lapack

I installed LAPACK on Ubuntu by following the instruction , sudo apt-get install liblapack-dev thus I can find /usr/lib/libblas/libblas.a and /usr/lib/lapack/liblapack.a , and then tested it in gfortran with the randomsys1 example , gfortran -llapack -lblas randomsys1.f90 gfortran -llapack -L/usr/lib/lapack -lblas -L/usr/lib/libblas randomsys1.f90 but I received the following errors ( dgesv is a LAPACK routine): /tmp/ccnzuuiY.o: In function `MAIN__': randomsys1.f90:(.text+0xb): undefined reference to `init_random_seed_' randomsys1.f90:(.text+0x3c2): undefined reference to `dgesv_' collect2: ld

I would like to be able to compute the inverse of a general NxN matrix in C/C++ using lapack. My understanding is that the way to do an inversion in lapack is by using the dgetri function, however, I can't figure out what all of its arguments are supposed to be. Here is the code I have: void dgetri_(int* N, double* A, int* lda, int* IPIV, double* WORK, int* lwork, int* INFO); int main(){ double M [9] = { 1,2,3, 4,5,6, 7,8,9 }; return 0; } How would you complete it to obtain the inverse of the 3x3 matrix M using dgetri_? First, M has to be a two-dimensional array, like double M[3][3] . Your

I am a beginner with LAPACK and C++/Fortran interfacing. I need to solve linear equations and eigenvalues problems using LAPACK/BLAS on Mac OS-X Lion. OS-X Lion provides optimized BLAS and LAPACK libraries (in /usr/lib) and I am linking these libraries instead of downloading them from netlib. My program (reproduced below) is compiling and running fine, but it is giving me wrong answers. I have researched in the web and Stackoverflow and the issue may have to deal with how C++ and Fortran store arrays in differing formats (row major vs Column major). However, as you will see in my example, the

I am looking for a good (in the best case actively maintained) C++ matrix library. Thereby it should be templated, because I want to use a complex of rationals as numerical type. The matrices what I am dealing with are mainly sparse and unitary. Can you please suggest libraries and also give a small explaination why to use them, because I know how to find them, but I cannot really decide what is suitable for me because I am missing the experience with them. EDIT: The main operations I am dealing with are matrix multiplication , scalar multiplication with a vector and kronecker product . The

I want to learn how to call the built-in LAPACK/BLAS routines in MATLAB. I have experience in MATLAB and mex files but I've actually no idea how to call LAPACK or BLAS libraries. I've found the gateway routines in file exchange that simplifies the calls since I don't have to write a mex file for any function such as this one . I need any toy example to learn the basic messaging between MATLAB and these built-in libraries. Any toy example such as matrix multiplication or LU decomposition is welcome. If you look inside the lapack.m file from the FEX submission mentioned, you will see a couple of

Since a couple of days, I constantly receive the same error while using MATLAB which happens at some point with dlopen . I am pretty new to MATLAB, and that is why I don't know what to do. Google doesn't seem to be helping me either. When I try to make an eigenvector, I get this: Error using eig LAPACK loading error: dlopen: cannot load any more object with static TLS I also get this while making a multiplication: Error using * BLAS loading error: dlopen: cannot load any more object with static TLS I did of course look for the solutions to this problem, but I don't understand too much and don