Displaying 20 results from an estimated 4000 matches similar to: "calling R from C"
2003 Apr 24
1
estimating number of clusters ("Null or more")
Hi all,
once more about the old subj :-)
My data has too much various distribution families and for every
particular experiment
I need just to decide whether the data is "quite homogeneous" or it has
two or more
clusters. I've revisited the following libraries:
amap, clust, cclust, mclust, multiv, normix, survey.
And I didn't find any ready-to-use general
2003 May 08
2
approximation of CDF
Hi all,
is there any package in R capable of smooth approximation of CDF
basing on given sample?
(Thus, I am not speaking about ecdf)
In particular, I expect very much that the approximation should
subject to the property:
f(x0)<=f(x1) for x0<x1, where x0 and x1 belong to range of
the sample given.
Polynomial approximation could be OK for me as well.
P.S.
2003 Apr 25
2
AW: numericDeriv and ecdf
> On only ten points, what did you expect ? Even with 1000
> observations, estimating a density is difficult, and has
> been the subject of a century of research. Kernel density
> estimates are among the most successful. For your immediate
> application, try plot(density(rnorm(10)), type="l"), etc.
wait, you misunderstood me!
I'd like to see 10 or 9 points with
2003 Apr 25
1
numericDeriv and ecdf
Hi All,
following expression:
x <- sort(rnorm(10)); e <- ecdf(x); d <- numericDeriv(e(x),"x");
makes d far from approximation of one dimensional pdf.
What's wrong then here?
Kind regards.
---------------------------------------------------------------------------
Valery A.Khamenya
Bioinformatics Department
BioVisioN AG, Hannover
2003 May 08
1
AW: approximation of CDF
> Almost any method of fitting a density estimate would work on
> integrating (numerically) the result.
it is a nice idea concerning the monotony property, which
will be obtained automatically, but I am going to use results
of approximation analytically
> In particular, look at package polspline, where
> p(old)logspline does the integration for you.
thank you, I am going to
2003 May 13
3
homals for win32?
Hi All
is there "homals" package prepared for win32?
kind regards,
Valery A.Khamenya
---------------------------------------------------------------------------
Bioinformatics Department
BioVisioN AG, Hannover
2003 May 15
1
error-prone feature?
Hi All,
while looking why the cclust(cclust) doesn't work for 1-dimensional data,
I've found unpleasant behavior in semantics of R. Indeed:
is.matrix(matrix(cbind(c(1,2,3,4)),ncol=2)[1:2,]) == TRUE
but:
is.matrix(matrix(c(1,2))[1:2,]) == FALSE
kind regards,
Valery A.Khamenya
---------------------------------------------------------------------------
Bioinformatics
2003 May 15
2
AW: error-prone feature?
> Well, that is in all good texts on R, together with the
> solution: drop=FALSE. See ?"[" for the on-line details.
OK. Thank you a lot. Now patched cclust and clustIndex
work fine for 1D case. BTW, why not to apply the "drop=F"
to these functions? I guess other users need 1D case as
well.
kind regards,
Valery A.Khamenya
2004 Aug 09
5
AW: built-in Sweave-like documentation in R-2.x
> See the 'Writing R Extensions' manual, specifically
> Creating R Packages -> Writing package vignettes
thank you, i saw this entry. However, this entry is rather
about how to include documents (in particular Sweave-based)
into a package. But I have meant smth else.
Let me explain in example. Today I use emacs as
environment for my R-sessions. I am quite happy to
use
2004 Aug 09
3
built-in Sweave-like documentation in R-2.x
Hi devels,
i did not find at this page:
http://developer.r-project.org/ideas.txt
any ideas concerning incorporating documentation
possibilities (say, Sweave-based) into R-scripts.
Was it discussed already?
(If discussed, then what is the decision/conclusion then?)
thanks,
Valery
2004 Oct 08
3
provide extra variables to environment in call
Hi all,
Situation:
there is a function `f' already defined by someone and
provided in package. `f' looks like that:
f <- function() {
x+1
}
i.e. `f' is not closed i.r.t. term `x'
now I have my own function `g', where I'd like
to override variable `x' while calling `f':
x <- "dummy gloabal value"
g <- function() {
x
2004 Oct 01
5
R-2.0: roadmap? release statements? plans?
Hi all,
I took a look at last 2 months post in R-help maillist
and surfed through the R-project.org . Unfortunately,
I can't find some page with roadmap/statements about
major changes coming in R-2.0 in comparison to R-1.9
Could anyone point me to the right URL?
Thank you in advance.
--
Valery
2004 Oct 01
5
R-2.0: roadmap? release statements? plans?
Hi all,
I took a look at last 2 months post in R-help maillist
and surfed through the R-project.org . Unfortunately,
I can't find some page with roadmap/statements about
major changes coming in R-2.0 in comparison to R-1.9
Could anyone point me to the right URL?
Thank you in advance.
--
Valery
2004 Sep 30
2
How to save graphics in portable way in batch mode?
Hi all,
What is the right portable way to save graphics
in batch mode?
Remarks:
1. Problem is STFWed and RTFMed. In particular a short note
about png() is found in R-FAQ. In fact, there were stated
that png() is not reliable under Linux in batch mode.
2. savePlot under windows is quite convenient, but
not supplied under Linux.
3. pdf() + postscript() < savePlot()
2008 Mar 17
2
[LLVMdev] LLVM has entered the google trends!
Hi all
see $subj
http://www.google.com/trends?q=llvm
congrats!
P.S. sorry if known.
best regards
--
Valery A.Khamenya
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2003 Apr 28
0
AW: AW: numericDeriv and ecdf
Dear Prof. Brian Ripley,
first of all thank you for your answer, I do appreciate
how do you manage to keep successfully all your
activities and answer posts in this forum!
> An empirical CDF is a step function: it does not have a
> derivative at the jump points, and has a zero
> derivative everywhere else.
of course!
Let me add few words concerning my simple motivation.
1.
2003 May 15
0
AW: AW: error-prone feature?
> Nothing to do with me: you should report problems with
> packages to the
> maintainers, rather than R-help or a member of R-core.
OK.
I've sent a note about cclust patch to Evgenia Dimitriadou
Thank you for your valueable comments.
(No more reply needed in this thread)
kind regards,
Valery A.Khamenya
---------------------------------------------------------------------------
2003 Oct 28
2
[LLVMdev] cfrontend/src/configure
Hi all,
subj has the first line:
#! /usr/dcs/software/supported/bin/bash
I think we could be more liberalistic :)
best regards,
---
Valery A.Khamenya
2010 Sep 13
4
[LLVMdev] Any experiemnts/evaluations on LLVM and graph rewriting (term-rewriting) systems?
Hi,
are there any attempts to use LLVM in graph-rewriting (term-rewriting)
language implementations?
How good is LLVM for this?
E.g., is it natural to expect that the LLVM-based implementation of the
language Concurrent Clean be any faster than its reference implementation?
Best regards
--
Valery A.Khamenya
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2004 Aug 17
4
[LLVMdev] compilation error after updated from cvs:
Building PowerPC.td register information header with tblgen
Included from PowerPC.td:22:
Parsing PowerPCInstrInfo.td:53: Variable not defined: 'GPRC'!
make[3]: *** [PowerPCGenRegisterInfo.h.inc] Error 1
make[3]: Leaving directory `/pool/tmp/ssrc/llvm/lib/Target/PowerPC'
maybe I just have to "make clean" and/or ./configure
BTW, would it be nice to put Depend, Release and