How can i find control points data (coordinates and weights) for an elipsoid and a plate with a circular hole? I want to compare results of buckling problem about these shapes with resault that investigated from meshfree method in this book : '' Mesh free methods [ G. R. Liu]'' Generally, how information over the more complex twodimensional shapes of control is achieved? Thank you very much for your help. Regards, Mohammad Reza 
From: Rafael Vazquez <vazquez@im...>  20130423 13:49:01

Dear GeoPDEs users, we have included in GeoPDEs some functions for solving the bilaplacian problem in 2D, with new examples for Kirchhoff plates, everything written by Marco Pingaro. The new functions will be included in the next release of the geopdes_base and geopdes_elasticity packages. For the impatient, you can access them in the sourceforge repository: https://sourceforge.net/p/geopdes/code/HEAD/tree/trunk/ Regards, Rafael Vazquez 
From: Rafael Vazquez <vazquez@im...>  20130410 16:11:41

Dear Mengda, I've just uploaded the package to install GeoPDEs in the Octave mingw version for Windows. You can find the latest package here: https://sourceforge.net/projects/geopdes/files/Octave%20packages%20for%20Windows/ You should be able to install with method 1, that is pkg install geopdes_base2.0.3mingw.tar.gz If you have any problem just let me know. Best, Rafa Il 29/03/2013 16:44, Mengda Wu ha scritto: > Hi All, > > I was trying to the two install methods in README.txt on octave3.6.2 > mingw version. Neither one works. I am using windows XP 32bit OS. > > =================================================================================== > For the method 1: > pkg install geopdes_base<version>.tar.gz > pkg load geopdes_base > > I got > > octave:2> pkg install geopdes_base2.0.3.tar.gz > > gzip: stdout: Broken pipe > op_f_v.cc:20:21: 致命错误：geopdes.h：No such file or directory > 编译中断。 > g++: 错误：op_f_v.o：No such file or directory > make: *** [op_f_v.oct] Error 1 > 'make' returned the following error: make: Entering directory > `/tmp/oct2/geopdes_base/src' > mkoctfile > IC:\DOCUME~1\ABCu00\LOCALS~1\Temp\oct2\geopdes_base\inst\include op_f_v.cc > make: Leaving directory `/tmp/oct2/geopdes_base/src' > error: called from `pkg>configure_make' in file > C:\Octave\Octave3.6.2_gcc4.6.2\share\octave\3.6.2\m\pkg\pkg.m > near line 1385, column 9 > error: called from: > error: C:\Octave\Octave3.6.2_gcc4.6.2\share\octave\3.6.2\m\pkg\pkg.m at > line 827, column 5 > error: C:\Octave\Octave3.6.2_gcc4.6.2\share\octave\3.6.2\m\pkg\pkg.m at > line 383, column 9 > ================================================================================== > For method 2: > cd c:\tmp > mkdir c:\octavepackages > pkg prefix c:\octavepackages c:\octavepackages > system ("tar xzf geopdes_base<version>.tar.gz") > pkg install geopdes_base > > I got > octave:21> pkg install geopdes_base > unpack: FILETYPE must be gunzip for a directory > error: called from `unpack' in file > C:\Octave\Octave3.6.2_gcc4.6.2\share\octave\3.6.2\m\miscellaneous\unpack.m > near line 70, column 7 > error: called from: > error: C:\Octave\Octave3.6.2_gcc4.6.2\share\octave\3.6.2\m\pkg\pkg.m at > line 773, column 5 > error: C:\Octave\Octave3.6.2_gcc4.6.2\share\octave\3.6.2\m\pkg\pkg.m at > line 383, column 9 > > Can you help me? > > Thanks, > Mengda >  > Own the FutureIntel(R) Level Up Game Demo Contest 2013 > Rise to greatness in Intel's independent game demo contest. Compete > for recognition, cash, and the chance to get your game on Steam. > $5K grand prize plus 10 genre and skill prizes. Submit your demo > by 6/6/13. http://altfarm.mediaplex.com/ad/ck/12124176961303672 > _______________________________________________ > Geopdesusers mailing list > Geopdesusers@... > https://lists.sourceforge.net/lists/listinfo/geopdesusers > 
From: Rafael Vazquez <vazquez@im...>  20130402 08:38:05

Dear Mengda, several people had the same problem before. There is a package to install GeoPDEs in Octave using Windows in this direction. http://sourceforge.net/projects/geopdes/files/Octave%20packages%20for%20Windows/ Right now this is only for version 2.0.2, which does not work for the Tsplines plugin. I will upload the version 2.0.3 as soon as possible. Regards, Rafael Vazquez Il 29/03/2013 16:44, Mengda Wu ha scritto: > Hi All, > > I was trying to the two install methods in README.txt on octave3.6.2 > mingw version. Neither one works. I am using windows XP 32bit OS. > > =================================================================================== > For the method 1: > pkg install geopdes_base<version>.tar.gz > pkg load geopdes_base > > I got > > octave:2> pkg install geopdes_base2.0.3.tar.gz > > gzip: stdout: Broken pipe > op_f_v.cc:20:21: 致命错误：geopdes.h：No such file or directory > 编译中断。 > g++: 错误：op_f_v.o：No such file or directory > make: *** [op_f_v.oct] Error 1 > 'make' returned the following error: make: Entering directory > `/tmp/oct2/geopdes_base/src' > mkoctfile > IC:\DOCUME~1\ABCu00\LOCALS~1\Temp\oct2\geopdes_base\inst\include op_f_v.cc > make: Leaving directory `/tmp/oct2/geopdes_base/src' > error: called from `pkg>configure_make' in file > C:\Octave\Octave3.6.2_gcc4.6.2\share\octave\3.6.2\m\pkg\pkg.m > near line 1385, column 9 > error: called from: > error: C:\Octave\Octave3.6.2_gcc4.6.2\share\octave\3.6.2\m\pkg\pkg.m at > line 827, column 5 > error: C:\Octave\Octave3.6.2_gcc4.6.2\share\octave\3.6.2\m\pkg\pkg.m at > line 383, column 9 > ================================================================================== > For method 2: > cd c:\tmp > mkdir c:\octavepackages > pkg prefix c:\octavepackages c:\octavepackages > system ("tar xzf geopdes_base<version>.tar.gz") > pkg install geopdes_base > > I got > octave:21> pkg install geopdes_base > unpack: FILETYPE must be gunzip for a directory > error: called from `unpack' in file > C:\Octave\Octave3.6.2_gcc4.6.2\share\octave\3.6.2\m\miscellaneous\unpack.m > near line 70, column 7 > error: called from: > error: C:\Octave\Octave3.6.2_gcc4.6.2\share\octave\3.6.2\m\pkg\pkg.m at > line 773, column 5 > error: C:\Octave\Octave3.6.2_gcc4.6.2\share\octave\3.6.2\m\pkg\pkg.m at > line 383, column 9 > > Can you help me? > > Thanks, > Mengda >  > Own the FutureIntel(R) Level Up Game Demo Contest 2013 > Rise to greatness in Intel's independent game demo contest. Compete > for recognition, cash, and the chance to get your game on Steam. > $5K grand prize plus 10 genre and skill prizes. Submit your demo > by 6/6/13. http://altfarm.mediaplex.com/ad/ck/12124176961303672 > _______________________________________________ > Geopdesusers mailing list > Geopdesusers@... > https://lists.sourceforge.net/lists/listinfo/geopdesusers > 