Dear All
I am trying to study four-way interactions in an ANOVA problem.
However, qqnorm+qqline result
(at http://phhs80.googlepages.com/qqnorm.png)
is not promising regarding the normality of data (960 observations).
The result of Shapiro-Wilk test is also not encouraging:
W = 0.9174, p-value
On 7/27/06, Frank E Harrell Jr [EMAIL PROTECTED] wrote:
I am trying to study four-way interactions in an ANOVA problem.
However, qqnorm+qqline result
(at http://phhs80.googlepages.com/qqnorm.png)
is not promising regarding the normality of data (960 observations).
The result of
On 7/27/06, Frank E Harrell Jr [EMAIL PROTECTED] wrote:
Tony Lachenbruch has written some about this, also see my book (it's web
page is biostat.mc.vanderbilt.edu/rms). I don't know about the power of
interaction tests, but for main effect tests in the absence of
interaction, the Wilcoxon
Dear All
I am trying to use Levene's test (of package car), but I do not
understand quite well how to use it. '?levene.test' does not
unfortunately provide any example. My data are in a data frame and
correspond to 4 factors plus response. Could someone please give me an
example about how to use
On 8/2/06, John Fox [EMAIL PROTECTED] wrote:
The argument y is the response variable and group is a factor defining
groups (as ?levene.test says). If you have more than one factor, then you
can use interaction() to create from them a factor with levels given by the
product set of the levels of
On 8/3/06, John Fox [EMAIL PROTECTED] wrote:
Levene's test tests the null hypothesis that the variance are equal, so a
small p-value suggests that they are not. Looking at your output, it seems
odd that you have as many as 96 groups.
Thanks again, John. I have 4 factors with 3, 4, 4 and 2
Dear All
My data consists in 96 groups, each one with 10 observations. Levene's
test suggests that the variances are not equal, and therefore I have
tried to apply the classical transformations to have homocedasticity
in order to be able to use ANOVA. Unfortunately, no transformation
that I have
On 03 Aug 2006 15:45:10 +0200, Peter Dalgaard [EMAIL PROTECTED] wrote:
My data consists in 96 groups, each one with 10 observations. Levene's
test suggests that the variances are not equal, and therefore I have
tried to apply the classical transformations to have homocedasticity
in order
On 03 Aug 2006 16:32:38 +0200, Peter Dalgaard [EMAIL PROTECTED] wrote:
My data consists in 96 groups, each one with 10 observations. Levene's
test suggests that the variances are not equal, and therefore I have
tried to apply the classical transformations to have homocedasticity
in
Thanks to all contributors for the fruitfulness of this discussion. I
am speculating about a simpler solution: to use a non-parametric
approach. To avoid the requirement of having normal residuals, Frank
Harrell has suggested here the following non-parametric procedure:
library(Design) # also
On 8/7/06, Xin [EMAIL PROTECTED] wrote:
I try to export my output's data to Excel spreadsheet. My outputs are:
comb3
[,1] [,2] [,3]
[1,] a b c
[2,] a b d
[3,] a b e
[4,] a b f
[5,] a b g
See
? write.table
? write.csv
Paul
On 8/13/06, Michael Zatorsky [EMAIL PROTECTED] wrote:
I'm working on producing a simple cumulative frequency
distribution.
Thanks to the help of the good people on this list I
now have four vectors that I'd like to join/relate
into a table. e.g.
v1 - myHistogram$breaks #
On 8/14/06, yohannes alazar [EMAIL PROTECTED] wrote:
I have a data in two columns and how can i convert it to one row . thank you
in advance
inpute
1 2
3 4
5 6
7 8
9 1
out put
1 2 3 4 5 6 7 8 9 1
An example follows:
input - matrix(1:10,5,2)
input
[,1] [,2]
[1,]16
On 8/16/06, Óttar Ísberg [EMAIL PROTECTED] wrote:
I may be guilty of not doing my homework, but still, I've searched. I'm a
relative newcomer to R (my forte is at present MATLAB, but for various
reasons I'm trying to get literate in R). My question is: Is there an
autocompletion feature buried
On 8/16/06, Óttar Ísberg [EMAIL PROTECTED] wrote:
That was quick, and thanks. I'm afraid I wasn't precise enough. I'm using
Windows XP and by autocompletion I mean typing the first few letters of a
command and then have the system either complete the command or give you
possible options, as in
On 8/18/06, Correia, L, Mr [EMAIL PROTECTED] [EMAIL PROTECTED] wrote:
To whom it may concern:
I am trying a factorial design a system of mine that has two factors.
Each factor was set at four different levels, with one replication for
each of the combinations. My data is as follows:
On 8/24/06, Muhammad Subianto [EMAIL PROTECTED] wrote:
I have a dataset (20 columns 1000 rows) which
some of columns have the same value and the others
have different values.
Here are some piece of my dataset:
obj - cbind(c(1,1,1,4,0,0,1,4,-1),
c(0,1,1,4,1,0,1,4,-1),
Dear All
Can R compute the expected value of a random variable?
Thanks in advance,
Paul
__
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https://stat.ethz.ch/mailman/listinfo/r-help
PLEASE do read the posting guide http://www.R-project.org/posting-guide.html
On 8/26/06, Mike Nielsen [EMAIL PROTECTED] wrote:
Yes.
Can R compute the expected value of a random variable?
Mike: thank you very much indeed for your so insightful and complete
answer. I have meanwhile deepened my research and, as a consequence,
I have found the following solution, which
On 8/30/06, Mark Lyman [EMAIL PROTECTED] wrote:
I have a problem with apply function. I have to two matrices of dimension of
one column but n rows. I have to check whether one matrix is greater than
other by going thru each row (ie) using if condition to check one matrix
with another
Dear All
I am trying to fit Pareto distribution to some data. MASS package does
not support Pareto distribution. Is there some alternative way?
Thanks in advance,
Paul
__
R-help@stat.math.ethz.ch mailing list
On 9/3/06, Prof Brian Ripley [EMAIL PROTECTED] wrote:
I am trying to fit Pareto distribution to some data. MASS package does
not support Pareto distribution. Is there some alternative way?
Actually fitdistr{MASS} does if you supply the pdf for a Pareto.
That is not in base R, but easy to
, at 10:55 AM, Paul Smith wrote:
Dear All
I am trying to fit Pareto distribution to some data. MASS package does
not support Pareto distribution. Is there some alternative way?
Thanks in advance,
Paul
__
R-help@stat.math.ethz.ch
Dear All
Is there some way of exporting R plots to epslatex, i.e., to a file
with the eps file and another one with the LaTeX commands
(representing the text in the plots), likewise Gnuplot does? If so,
could you please indicate it to me?
Thanks in advance,
Paul
On 9/12/06, Prof Brian Ripley [EMAIL PROTECTED] wrote:
Is there some way of exporting R plots to epslatex, i.e., to a file
with the eps file and another one with the LaTeX commands
(representing the text in the plots), likewise Gnuplot does? If so,
could you please indicate it to me?
R
On 9/12/06, Ethan Johnsons [EMAIL PROTECTED] wrote:
A quick question, please!
How do you extract a certain value of vector?
i.e. x = c(2,5,3,6,21,3,6,24, )
How do you get the 1st one (which is 2); the 5th one (which is 21); etc?
Simple, Ethan:
x[1], x[5], ...
Paul
On 9/12/06, Anupam Tyagi [EMAIL PROTECTED] wrote:
R has an xfig driver, and AFAIK you can do this from xfig.
Is there an xfig port for Windows, without cygwin? If so, I will be thankful
for
a pointer to the where it can be downloaded from. I have been looking for it
for
some time.
Dear All
When drawing a classification tree with
plot(mytree)
text(mytree)
the conditions are written just before the nodes branch. My question
is: can one be certain that those conditions refer to the left-side
branches? (The R documentation surprisingly lacks the information that
I am asking
On 5/18/06, Carlos Ortega [EMAIL PROTECTED] wrote:
Are you referring to ?:
- library(tree)
- library(rpart)
On 5/18/06, Paul Smith [EMAIL PROTECTED] wrote:
Dear All
When drawing a classification tree with
plot(mytree)
text(mytree)
the conditions are written just before the nodes
On 5/18/06, Carlos Ortega [EMAIL PROTECTED] wrote:
Yes, that is right.
The conditions on top of the branches refer to the left-hand side.
Thanks, Carlos. Then, it should be explicitly said in ? text.rpart.
Paul
__
R-help@stat.math.ethz.ch mailing
Dear All
I am totally new to R and I would like to know whether R is able and
appropriate to illustrate to my students the Central Limit Theorem,
using for instance 100 independent variables with uniform distribution
and showing that their sum is a variable with an approximated normal
On 4/23/05, Matthias Kohl [EMAIL PROTECTED] wrote:
here is another idea to illustrate the Central Limit Theorem which is
based on our package distr.
Thanks to all for your numerous suggestions. Since I am just beginning
with R, it will take a while before I can fully digest your help.
Have a
Dear All
Is there some way of restarting R, without quitting R? In other words,
I am looking for something like the commands reset (MuPAD) or restart
(Maple).
Thanks in advance,
Paul
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R-help@stat.math.ethz.ch mailing list
On 4/23/05, Uwe Ligges [EMAIL PROTECTED] wrote:
Is there some way of restarting R, without quitting R? In other words,
I am looking for something like the commands reset (MuPAD) or restart
(Maple).
No, but of course you could write a function that fires up a new
instance of R and quits
On 4/26/05, Uwe Ligges [EMAIL PROTECTED] wrote:
(Sorry if the question has already been answered.)
Could someone please suggest a good text editor for
writing R sources ?
(I know emacs exists ... but I find it a bit heavy).
I use crimson (http://www.crimsoneditor.com) which is
small
On 4/26/05, Liaw, Andy [EMAIL PROTECTED] wrote:
(Sorry if the question has already been answered.)
Could someone please suggest a good text editor for
writing R sources ?
(I know emacs exists ... but I find it a bit heavy).
I use crimson (http://www.crimsoneditor.com) which is
Dear All
I would like to draw a picture with the density curve of a normal
distribution over a histogram of a set of random numbers extracted
from the same normal distribution. Is that possible?
Thanks in advance,
Paul
__
R-help@stat.math.ethz.ch
On 4/27/05, Achim Zeileis [EMAIL PROTECTED] wrote:
I would like to draw a picture with the density curve of a normal
distribution over a histogram of a set of random numbers extracted
from the same normal distribution. Is that possible?
To quote Simon `Yoda' Blomberg: This is R. There is
Dear All
I would like to know whether it is possible with R to define a
discrete random variable different from the ones already defined
inside R and generate random numbers from that user-defined
distribution.
Thanks in advance,
Paul
__
On 5/1/05, Matthias Kohl [EMAIL PROTECTED] wrote:
I would like to know whether it is possible with R to define a
discrete random variable different from the ones already defined
inside R and generate random numbers from that user-defined
distribution.
Yes. One generic way is to specify the
Dear All
Is there some command to add two vectors?
Thanks in advance,
Paul
__
R-help@stat.math.ethz.ch mailing list
https://stat.ethz.ch/mailman/listinfo/r-help
PLEASE do read the posting guide! http://www.R-project.org/posting-guide.html
On 5/3/05, Josef Eschgfaeller [EMAIL PROTECTED] wrote:
Is there some command to add two vectors?
x+y
Thanks a lot, Josef.
Paul
__
R-help@stat.math.ethz.ch mailing list
https://stat.ethz.ch/mailman/listinfo/r-help
PLEASE do read the posting guide!
Dear All
I would like to know whether it is possible with R to get the
mathematical expression of the density of a sum of two independent
continuous random variables.
Thanks in advance,
Paul
__
R-help@stat.math.ethz.ch mailing list
Dear All
I would like to get the histogram for the following model with
discrete and continuous random variables:
* with probability 1/3, a random number is drawn from the continuous
uniform distribution (min=0, max=1);
* with probability 2/3, a random number is drawn from a different
continuous
On 5/5/05, Spencer Graves [EMAIL PROTECTED] wrote:
Have you considered package distr? It will do something similar
to
what you request, I think; it may or may not be adequate for your
purposes.
Thanks, Spencer and Duncan. Maybe, the best choice is to use Maple or
MuPAD for that.
Dear All
For my calculations, I am needing to use more floating-point precision
than the default one of R. Is that possible? And, if yes, how?
Thanks in advance,
Paul
__
R-help@stat.math.ethz.ch mailing list
On 11/16/06, Prof Brian Ripley [EMAIL PROTECTED] wrote:
For my calculations, I am needing to use more floating-point precision
than the default one of R. Is that possible? And, if yes, how?
See package gmp (but that will be slow and cumbersome for all but simple
calculations).
The real
Dear All
I have just installed the package Ryacas, but getting the following:
library(Ryacas)
Loading required package: XML
yacas(1/2 * 3/4)
[1] Starting Yacas!
Error in socketConnection(host = 127.0.0.1, port = 9734, server = FALSE, :
unable to open connection
In addition: Warning
On 11/19/06, Gabor Grothendieck [EMAIL PROTECTED] wrote:
Checkout the INSTALLATION - UNIX and TROUBLESHOOTING
sections of the home page:
http://code.google.com/p/ryacas/
I have just installed the package Ryacas, but getting the following:
library(Ryacas)
Loading required package: XML
On 11/19/06, Gabor Grothendieck [EMAIL PROTECTED] wrote:
You might try posting your problem on the comp.os.linux.networking
group since it appears to be a configuration problem with telnet
on your machine.
Thanks, Gabor. I am going to do that and I will let you know about the result.
Paul
On 19 Nov 2006 16:11:52 +0100, Peter Dalgaard [EMAIL PROTECTED] wrote:
Paul Smith [EMAIL PROTECTED] writes:
On 11/19/06, Gabor Grothendieck [EMAIL PROTECTED] wrote:
You might try posting your problem on the comp.os.linux.networking
group since it appears to be a configuration problem
On 11/19/06, Gabor Grothendieck [EMAIL PROTECTED] wrote:
Sorry but there is not much else I can tell you. I don't have a UNIX system
myself though I do know that others have used Ryacas on UNIX since the notes
on the home page are based, in part, on their feedback of successfully using
it on
On 11/19/06, Gabor Grothendieck [EMAIL PROTECTED] wrote:
Sorry but there is not much else I can tell you. I don't have a UNIX
system
myself though I do know that others have used Ryacas on UNIX since the
notes
on the home page are based, in part, on their feedback of successfully
On 11/19/06, Marc Schwartz [EMAIL PROTECTED] wrote:
OK, after digging around for a couple of hours on this, thinking that
this might be a firewall/SELinux/On Demand Services problem, I have, I
think, nailed it down to two key things on FC6:
1. It requires the use of the '--enable-server'
On 11/19/06, Gabor Grothendieck [EMAIL PROTECTED] wrote:
Thanks, Marc. I have placed a link to your post on the Ryacas home page.
Also, Ryacas 0.2-3 is now on Omegahat (as well as google groups).
Apparently, the link
HowTo - Enable Telnet on Linux
at Ryacas site is misleading, as it suggests
Dear All
I am trying to convert from the type expression to the type
numeric. The following works:
x - expression(6.2)
as.numeric(as.character(x))
[1] 6.2
However, the following does not work:
x - expression(62/100)
as.numeric(as.character(x))
[1] NA
Warning message:
NAs introduced by
On 11/23/06, Barry Rowlingson [EMAIL PROTECTED] wrote:
x - expression(62/100)
as.numeric(as.character(x))
[1] NA
Warning message:
NAs introduced by coercion
Any idea about how to deal with the second case?
eval-uate the expression:
x - expression(62/100)
eval(x)
[1]
On 23 Nov 2006 18:20:17 +0100, Peter Dalgaard [EMAIL PROTECTED] wrote:
I am trying to convert from the type expression to the type
numeric. The following works:
x - expression(6.2)
as.numeric(as.character(x))
[1] 6.2
However, the following does not work:
x -
Dear All
I am doing the following:
x - yacas(3/2)
for (i in 2:400)
+x - yacas(paste(x,*,x))
x
expression(Inf^1.260864167e+117/Inf^6.304320836e+116)
Eval(x)
[1] NaN
No luck this way. However, I am successful with
y - yacas((3/2)^400)
y
On 23 Nov 2006 20:17:15 +0100, Peter Dalgaard [EMAIL PROTECTED] wrote:
I am doing the following:
x - yacas(3/2)
for (i in 2:400)
+x - yacas(paste(x,*,x))
x
expression(Inf^1.260864167e+117/Inf^6.304320836e+116)
Eval(x)
[1] NaN
No luck this way. However, I am successful
On 11/19/06, Marc Schwartz [EMAIL PROTECTED] wrote:
this might be a firewall/SELinux/On Demand Services problem, I have, I
think, nailed it down to two key things on FC6:
1. It requires the use of the '--enable-server' configure option for
yacas itself.
2. There is a directory permissions
On 11/25/06, Gabor Grothendieck [EMAIL PROTECTED] wrote:
Ryacas starts up yacas with an initialization file R.ys which puts
the server in a mode which outputs XML (which is what Ryacas reads).
It does that by specifying --init /whatever/R.ys on the yacas command line
when it is run.
You can
Dear All
I would like to use rpart to obtain a regression tree for a dataset
like the following:
Y X1 X2 X3 X4
5.500033B A 3 2
0.35625148 D B 6 5
0.8062546 E C 4 3
5.100014C A 3
On 1/23/07, Prof Brian Ripley [EMAIL PROTECTED] wrote:
I would like to use rpart to obtain a regression tree for a dataset
like the following:
Y X1 X2 X3 X4
5.500033 B A 3 2
0.35625148D B 6 5
0.8062546 E C
On 2/4/07, Sasha Goodman [EMAIL PROTECTED] wrote:
Oh, I almost forgot:
The search engine is at:
http://www.rseek.org
--Sasha
On 2/3/07, Sasha Goodman [EMAIL PROTECTED] wrote:
Hello all,
I wanted to announce a new R search engine I made that covers all the
major R mailing lists,
Is there an R function to generate random integers? Thanks in advance.
For example, if you want 5 random integers from the sequence 1:50, you
can do the following:
sample(1:50,5)
Paul
__
R-help@stat.math.ethz.ch mailing list
Dear All
I am trying to install iWidgetsRGtk (on a Linux machine), but getting
the following error:
install.packages(iWidgetsRGtk,repos=http://www.math.csi.cuny.edu/pmg;)
Warning in download.packages(unique(pkgs), destdir = tmpd, available =
available, :
no package 'iWidgetsRGtk' at
On 4/4/07, Michael Lawrence [EMAIL PROTECTED] wrote:
iWidgetsRGtk is an obsolete package. Instead, install gWidgetsRGtk from
CRAN. That's g not i.
Thanks, Michael. That is solved now.
Paul
On 4/4/07, Paul Smith [EMAIL PROTECTED] wrote:
Dear All
I am trying to install iWidgetsRGtk
On 4/6/07, José Luis Aznarte M. [EMAIL PROTECTED] wrote:
Hi! Maybe this is a silly question, but I need the column rank
(http://en.wikipedia.org/wiki/Rank_matrix) of a matrix and R function
'rank()' only gives me the ordering of the elements of my matrix.
How can I compute the column
Dear All
Suppose a sequence of length 10 generated by the following rule: the
first element is 0 with 50% of probability or 1 with the same
probability; the second element likewise; and so on.
Is there some R command to obtain all possible different sequences
formed by the above rule? I am aware
On 4/17/07, Robin Hankin [EMAIL PROTECTED] wrote:
f - function(n){expand.grid(rep(list(0:1),n))}
f(10)
[snip]
Thanks, Robin, that is it!
Paul
On 17 Apr 2007, at 15:26, Paul Smith wrote:
Dear All
Suppose a sequence of length 10 generated by the following rule: the
first element
Dear All
I am trying to perform the below optimization problem, but getting
(0.5,0.5) as optimal solution, which is wrong; the correct solution
should be (1,0) or (0,1).
Am I doing something wrong? I am using R 2.5.0 on Fedora Core 6 (Linux).
Thanks in advance,
Paul
even slightly you will have no problem.
Paul Smith
[EMAIL PROTECTED]
To
Sent by: R-help r-help@stat.math.ethz.ch
[EMAIL PROTECTED
On 5/7/07, Paul Smith [EMAIL PROTECTED] wrote:
I think the problem is the starting point. I do not remember the details
of the BFGS method, but I am almost sure the (.5, .5) starting point is
suspect, since the abs function is not differentiable at 0. If you perturb
the starting point
/agingandhealth/People/Faculty/Varadhan.html
-Original Message-
From: [EMAIL PROTECTED]
[mailto:[EMAIL PROTECTED] On Behalf Of Paul Smith
Sent: Monday, May 07, 2007 6:26 PM
To: R-help
Subject: Re: [R] Bad
for your function is singular, it has eigenvalues of 0
and 2. In short, there is no substitute to using your analytic powers!
Ravi.
- Original Message -
From: Paul Smith [EMAIL PROTECTED]
Date: Tuesday, May 8, 2007 4:33 am
Subject: Re: [R] Bad optimization solution
To: R-help r-help
Dear All
I am using rgenoud to solve the following maximization problem:
myfunc - function(x) {
x1 - x[1]
x2 - x[2]
if (x1^2+x2^2 1)
return(-999)
else x1+x2
}
genoud(myfunc, nvars=2,
Domains=rbind(c(0,1),c(0,1)),max=TRUE,boundary.enforcement=2,solution.tolerance=0.01)
How
Dear All
I am dealing at the moment with optimization problems with nonlinear
constraints. Regenoud is quite apt to solve that kind of problems, but
the precision of the optimal values for the parameters is sometimes
far from what I need. Optim seems to be more precise, but it can only
accept
===
Paul Smith writes:
Dear All
I am using rgenoud to solve the following maximization problem:
myfunc - function(x) {
x1 - x[1]
x2 - x[2]
if (x1^2+x2^2 1)
return(-999)
else x1+x2
}
genoud(myfunc, nvars=2,
Domains=rbind(c(0,1),c(0,1)),max=TRUE
===
Paul Smith writes:
Thanks, Jasjeet, for your reply, but maybe I was not enough clear.
The analytical solution for the optimization problem is the pair
(sqrt(2)/2,sqrt(2)/2),
which, approximately, is
(0.707106781186548,0.707106781186548).
The solution provided
.
Starting from a solution given by Rgenoud or its ilk is probably
a good idea.
Patrick Burns
[EMAIL PROTECTED]
+44 (0)20 8525 0696
http://www.burns-stat.com
(home of S Poetry and A Guide for the Unwilling S User)
Paul Smith wrote:
Dear All
I am dealing at the moment
Dear All,
I am using constrOptim, but facing a difficulty: how can I get the
starting value? Is there some automatic way of getting it? Since I
have many inequalities as constraints (all linear), it is quite
difficult to find a feasible value. I have tried to use rgenoud
solution as a feasible
Dear All,
I am trying to solve the following maximization problem, but I cannot
have rgenoud giving me a reliable solution.
Any ideas?
Thanks in advance,
Paul
library(rgenoud)
v - 0.90
O1 - 10
O2 - 20
O0 - v*O1+(1-v)*O2
myfunc - function(x) {
U0 - x[1]
U1 -
that the solution is
right. That is why I am trying to get a solution with rgenoud, but
unsuccessfully until now.
Paul
-Original Message-
From: [EMAIL PROTECTED]
[mailto:[EMAIL PROTECTED] On Behalf Of Paul Smith
Sent: Tuesday, July 03, 2007 4:10 PM
To: R-help
Subject: [R] Fine
-
From: [EMAIL PROTECTED]
[mailto:[EMAIL PROTECTED] On Behalf Of Paul Smith
Sent: Tuesday, July 03, 2007 5:10 PM
To: R-help
Subject: Re: [R] Fine tunning rgenoud
On 7/3/07, Ravi Varadhan [EMAIL PROTECTED] wrote:
You had indicated in your previous email that you are having trouble
finding
by constrOptim is not interior; the gradient is not equal to
zero.
Paul
-Original Message-
From: [EMAIL PROTECTED]
[mailto:[EMAIL PROTECTED] On Behalf Of Paul Smith
Sent: Tuesday, July 03, 2007 5:10 PM
To: R-help
Subject: Re: [R] Fine tunning rgenoud
On 7/3/07, Ravi Varadhan
, but it works in many cases.
Paul
- Original Message -
From: Paul Smith [EMAIL PROTECTED]
Date: Tuesday, July 3, 2007 7:32 pm
Subject: Re: [R] Fine tunning rgenoud
To: R-help r-help@stat.math.ethz.ch
On 7/4/07, Ravi Varadhan [EMAIL PROTECTED] wrote:
It should be easy enough
0.00136226156979156 2.47224893929883e-11
0.00121959537442013 0.00249964872330666 1.58514632925203e-05
0.213308634647407
- Original Message -
From: Paul Smith [EMAIL PROTECTED]
Date: Wednesday, July 4, 2007 6:00 am
Subject: Re: [R] Fine tunning rgenoud
To: R-help
On 7/4/07, Paul Smith [EMAIL PROTECTED] wrote:
On 7/4/07, RAVI VARADHAN [EMAIL PROTECTED] wrote:
My point is that it might be better to try multiple (feasible) starting
values for constrOptim to ensure that you have a good local minimum, since
it appears that constrOptim converges
On 7/16/07, massimiliano.talarico [EMAIL PROTECTED] wrote:
I need a suggest to obtain the max of this function:
Max x1*0.021986+x2*0.000964+x3*0.02913
with these conditions:
x1+x2+x3=1;
radq((x1*0.114434)^2+(x2*0.043966)^2+(x3*0.100031)^2)=0.04;
x1=0;
x1=1;
x2=0;
x2=1;
x3=0;
x3=1;
On 8/2/07, André Rossi [EMAIL PROTECTED] wrote:
I'm using the function constrOptim together with the SANN method and
my objective function (f) has two parameters. One of the parameters
needs be into (2^(-10), 2^4) range and the other into (2^(-2), 2^12)
range. How can I do it using
On 8/2/07, Paul Smith [EMAIL PROTECTED] wrote:
I'm using the function constrOptim together with the SANN method and
my objective function (f) has two parameters. One of the parameters
needs be into (2^(-10), 2^4) range and the other into (2^(-2), 2^12)
range. How can I do it using
Dear All,
Is there some package to do optimal control?
Thanks in advance,
Paul
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R-help@stat.math.ethz.ch mailing list
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PLEASE do read the posting guide http://www.R-project.org/posting-guide.html
and
On 8/20/07, nalluri pratap [EMAIL PROTECTED] wrote:
try
library(numDeriv)
?genD
Pratap
Shubha Vishwanath Karanth [EMAIL PROTECTED] wrote:
Hi,
Could anyone tell me what is the command used in R to do
1. Differentiation
2. Newton Raphson method (Numerical Analysis in
On 8/22/07, Søren Højsgaard [EMAIL PROTECTED] wrote:
I have a function and a vector, say
f - function(a,b){a+b}
x - c(2,3)
I want to evaluate f on x in the sense of computing f(x[1],x[2]). I would
like it to be so that I can write f(x). (I know I can write a wrapper
function g -
On 8/23/07, Bart Joosen [EMAIL PROTECTED] wrote:
Maybe this is more a programming questions than a specific R-project
question, but maybe there is someone who can point me in the right direction.
I have a picture of cirkels which I took with a digital camera.
Now I want to use the diameter
On 8/29/07, D. R. Evans [EMAIL PROTECTED] wrote:
The subject says it all really: I've tried hitting control-C (multiple
times), but that doesn't seem to be a reliable way to interrupt a long
calculation. What is the right way to interrupt a calculation that has
been proceeding for several
Dear All,
I am trying to write my first R script. The code is simply
cat(Hello!\n)
However, when I run
$ R CMD BATCH myscript.R
I do not see Hello! on the console. I am using Fedora 7 (Linux) and R-2.5.1.
Any ideas?
Thanks in advance,
Paul
__
On 8/30/07, Barry Rowlingson [EMAIL PROTECTED] wrote:
I am trying to write my first R script. The code is simply
cat(Hello!\n)
However, when I run
$ R CMD BATCH myscript.R
I do not see Hello! on the console. I am using Fedora 7 (Linux) and
R-2.5.1.
Any ideas?
You
On 8/30/07, Vladimir Eremeev [EMAIL PROTECTED] wrote:
Use rscript
Rscript myscript.R
or
Rscript -e 'cat(Hello!\n)'
will show Hello! on the console.
R CMD BATCH writes its output to the file myscript.Rout
Thanks, Vladimir. Rscript is exactly what I was looking for!
Paul
Paul Smith
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