Although this query was inspired by distributed random number
generation, one of the questions (#2 below) is a single-machine issue.
I call C++ code from R to generate simulated data. I'm doing this on a
cluster, and use rmpi and rsprng. While rsprng randomizes R-level
random numbers (e.g.,
On 30 June 2007 at 12:12, Ross Boylan wrote:
| I call C++ code from R to generate simulated data. I'm doing this on a
| cluster, and use rmpi and rsprng. While rsprng randomizes R-level
| random numbers (e.g., from runif), it has no effect on the C code, which
| is completely SPRNG and MPI
On Sat, 2007-06-30 at 14:50 -0500, Dirk Eddelbuettel wrote:
On 30 June 2007 at 12:12, Ross Boylan wrote:
| I call C++ code from R to generate simulated data. I'm doing this on a
| cluster, and use rmpi and rsprng. While rsprng randomizes R-level
| random numbers (e.g., from runif), it has no
Dear Friends,
I was wondering if there is any package to get random numbers from the Burr 10
distribution. I checked the rmutil and actuar package. Both seems to implement
the Burr 12 distribution.
thanks in advance
Regards
Anup
-
Dear R-help,
Which random number generator function would you recommend for simply picking
15
random numbers from the sequence 0-42? I want to use replacement (so that the
same number could potentially be picked more than once).
I have read the R-help archives and the statistics and computing
it helps,
kevin
- Original Message -
From: Jenny Barnes [EMAIL PROTECTED]
Date: Wednesday, June 6, 2007 10:30 am
Subject: [R] random numbers selection - simple example
Dear R-help,
Which random number generator function would you recommend for
simply picking 15
random numbers from
Assuming you want only integers, see
?sample
Sarah
On 6/6/07, Jenny Barnes [EMAIL PROTECTED] wrote:
Dear R-help,
Which random number generator function would you recommend for simply picking
15
random numbers from the sequence 0-42? I want to use replacement (so that the
same number could
On 06-Jun-07 14:30:44, Jenny Barnes wrote:
Dear R-help,
Which random number generator function would you recommend for
simply picking 15 random numbers from the sequence 0-42? I want
to use replacement (so that the same number could potentially be
picked more than once).
R has the function
-Original Message-
From: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED]
On Behalf Of Jenny Barnes
Sent: Wednesday, June 06, 2007 7:55 AM
To: r-help@stat.math.ethz.ch
Subject: Re: [R] random numbers selection - simple example
You're all stars - thanks for the replies - I will go ahead
Hi there:
I'd thought these two versions of noncentral t-distribution are essentially
the same:
qqplot(rt(1000,df=20,ncp=3),qt(runif(1000),df=20,ncp=3))
But, the scales of the x-axis and the y-axis are quite different according to
the QQ-plot.
Did I make any mistakes
On Fri, 30 Jun 2006, Long Qu wrote:
Hi there:
I'd thought these two versions of noncentral t-distribution are essentially
the same:
qqplot(rt(1000,df=20,ncp=3),qt(runif(1000),df=20,ncp=3))
But, the scales of the x-axis and the y-axis are quite different according
to the QQ-plot.
Thank you very much for your kind reply. It solved the problem of rt( ). :D
But it seems that the qt( ) also have problems:
I modified the rt( ) function as you suggested,
rt - function (n, df, ncp = 0)
{
if (ncp == 0)
.Internal(rt(n, df))
else rnorm(n, ncp)/sqrt(rchisq(n, df)/df)
}
On Sat, 1 Jul 2006, Long Qu wrote:
Thank you very much for your kind reply. It solved the problem of rt( ). :D
But it seems that the qt( ) also have problems:
Yes, there does seem to be a problem near zero. A clearer version is
curve(qt(x,df=20,ncp=3),from=0,to=0.004)
Dear list,
I did simulations in which I generated 1
independent Bernoulli(0.5)-sequences of length 100. I estimated
p for each sequence and I also estimated the conditional probability that
a one is followed by another one (which should be p as well).
However, the second probability is
On Tue, 27 Jun 2006, Christian Hennig wrote:
Dear list,
I did simulations in which I generated 1
independent Bernoulli(0.5)-sequences of length 100. I estimated
p for each sequence and I also estimated the conditional probability that
a one is followed by another one (which should be p
On Tue, 27 Jun 2006, Thomas Lumley wrote:
I got the table wrong, it should read
x1/0 1/1 est11
000 - - -
001 - - -
010 1 0 0
011 0 1 1
100 1 0 0
101 1 0 0
110 1 1 0.5
111 0 2 1
So the explanation is slightly
Hi All.
I have R code whose functionality is being replicated within a C+
program. The outputs are to be compared to validate the conversion
somewhat - however (as is always the case) I have stuffed my code with
random number calls.
Random uniform numbers in C+ are being produced using the
On 12/21/2005 9:47 AM, Carl wrote:
Hi All.
I have R code whose functionality is being replicated within a C+
program. The outputs are to be compared to validate the conversion
somewhat - however (as is always the case) I have stuffed my code with
random number calls.
Random uniform
You can use Marsaglia's multiply with carry. I haven't looked at the C
code in R recently, but doubt if it has changed. The C code is very
neat, using 6 #defines:
static const double RANDCONST=2.32830643654e-10;
unsigned long zSeed=362436069, wSeed=521288629;
#define zNew
Dear Colleagues,
Is there a way to get random numbers within a given range?
Regards and thanks in advance,
Raj
[[alternative HTML version deleted]]
__
R-help@stat.math.ethz.ch mailing list
https://stat.ethz.ch/mailman/listinfo/r-help
PLEASE
Rajdeep Das [EMAIL PROTECTED] writes:
Is there a way to get random numbers within a given range?
Yes. What distribution? If uniform, see help(Uniform).
--
O__ Peter Dalgaard Blegdamsvej 3
c/ /'_ --- Dept. of Biostatistics 2200 Cph. N
(*) \(*) -- University of
Hello
I´m a student from Spain. I couldn´t find something about R and I was asking
if someone could tell me which generator of random numbers use rnorm and
runif. I think I have discovered that in runif they use the inversion
method, but I don´t find any clue where they use the Super-duper
Have you looked at ?set.seed? This provides some detail in R 1.8.1
for Windows.
hope this helps.
spencer graves
p.d. No hay que desculparse por su inglés. Está claro.
Silvia Perez Martin wrote:
Hello
I´m a student from Spain. I couldn´t find something about R and I was
asking if
Take a look at the help for RNGkind as follows:
?RNGkind
Ravi.
- Original Message -
From: Silvia Perez Martin [EMAIL PROTECTED]
Date: Tuesday, December 16, 2003 12:45 pm
Subject: [R] Random Numbers
Hello
Im a student from Spain. I couldnt find something about R and I
was asking
On Tue, 16 Dec 2003, Silvia Perez Martin wrote:
Hello
I´m a student from Spain. I couldn´t find something about R and I was asking
if someone could tell me which generator of random numbers use rnorm and
runif. I think I have discovered that in runif they use the inversion
method, but I
Thank you to all who helped me with the generation of random numbers. I have
read much and learned even more. I even found some code that I have translated
into java and am getting seemingly random output. :)
I was wondering if there were any libraries for R which test the 'randomness'
of the
Thank you to all who replied to my previous question regarding the generation
of random numbers.
I have read up on the literature and learnt a whole lot more. In my research I
found code for many generators which I have translated into java for my
project. I'm now at the stage of testing
27 matches
Mail list logo
