similar to: typo in R-exts.html section 6.9

I agree, and the text is less than ideal in several other places. But I don't especially like your phrase 'infinite range', even though the idea is right. I think the necessary terminology already exists. How about something like this? There are interfaces (defined in header R_ext/Applic.h) for definite ("proper") and for _improper_ integrals, improper meaning that at

Hey, I'm trying to find how to perform operations with a variable treated as a symbol. For, an extremely simple, example I want to integrate a*x with respect to x and I want to find the indefinite integral of this, (a*x^2/2), or the definite integral with some interval for x. Another example of such a use would be to create a function y<-function(x) {a*x} and by typig y(2) I would get the

Dear all, I have some issues with integrate in R thus I would like to request your help. I am trying to calculate the integral of f(x)*g(x). The f(x) is a step function while g(x) is a polynomial. If f(x) (step function) changes its value only few times (5 or 6 'steps') everything is calulated ok(verified results in scrap paper) but if f(x) takes like 800 different values I receive the

Hi list, To call C, I used to use R-extension in windows but I'm moving to unix system because my PC doesn't have enough memory. My C codes requires to include the following header files: #include <stdlib.h> #include <R.h> #include <Rdefines.h> #include <Rmath.h> #include <R_ext/Applic.h> #include <R_ext/PrtUtil.h> In windows, I had no problem with it

Hi Everyone, I have modified my version of R-1.4.1 to include choleski with pivoting (like in Splus). I thought R-core might consider including this in the next version of R, so I give below the steps required to facilitate this. 1. Copied Linpack routine "dchdc.f" into src/appl 2. Inserted line F77_SUBROUTINE(dchdc) in src/appl/ROUTINES 3. Inserted "dchdc.f" into

Dear R useRs, i have the function f1(x, y, z) which i want to integrate for x and y. On the one hand i do this by first integrating for x and then for y, on the other hand i do this the other way round and i wondering why i doesn't get the same result each way? z <- c(80, 20, 40, 30) "f1" <- function(x, y, z) {dgamma(cumsum(z)[-length(z)], shape=x, rate=y)}

Hi, I have read R's Writing Extensions manual and am still confused about how to use some of the routines there when I call from C. Specifically, I am writing a little test function which I will optimize using the nmmin function which underlies R's optim() with Nelder-Mead. I guess I wonder what library/header files I should be using. I was using R_ext/Applic.h and linking with libR but I

Hi, I'm using dyn.load to load a shared library (compiled from C code) into R. If I dyn.unload it and then dyn.load it again, I get an hourglass icon in Rgui (R 1.7.0, Win 2000), and it just sits there forever. I can't press Escape to stop the current computation, but I can close Rgui without resorting to using the Task Manager. Is it a problem with my use of R_alloc? Do I need

I've written a series of functions that evaluates an integral from -inf to a or b to +inf using equally spaced quadrature points along a normal distribution from -10 to +10 moving in increments of .01. These functions are working and give very good approximations, but I think they are computationally wasteful as I am evaluating the function at *many* points. Instead, I would prefer to use

There looks to be a typo in the R-exts manual: The whose @file{tests} is copied to the check area, ... ^^^^^ I'm not sure what was intended here, so I can't suggest a fix. (from https://svn.r-project.org/R/trunk/doc/manual/R-exts.texi) -- Tony Plate

Hi I am new to writing C code and am trying to write an R extension in C. I have hit a wall with F77_CALL(dgemm) in that it produces wrong results. The code below is a simplified example that multiplies the matrices Ab and Bm to give Cm. The results below show clearly that Cm is wrong. Am= 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 Bm= 1 1 1 1 1

Hi - I am doing some monte carlo simulations comparing bayesian (using Plummer's jags) and maximum likelihood (using lmer from package lme4 by Bates et al). I would like to know if there is a way I can flag nonconvergence and exceptions. Currently the simulations just stop and the output reads things like: Error in optim(.Call("lmer_coef", x, 2, PACKAGE = "Matrix"), fn,

Hi, I would like to call R's lbfgsb function from my C/C++ code by including R_ext/Applic.h and linking against libR. Currently, I am allocating memory for x (and the other input arrays for lbfgsb) in my C/C++ code via malloc/new. However, this gives a segmentation fault when executing the program. I tried to allocate x via PROTECT(x = NEW_NUMERIC(n)); x_p = NUMERIC_POINTER(x);. This compiles

I have been trying to compile the earth Multivariate Adaptive Regression of Splines package as a standalone application under Linux (x86_64 kernel-2.6.27.21 openSUSE 11.1) with gcc 4.3.2. The package compiles without problems from within R as an R module and I get the following linker error: earth.c:(.text+0x1a14): undefined reference to `dqrdc2_' earth.c:(.text+0x1ae4): undefined

Dear All, I've read the manual on "Writing R Extensions" and in particular the part on calling R from C. (Most of the manual is about calling C from R, not the other way around.) The good news is that I can now call _some_ R from C, specifically the R functions which have C header files. However it isn't clear to me how to call R functions that are written in R. I

Dear all, I am trying to use the C code for "integrate" function ( that calls Rdqagi and Rdqags) so that I can integrate a function defined in C, instead of passing from R. Is there a way for doing this? My unsuccessful attempt: I looked into the files (including integrate.c, Applic.h) and 1. modified the definition of "integr_fn" by droping the environment

R 2.1.0/src/include from 2005/04/18 download Naming inconsistent for guards as well but that's pedantic. Simple convention: file <foo.h> #ifndef R_FOO_H file <R_ext/bar.h> #ifndef R_EXT_BAR_H Missing guards: <IOStuff.h> <Internal.h> <Parse.h> <R_ext/GraphicsBase.h> <R_ext/GraphicsDevice.h> <R_ext/GraphicsEngine.h>

My server just literally was brought to it's knees with this message spewing on the console: swap_pager: indefinite wait buffer: bufobj: 0, blkno: 1203133, size: 4096 (blkno and size were varying) Some searching says that this is or was a bug. Has this been fixed yet? If so, what should I upgrade to? I'm currently running 6.3 Michael Grant

Hi every one, I am running cups and samba on Centos 4.3. printer prints immediately. I do not need it. But I need to hold print jobs until I manually relaese them . How can I do it ? pls let me know. i went to many sites and did many things. But The problem is still there? below gives some info I got it form the internet. I pls read it. I actully need it. pls help me. pls read the below CUPS

Hi. Googled but did not found the answer for the following little issue. how to force R gui on windows (maybe a specific setting) to always show the last line of output in the window console. My program in R makes measurements every 5 mins in indefinite loop and prints results in the console. The problem: last messages are not visible, The scrolling bar of the gui console gets shorter.