Displaying 20 results from an estimated 100 matches similar to: "R help for invoking nmmin()"
2006 Apr 13
1
bus error on calling nmmin
Hi,
I'm trying to get a toy program making use of nmmin to run
successfully. I've gotten to the point of compiling. However, when I
attempt to run my executable, I guess a bus error. I see that someone
else has asked about using nmmin before
<http://tolstoy.newcastle.edu.au/R/help/06/03/23944.html>, but I
haven't come across any replies.
Is there some documentation on how to
2005 Feb 14
1
how can i make my program faster
Hello,
right now, i have a program to collect data into a table. right now, my table is
table1 <- data.frame(trial = NA, x = NA, y = NA)
for each time when i want to add data into my data, i have to copy data of table into an array for each column, and then i add new data into my array, then i copy my array into the table one column by one column. For example
temptrial <- table1$trial;
2006 Mar 29
1
calling R's optimization routines from C
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
2009 Nov 06
1
Survival Plot in R 2.10.0
I would like to produce a complimentary log-log survival plot with
only the points appearing on the graph. I am using the code below,
taken from the plot.survfit page of help for the the survival package
(version 2.35-7).
I am running in R 2.10.0 on Windows XP, and the list of packages
following
the error is loaded. Is there some specific 'type= ' syntax, or an
additional parameter
that
2012 May 06
2
Translation of matlab vectors code into r
Hi there
I am new user of r, i would need some help to translate som code for vectors
in matlab to r. I have managed to translate the first 7 rows, but not the
rest. Could anyone give me any suggestions for this problem??
Matlab code:
tempo=[];
temps=[];
tempn=[];
tempao=[];
tempas=[];
tempan=[];
for k=1:5
tempo = [tempo n_o(k,:)];
temps = [temps n_s(k,:)];
tempn = [tempn
2007 Oct 13
1
R API - optim
I am trying to use the R API to call optim functions (nmmin, vmmin, lbfgsb,
etc.) through a C program but I couldn't find the shared library to link
under the R-2.6.0 build which is compiled under Linux (REL5).
main.cpp:35: undefined reference to `Rf_initEmbeddedR(int, char**)'
main.cpp:41: undefined reference to `nmmin'
Thanks in advance for any help.
------------------------
2006 Mar 24
0
using R's optimization routines from C
Dear all,
I have been trying to use R's optimization routines from C and I have some
questions. Specifically, I am testing the usage of nmmin which performs
Nelder-Mead optimization in order to learn how to do the above exercise.
I understand from the notes in Chapter 5 that the declaration for both optimfn
as well as nmmin are included in the header file R_ext/Applic.h so I have
included
2015 Jun 11
0
Odd behavior of plot function
Sorry, that's a cut and paste error. It should be either tempx or xtemp throughout.
Terry T
On 06/11/2015 12:59 PM, John Nolan wrote:
> Is there a misprint in your example? The first line of code uses tempx, but the rest uses a different variable xtemp?
>
> John
>
> -----"R-devel" <r-devel-bounces at r-project.org> wrote: -----
> To: "r-devel at
2007 Oct 23
0
API for optimization with Simulated annealing
Dear list,
I was trying to use the R API for optimization method "Simulated annealing"
void samin(int n, double *x, double *Fmin, optimfn fn, int maxit,
int tmax, double temp, int trace, void *ex);
but I encountered the following problem:
The implementation of the function samin (as seen in src/main/optim.c)
passes its void * argument "ex" into the function
2011 Dec 14
1
series temporales. índices de variación estacional
Hola.
Estoy empezando a ver temas de series temporales y me gustaría saber
como obtener con R los IVES (índices de variación estacionales).
Por el momento estoy viendo cosas muy simples, como descomponer una
serie en tendencia y componente estacional, usando la función decompose
y también la función stl.
Por ejemplo
# generamos 48 datos de una normal por ejemplo
x <- rnorm(48)
# creamos el
2002 Jan 25
0
rpart subsets
A few weeks back I posted that the subset feature of rpart was not working
when predicting a categorical variable. I was able to figure out a simple
solution to the problem that I hope can be included in future editions of
rpart. I also include a fix for another related problem.
The basic problem is that when predicting a categorical using a subset, the
subset may not have all the categories
2002 Jan 28
0
rpart subset fix
(Apparently, I posted this to the wrong place. I am hopefully posting this
is the correct place now. If not, please advise.)
A few weeks back I posted that the subset feature of rpart was not working
when predicting a categorical variable. I was able to figure out a simple
solution to the problem that I hope can be included in future editions of
rpart. I also include a fix for another related
2001 Feb 28
1
Spider diagrams
Hi, I am trying to create what are called "spider diagrams" in the geochemical
literature using R. A spider diagram is basically a plot of the atomic number
versus the concentration on a log scale. Lines are drawn from each atomic
number for each sample.
Right now, my data frame looks like:
SAMPLE SITE V3 LA.NASC LAATNUM CE.NASC CEATMNUM
1 1A:001
2023 Jan 12
1
return value of {....}
Dear Akshay,
The best response was given by Andrew. "{...}" is not a closure.
This is unusual for someone used to C-type languages. But I will try to
explain some of the rationale.
In the case that "{...}" was a closure, then external variables would
need to be explicitly declared before the closure (in order to reuse
those values):
intermediate = c()
{
??? intermediate
2009 Jul 02
2
constrained optimisation in R.
i want to estimate parameters with maximum likelihood method with contraints (contant numbers).
for example
sum(Ai)=0 and sum(Bi)=0
i have done it without the constraints but i realised that i have to use the contraints.
Without constraints(just a part-not complete):
skellamreg_LL=function(parameters,z,design)
{
n=length(z);
mu=parameters[1];
H=parameters[2];
Apar=parameters[3:10];
2015 Jun 11
0
Odd behavior of plot function
The following code snippet taken from plot.survfit now gives me a surprising result:
tempx <- c(0, 400, 0, 0)
ytemp <- c(.0657, .98, 1, 0)
plot(range(xtemp), range(ytemp), log='y', type='n')
In that the max value for the x axis is now 10. The 0 on the end of ytemp was actually a
mistake and shouldn't be there, if you remove it then the upper limit is sensible.
2002 May 02
2
plot survival points
Hi all,
I have a little problem.
I make an weibull survival analysis using the survival package. It,s OK, them
I have the functions. I plot this funcions with curve(). I want to make a
plot with the real survival points (proportion of alive x time) and them add
the curves to points. I have the time to dead, the censor data and my
trataments. To analysis the model is:
model1 <-
2004 Jun 01
2
Importing binary data
Hi everybody!
I've a large dataset, about 2 Mio entries of the format which I would like
to import into a frame:
<integer><integer><float><string><float><string><string>
Because to the huge data amount I've choosen a binary format instead
of a text format when exporting from Matlab.
My import function is attached below. It works fine for only
1996 Dec 16
0
Re: vixie-crontab for redhat linux (Fix)
[Mod: Sent to linux-security instead of linux alert -- alex]
Dave G. <daveg@ESCAPE.COM> wrote:
> /* vixie crontab buffer overflow for RedHat Linux
> *
> * I dont think too many people know that redhat uses vixie crontab.
> * I didn''t find this, just exploited it.
The vulnerability involves an unguarded sscanf call in env.c. Enlarging
the buffer to the largest
2008 Jan 24
1
zfs showing more filesystem using ls than df actually has
Platform T2000
SunOS ccluatdwunix1 5.10 Generic_125100-10 sun4v sparc SUNW,Sun-Fire-T200
I have a user that stated zfs is allocating more file system space than
actually available via ls command versus what df -k shows.
He stated he used the mkfile to verify if ZFS quota was working.
He executes "ls -s" to report usage which reports more allocated than
available from "df