search for: dposv

...or a parameter taking explicit single-character Fortran string, it may crash. I've debugged one case with R package BDgraph, this example "library(BDgraph); data.sim <- bdgraph.sim( n = 70, p = 5, size = 7, vis = TRUE )" crashes due to corruption of C stack by Fortran function DPOSV, when compiled with the new gfortran and with -O2. To see the problem, one can just look at the disassembly of DPOSV (LAPACK), neither the package nor R is not necessary: SUBROUTINE DPOSV( UPLO, N, NRHS, A, LDA, B, LDB, INFO ) CHARACTER????????? UPLO In one case, DPOSV calls DPOTRS before retur...

Hi, I have tried to pinpoint potential problems which could lead to the LAPACK issues that are currently seen in R. I built the current R trunk using AR=gcc-ar RANLIB=gcc-ranlib ./configure --prefix=$HOME --enable-lto --enable-BLAS-shlib=no --without-recommended-packages and used this to find problem areas. There are quite a few warnings that were flagged, due to mismatches in function

Hi all, i am trying to compile a test, calling from C code R Lapack shared libraries. In particular, i am calling simple LAPACK driver dposv for solving linear equation system A*x=B with positive definite A. My code looks like the following in solve.c ========================== #include<stdio.h> #include <R_ext/BLAS.h> #include <R_ext/Lapack.h> int main(){ double A[4]={1,0.5,0.5,1}; double B[2]={3,4}...

...updated r-base package carrying the > patch to configure. Thanks. Btw, Tomas just told R Core that ********************************************************************* I had a quick look at reference lapack builds in different distributions: looking at the disassembly, and specifically for dposv tail-calling into dpotrs. I checked the latest packages from Fedora 30, Fedora Rawhide (the same?), Ubuntu 19.04, Debian Sid, OpenSuse Leap 42.3. None of the builds had that problem (yet). I've been looking for the packages via pkgs.org. ******************************************************...

On 10 May 2019 at 18:31, Kurt Hornik wrote: | Thanks. Btw, Tomas just told R Core that | | ********************************************************************* | I had a quick look at reference lapack builds in different | distributions: looking at the disassembly, and specifically for dposv | tail-calling into dpotrs. I checked the latest packages from Fedora 30, | Fedora Rawhide (the same?), Ubuntu 19.04, Debian Sid, OpenSuse Leap | 42.3. None of the builds had that problem (yet). I've been looking for | the packages via pkgs.org. | *******************************************...

Hi, I'm writing an R package using the C code i've written. I'm wondering if anyone knows an easy way to calculate an inverse and cholesky factor of a matrix using the Fortran/C library of R: and how to call them from C. My code is based on the Numerical Reciepe code, and I'm trying to use something that is already in R. Thanks for your help in advance, Kosuke

>>>>> Dirk Eddelbuettel writes: > On 10 May 2019 at 10:52, Johannes Ranke wrote: > | Thanks, that sounds good. But I need some help as I do not know much about > | autoconf and Debian packaging: Is it enough to patch configure.ac (r76467) or > | do we need to update configure as well (r76468)? > Again, that would happen in the sources you pick up from me, and per