Displaying 7 results from an estimated 7 matches similar to: "Parameter changes and segfault when calling C code through .Call"
2011 Jun 21
2
Error using RcppGSL
Hi, I get an error using RcppGSL: fatal error: gsl/gsl_vector.h:No such file
or directory. What is the best way to install these files as they seem to
be missing?
Thanks,
Oyvind
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2009 Jul 14
1
matrix algebra in c
I'd like to use some matrix algebra in my c code that is called from R.
I need matrix multiplication, transposition, and Cholesky decomposition.
I haven't come across any easy way to do this, but from browsing the web
and R-devel a few options come to mind:
1. use F77_CALL() to call matrix multiplication functions from blas.
This should be ok as long as I remember that c and FORTRAN store
2005 Mar 18
1
Bivariate normal distribution and correlation
Suppose I know the value of cumulative bivariate standard normal distribution. How can I solve correlation between variables?
Pekka
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2008 Jan 23
2
from a normal bivariate distribution to the marginal one
Hello,
I'm quite new with R and so I would like to know if there is a command
to calculate an integral.
In particular I simulated a bivariate normal distribution using these
simple lines:
rbivnorm <- function(n, # sample size
mux, # expected value of x
muy, # expected value of Y
sigmax, # standard deviation of
2005 Dec 25
4
Portability and Memory Issues for R-package
I have an upcoming JASA paper with an iid sampling algorithm for Bayesian Generalized Linear models (e.g., Logit, Poisson Regression, and Conditional Logit models with multivariate normal priors). At this point, I have implemented the algorithms in C and hope to make the functions and corresponding source code available through an R package. I have successfully created the code necessary to
2007 Jul 02
2
how to use mle with a defined function
Hi all,
I am trying to use mle() to find a self-defined function. Here is my
function:
test <- function(a=0.1, b=0.1, c=0.001, e=0.2){
# omega is the known covariance matrix, Y is the response vector, X is the
explanatory matrix
odet = unlist(determinant(omega))[1]
# do cholesky decomposition
C = chol(omega)
# transform data
U = t(C)%*%Y
WW=t(C)%*%X
beta = lm(U~W)$coef
Z=Y-X%*%beta
2001 Nov 05
1
Why doesn't outer work?
Hello
I'm a population ecologist and use R for all my stats and modelling.
Recently I have been using R to numerically solve integral projection
models. This involves constructing several large matrices. The current code
by Easterling (Size-specific sensitivity: Applying a new structured
population model. Ecology, 2000, 81, 694-708) uses nested loops to construct
the matrices. To speed up the