Displaying 20 results from an estimated 2000 matches similar to: "Using LAPACK in C-code to be loaded in R - getting-started-help"
2016 Oct 24
3
typo or stale info in qr man
man for `qr` says that the function uses LINPACK's DQRDC, while it in
fact uses DQRDC2.
```
The QR decomposition of the matrix as computed by LINPACK or LAPACK.
The components in the returned value correspond directly to the values
returned by DQRDC/DGEQP3/ZGEQP3
```
2004 Nov 15
1
installing knncat package
Hi all,
I am wondering if anyone has problem installing 'knncat' package. I tried to
install using 'Rcmd INSTALL knncat_1.1.1.tar.gz', error message appeared. I
attached the message in the end. I allso tried to install from RGui, but it
was not listed.
Thanks in advance.
Regards, jenny
---------- Making package knncat ------------
adding build stamp to DESCRIPTION
2001 Oct 11
2
Where's MVA?
Hi All:
Package TSERIES is stated to depend on MVA. However, there is no MVA package to be found under the list of package sources.
Best wishes,
ANDREW
tseries: Package for time series analysis
Package for time series analysis with emphasis on non-linear and non-stationary modelling Version: 0.7-6
Depends: ts, mva, quadprog
Date: 2001-08-27
Author: Compiled by Adrian
2002 Aug 22
1
LAPACK in R
2009 Jun 17
3
Matrix inversion-different answers from LAPACK and LINPACK
Hello.
I am trying to invert a matrix, and I am finding that I can get different
answers depending on whether I set LAPACK true or false using "qr". I had
understood that LAPACK is, in general more robust and faster than LINPACK,
so I am confused as to why I am getting what seems to be invalid answers.
The matrix is ostensibly the Hessian for a function I am optimizing. I want
to get
2017 Feb 09
3
Ancient C /Fortran code linpack error
In my package 'glmmML' I'm using old C code and linpack in the
optimizing procedure. Specifically, one part of the code looks like this:
F77_CALL(dpoco)(*hessian, &bdim, &bdim, &rcond, work, info);
if (*info == 0){
F77_CALL(dpodi)(*hessian, &bdim, &bdim, det, &job);
........
This usually works OK, but with an ill-conditioned data
2009 Oct 20
1
glm.fit to use LAPACK instead of LINPACK
Hi,
I understand that the glm.fit calls LINPACK fortran routines instead of
LAPACK because it can handle the 'rank deficiency problem'. If my data
matrix is not rank deficient, would a glm.fit function which runs on
LAPACK be faster? Would this be worthwhile to convert glm.fit to use
LAPACK? Has anyone done this already?? What is the best way to do this?
I'm looking at very
2003 Jul 16
2
Is there a bug in qr(..,LAPACK=T)
The following snippet suggests that there is either a bug in qr(,LAPACK=T), or some bug in my understanding. Note that the detected rank is correct (= 2) using the default LINPACK qr, but incorrect (=3) using LAPACK. This is running on Linux Redhat 9.0, using the lapack library that comes with the Redhat distribution. I'm running R 1.7.1 compiled from the source. If the bug is in my
2007 Mar 26
1
Problem in loading all packages all at once
Hi All
Please see the Rprofile file which i have modified as follows and after
that when I start R then I see that R says to me "TRUE" for all the
packages implying that all loaded at once.
But when i try to use commands as simple as help("lm"), it doesnt work nor
any of the menu "Packages" is not working.
Although the regression using lm ( Y ~ X ) is working
2017 Feb 09
3
Ancient C /Fortran code linpack error
> > On 9 Feb 2017, at 16:00, G?ran Brostr?m <goran.brostrom at umu.se> wrote:
> >
> > In my package 'glmmML' I'm using old C code and linpack in the optimizing procedure. Specifically, one part of the code looks like this:
> >
> > F77_CALL(dpoco)(*hessian, &bdim, &bdim, &rcond, work, info);
> > if (*info == 0){
> >
2007 Mar 12
1
knncat question
I use knncat to make a predictive model
and get misclass rate
> knncat.m<-knncat(training.new,k=c(10,20),classcol=5)
> knncat.m
Training set misclass rate: 36.88%
then I try to calculate prediction accuracy by the following:
> pr.knncat.train <- predict
(knncat.m,training.new,training.new,train.classcol=5,newdata.classcol=5)
> tb.knncat.train <-table (pr.knncat.train,
2003 May 25
3
Problem in installing R add-on package(not from CRAN)
Hi all,
I downloaded a R package (supclust, not from CRAN) in my directory, then type:
markov:/home/pingzhao> R CMD INSTALL supclust_1.1.tar.gz -l ~/lib
but met the following errors
* Installing *source* package 'supclust' ...
** libs
/usr/local/lib/R/bin/SHLIB: make: not found
ERROR: compilation failed for package 'supclust'
Does it mean the R has not properly installed?
2009 Jun 17
1
Inverting a square matrix using solve() with LAPACK=TRUE (PR#13762)
Full_Name: Ravi Varadhan
Version: 2.8.1
OS: Windows
Submission from: (NULL) (162.129.251.19)
Inverting a matrix with solve(), but using LAPACK=TRUE, gives erroneous
results:
Here is an example:
hilbert <- function(n) { i <- 1:n; 1 / outer(i - 1, i, "+") }
h5 <- hilbert(5)
hinv1 <- solve(qr(h5))
hinv2 <- solve(qr(h5, LAPACK=TRUE))
all.equal(hinv1, hinv2) #
2004 Mar 26
1
Using R's LAPACK & Related files in Visual C++
I am a relative newcomer to both the R and C/C++
software worlds -- I'm taking a C Programming class
currently. I noticed the other day that the
C:\Program Files\R1_8_1\src\include\R_ext
directory on my WinXP box has the header files
BLAS.h
Lapack.h
Linpack.h
RLapack.h
I am interested in (perhaps) using one or more of
these
header files in a straight C program I'm working on in
Visual
2010 Apr 13
1
Lapack, determinant, multivariate normal density, solution to linear system, C language
r-devel list,
I have recently written an R package that solves a linear least squares
problem, and computes the multivariate normal density function. The bulk
of the code is written in C, with interfacing code to the BLAS and
Lapack libraries. The motivation here is speed. I ran into a problem
computing the determinant of a symmetric matrix in packed storage.
Apparently, there are no explicit
2009 Jul 22
1
margins defined in randomForest and supclust
Hi there,
How to solve the conflicts as to the same object between two packages, for
example, like margins in both randomForest and supclust?
When both libraries are installed, supclust will complain "margins" defined
in randomForest.
I can only solve it by re-starting R, which is very inconvenient, any clever
way?
Thanks,
Weiwei
--
Weiwei Shi, Ph.D
Research Scientist
GeneGO, Inc.
2012 Feb 02
1
knncat broken on R 2.14?
Hi,
Until recently I was using the knncat classifier function of
knncat on an old computer (2.12, Mac OS X 10.4), and
everything worked great.
However, now that I have updated to R 2.14.1 (on Mac OS X
10.7), knncat seems broken. Problems:
1. It seems to output verbose output by default, and
regardless of whether I put 0 or 1 into the verbose option.
2. It seems to just predict
2008 Aug 07
1
LAPACK.dll and Excel with R 2.7.0
Hello,
I was building a R addin for Excel. I was able to build R.dll, export to
Rdll.lib and wrap it in a Excel addin (.xll) format. Most basic
functions work fine within Excel except functions that use LAPACK, e.g.
eigen, solve etc. But if you use solve(..., LINPACK = T). That's fine.
So apparently the problem is with loading the shared library
../modules/lapack.dll. I read one of the
2017 Feb 10
1
Ancient C /Fortran code linpack error
> On 10 Feb 2017, at 14:53, G?ran Brostr?m <goran.brostrom at umu.se> wrote:
>
> Thanks to all who answered my third question. I learned something, but:
>
> On 2017-02-09 17:44, Martin Maechler wrote:
>>
>>>> On 9 Feb 2017, at 16:00, G?ran Brostr?m <goran.brostrom at umu.se> wrote:
>>>>
>>>> In my package 'glmmML'
2019 May 09
2
Is it possible to reproduce the result of opt -O3 manually?
Dear developers,
I am trying to reproduce the results of applying opt -O3 to a source file
in the form of LLVM IR. I want to get the same IR by manually ordering the
passes used by O3 and passing them to opt.
To illustrate what I am doing on an example, as an input I use linpack
benchmark from the LLVM test suite[1]:
1. First I produce the intermediate representation using clang:
clang -O3