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Dear friends
Suppose the correlation matrix of x1-x3 is as follows
x1 x2 x3
x1 1
x2 0.5 1
x3 0.6 0.4 1
1.First to generate the matrix of x1-x3 in R
2.to get the random num
I would like to save graphics I produce in jpeg or gif
formats. The GDD package sounds like it should let me
to do this but I cannot get it to install (error
Can 't find gd.h!). Anyone know what 's uHi WizaRds
In MATLAB you can do
x 1 10
and then specify
x(2 end)
to get
2 3 4 5 6 7 8 9 10
or whatever (note that in MATLAB the parenthetic index notation is used not brackets as in R). The Hello
I 'm looking to calculate a 95% confidence interval about my estimate for
a sample 's weighted mean where the calculated confidence interval would
equal the t-test confidence interval of the samDear R users
Is there any way to increase the decimal accuracy for the normal probability distribution? When one needs an accurate p-value for instance this is provided by
pnorm(10 lower.tail F)
[1]Dear all
This may seem obvious for some of you but it got me thinking.
Can one use correlations (or R^2) as data for an ANOVA?
The case in hand I have several models fitting the same data (indiviDear all
There have been one or two questions posted to the list regarding the optim
error "non-finite finite-difference value [4]. " The error apparently means
that the 4th element of the gradienI 'm fitting a mixed effects model
fit.1 <- lme(y~x random ~1|id data df)
There are two different observations for each id for both x and y. When
I use plot(fit.1) there is a strong increasing lineDear Sir/Madam
I simply want to draw x-y plot with Julian dates (x) and numbers (y).
Please see below for my program.
In the older version of R the plot(jdat miles) worked without any problem.
BuDear List
I neeed a grouped list with two sort of categorical data. I have a data
.frame like this.
year cat. b c
1 2006 a1 125 212
2 2006 a2 256 212
3 2005 a1 14 12
4 2004 a3 565 123
5 2004 a2 15nurza m wrote
> Hi list
> How to do numerical differentiation in R. is it using
> genD in numDeriv package
This depends on why you want the derivatives. The functions in numDeriv
use Richardson extThank you Martin
> Christian > Dear list R CMD check on my updated package now
> Christian > generated the following error
>
> Christian > "LaTeX errors when creating DVI version. This
> assuming that the rows are sorted correctly
dat
id x y
1 50 1647685 4815259
2 50 1647546 4815196
3 50 1647454 4815294
4 50 1647405 4815347
5 50 1647292 4815552
6 50 1647737 481541 > > > > > "Christian " Christian Hennig <chrish@(protected) >
> > > > > on Wed 9 Aug 2006 17 21 18 +0100 (BST) writes
Christian > Dear list R CMD check on my updated package now
Christian >Thanks. And sorry for abusing the word crash. I understand the
difference. However now that you mention it there is a case where I
think R is crashing. I 'm not sure if it 's R or if it 's the Mac Hello all
I had problems with an extension to a classic optimization problem.
The target is to minimize a quadratic form a 'Ma with respect to vector
b where vector a (b ' -1) ' i.e. a is the expalibrary(gtools)
cb <- function(n r) t(apply(combinations(n r) 1 function(x) ifelse(1 n %in% x 1 0)))
cb(6 3)
On Wednesday 09 August 2006 18 31 Dimitris Rizopoulos wrote
> try this
>
> fun1 <- function(x) {
> environment(fun2) <- environment()
> ifelse(somecondition bb <- "o " bb <- "* ")
> ## Hello all
Trying to implement GARCH(1 1) with ASP.NET <http //asp.net/ > and
VB.NET <http //vb.net/ >.
It involves optimization of a three-variate function with some constraints.
Learned from Wilmott.
Hello!
The IWigdets combobox has an option "selectioncommand " to specify a procedure
which is called when an item in the combobox is selected.
Does ComboBox from Bwidgets have an equal option or This is not the right list for your question.
Question on how to use R and R 's libraries should be posted to
R-help@(protected)
Patrick Zhang wrote
> Hello all
>
> Trying to implement GARHi
I am having a problem with a very slow indexing and sub-sectioning of a 3d
array
> dim(arr)
[1] 245 175 150
For each point in the array I am trying to calculate the mean of the values
in its Dear list
I 'm writing Rd files and I 'd like to have a list inside the description of
an argument
(...)
\arguments{
(...)
\item{bootmethod}{vector of strings defining the methods used for
Hi all
I have a simple question
I have a data.frame like this
id x y
1 50 1647685 4815259
2 50 1647546 4815196
3 50 1647454 4815294
4 50 1647405 4815347
5 50 1647292 4815552
6 Dear R-helpers
If you know of an extended example of the use of R2HTML in which the
various constructs are present in one place could you please point
me to it or send it to me?
______________Apologies for cross-posting
There are two places available on a 3-day R course in Newburgh UK
(28-30 August 2006).
Full details can be found at www.brodgar.com
Kind regards
Alain Zuur
HighlaHi all
I am trying to find estimates for 7 parameters of a model which should fit
real data. I have a function for the negative log likelihood (NLL) of the
data. With optim(method "L-BFGS-B " loweHallo
Ich bin auf der Suche nach umgesetzten evolutionären Algorithmen in R. Leider habe ich kein entsprechendes Package oder Funktionen dieser Verfahrensgruppe gefunden. Weiß zufällig jemand ob
Dear all
I have two questions regarding trellis plots - which I hope you may be able to help me with.
Is it possible to place the key in a trellis plot on the panel (instead of beside the panel)? T |
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