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Questions tagged [umfpack]

UMFPACK is a set of routines for solving unsymmetric sparse linear systems, Ax=b, using the Unsymmetric MultiFrontal method.

UMFPACK is a set of routines for solving unsymmetric sparse linear systems, Ax=b, using the Unsymmetric MultiFrontal method.

http://www.cise.ufl.edu/research/sparse/umfpack/

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error: LNK1104: cannot open file 'libumfpack.dlld.lib' in QT Creator

I having been struggling with an error for several days now but with no luck to find the correct solution. I'm trying to use the UMFPack library installed with cygwin on windows in a c++ application I'm developing on QT Creator. I added the library…
Hussein Hazime
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Cannot find -lblas and -lgfortran when building UMFPACK

I'm trying to compile the UMFPACK for Windows using the Cygwin compiler following the steps provided in the following documentation: https://github.com/PetterS/SuiteSparse/tree/master/UMFPACK However, when I run the make command after several…
Hussein Hazime
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how to convert UMFpack sparse matrix to Eigen sparse matrix?

I have a code that was written to use UMFpack sparse matrix solver but need to convert it to Eigen sparse matrix but I am running into memory problems. I have Ai (row pointers), Ap (column pointers) and Ax (array). Trying to solve Ax=b. How can I…
user6360
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Appcrash on running UmfPackLU<> with Eigen library

I am compiling and trying to run the UMfPackLU> routine from Eigen 3.2.9 and UMFPACK v4.5 libraries with TDM-GCC 5.1.0 on Win64 platform. But I am getting Appcrash with exception code c0000005. What I need to implement is the…
user4085386
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compiling Suitesparse 4.4.4 with Openblas on linux

I downloaded and compiled Openblas, and now I am trying to compile and link openblas to Suitesparse 4.4.4. After compiling all lib files, I get the following error when the compiler tries to compile umfpack_di_demo.c: …
Chatter
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Is it possible to use pre-calculated factorization to accelerate backslash\mldivide with sparse matrix

I perform many iterations of solving a linear system of equations: Mx=b with large and sparse M. M doesn't change between iterations but b does. I've tried several methods and so far found the backslash\mldivide to be the most efficient and…
user1610336
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Dynare Installing problems: umfpack

I'm trying to compile dynare 4.4.2 on my rosa linux r3 (64bit) for matlab R2013a. The configure step is ./configure --with-matlab=/media/Docs/Studium/matlab MATLAB_VERSION=8.1 But I'm getting the error configure: error: Can't find…
Dmitri
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Compiling SciPy and UMFPACK with Intel compiler on Linux

We're aiming to compile SciPy (and UMFPACK) with the Intel Compiler to use Intel's (multi-threaded) MKL BLASs, having already done this successfully for NumPy. With the help of various websites, we've achieved this for UMFPACK and SciPy without any…
user2736013
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SciKits.umfpack installation

I am trying to install on UBuntu 20.4 the scikits.umfpack python package because it is needed as a dependency for this python packages for network analysis on my dissertation. I am also using python 2.7.18, because the tool I want to use ONLY runs…
Mema Stamataki
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Matrix CSR conversion for umfpack_di_symbolic in C

I would like to resolve a Ax = b linear system. My matrix A is tridiagonal. I have been asked to use the UMFPACK package from SuiteSparse. There is a function called umfpack_di_symbolic which uses the CSR matrices: umfpack_di_symbolic(n, n, ia, ja,…
user19930448
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Installed SciKits.umfpack but getting a NameError on cmd Windows 10 and python 3.7

I need to install SciKits.umfpack and ultimately umfpack as it is the last thing left so I can execute the command I need for my thesis. I have downloaded everything that is needed for the tool from here Python Package - qmbpmn-tools. I was having…
Mema Stamataki
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How to set UMFPACK's tolerance

I am using umfpack in c++ to solve a sparse matrix. I am having trouble finding where the [UMFPACK PIVOT TOLERANCE] parameter is set. Would anybody know how to set this control parameter? My current code is umf::symbolic_type…
Mikhail
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Error when compile umfpack after the update of Mac

I was able to use umfpack, but I just found that I cannot use it as before. I guess the reason is my recent update of Mac. I already installed SuiteSparse VERSION 4.5.4. I use the Fortran interface, umfpack.f90, from…
zz273
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Compile with -fopenmp and linking to UMFPACK at the same time?

I hope everyone is doing well. I am using OpenMP on the cluster to parallelize the computation. I also want to link to UMFPACK to solve the sparse equation system. The UMFPACK is not used in the OMP block. But I found that when I run the code, the…
zz273
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util.obj:-1: error: LNK2019: unresolved external symbol

while connecting a library to QT after building the project I get the following error : util.obj:-1: error: LNK2019: unresolved external symbol umfpack_di_symbolic referenced in function "public: void __cdecl util::Get_Initial_Solution(double…
Hussein Hazime
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