Dear r-helpers!
I am kind of new to R.
I would like to calculate the mean of the numbers of this expression:
data(USArrests)
USArrests[row.names(M) == Alabama,]
class() tells me it's a ``data.frame,'' what I actually desire is to get
all numbers of a row as a vector or a list to let
rowMeans(mydf) will do this for a data frame mydf.
Be careful though to use it only with all-numeric data frames (there is an
implicit as.matrix going on), and often it makes more sense to store such
data in a matrix.
apply(mydf, 1, mean) would also work, but is slower.
On Wed, 17 Dec 2003,
On Tue, 16 Dec 2003, Gabor Grothendieck wrote:
My personal view on this is that there is need for a friendly
list with a more customer service attitude than r-help.
This is not a balanced view. In a project like ours, you really do need to
put participation in balance. If you don't offset
On Wed, Dec 17, 2003 at 08:27:41AM +0100, Sven C. Koehler wrote:
I am kind of new to R.
I would like to calculate the mean of the numbers of this expression:
data(USArrests)
USArrests[row.names(M) == Alabama,]
class() tells me it's a ``data.frame,'' what I actually desire is to
Hi all,
I have a strange problem and rigth now I can't figure out a
solution.
Trying to calculate an ANOVA with one between subject factor (group)
and one within (hemisphere). My dependent variable is source
localization (data). My N = 25.
My data.frame looks like this:
ML.dist.stack
Thanks, you've helped me alot!
-S.
On Wed, Dec 17, 2003 at 09:43:44AM +0100, Philipp Pagel wrote:
rowMeans(USArrest)
does what you want.
__
[EMAIL PROTECTED] mailing list
https://www.stat.math.ethz.ch/mailman/listinfo/r-help
Running lme on your data set results exactly in what you expect - or do
you expect something different?
Pascal
L1-factor(F1f)
L2-factor(F2f)
L3-factor(F3f)
lme(value ~ 1,random = ~ 1 | L1/L2/L3)
Linear mixed-effects model fit by REML
Data: NULL
Log-restricted-likelihood: 438.9476
Fixed:
You have an NA in your data, it says. That makes the design unbalanced
(it it is not already unbalanced by having 50 obs with a 2x2
classification: I can't see the pattern from your extract but guess 25
subjects don't divide into two equal groups).
That you get the same effects in both strata
When I alter the levels of a factor, why does it alter the names too?
f - factor(c(A=one,B=two,C=one,D=one,E=three),
levels=c(one,two,three))
names(f)
-- gives [1] A B C D E
levels(f) - c(un,deux,trois)
names(f)
-- gives NULL
I'm using R 1.8.0 for Windows.
Damon.
--- Andrew Criswell [EMAIL PROTECTED] wrote:
...
My search on Amazon fails to locate the book Brandon
mentions,
Resampling: The New Statistics. Is there more
information on Author,
ISBN, etc.?
FYI, try
http://www.resample.com/content/text/index.shtml
or
the main site at
After thinking this over, I think it's a good idea to have the beginner
list (and I have subscribed).
While I greatly appreciate this list, and the tremendous amount of help
I've gotten from it, the style of this list is, usually, to give fairly
short replies (e.g. try ?function) This is fine.
Dear all,
I would like to raise the question regarding the Intel Itanium processors. Is
anyone using them in 64bit mode? I am mostly interested in memory-consuming
applications, e.g. the normalization of a large number of microarrays.
Andy Liaw told me that he is using R on a dual AMD Opteron
See ?winDialog and the See Also section there. Maybe that would suffice
for your purpose.
HTH,
Andy
From: Mehdi Kadiri
Hello evry one,
I'm a frensh consulting Engineer in statistics and i work
under R times to
times.
I would like to build an Graphic User Interface as we can do
under
Gabor Grothendieck wrote:
My personal view on this is that there is need for a friendly
list with a more customer service attitude than r-help.
God save us from a ``customer service attitude'' --- bland,
fatuous, feel-good useless twaddle! If you want a ``custome
service'' attitude go and
On 17-Dec-03 Peter Flom wrote:
After thinking this over, I think it's a good idea to have the beginner
list (and I have subscribed).
[...]
What do others think? Has anyone else subscribed to the beginner list
yet?
Peter
Perhaps there has now been enough discussion of whether such a
On Tue, 16 Dec 2003, Gary Allison wrote:
Hi all,
I didn't get a response to my post of this issue a week ago, so I've
tried to clarify:
When I use lme to analyze a model of nested random effects, the variance
estimates of levels higher in the hierarchy appear to have much more
variance
Hi all,
I tried to save a complete log of a R session we had in a seminar
today... but I didn't succeed.
1) R | tee session.log
This saves both input and output, but I do get the cursor key escape
sequences from editing (cursor-up to get last command etc) instead of
the actual command line
Greetings all,
In follow up to this thread (I am copying all participants), I want to
provide some additional data.
In review, Peter Flom the original poster, received the following
warning message when using read.spss() to import a .SAV format SPSS data
set into R:
Warning message:
Thomas Lumley [EMAIL PROTECTED] writes:
On Tue, 16 Dec 2003, Gary Allison wrote:
Hi all,
I didn't get a response to my post of this issue a week ago, so I've
tried to clarify:
When I use lme to analyze a model of nested random effects, the variance
estimates of levels higher in the
Pascal == Pascal A Niklaus [EMAIL PROTECTED]
on Wed, 17 Dec 2003 16:52:07 +0100 writes:
Pascal Hi all,
Pascal I tried to save a complete log of a R session we had in a seminar
Pascal today... but I didn't succeed.
Pascal 1) R | tee session.log
Pascal This saves both
I agree that
- wikis (see the successful one for the lua programming
language at: http://lua-users.org/wiki/ )
- forums
are nice. Actually someone did set up an R wiki some time
ago at:
http://fawn.unibw-hamburg.de/cgi-bin/Rwiki.pl?RwikiHome
yet no one really used it. Some critical
I completely agree with Frank Harrell's suggestion that email is
a problem for beginners (who often don't know about the various
searchable archives, or find them overwhelming because the
massive amount that they contain, much of which is bound to be
irrelevant or too advanced).
I don't think a
Mehdi Kadiri wrote:
Hello evry one,
I'm a frensh consulting Engineer in statistics and i work under R times to
times.
I would like to build an Graphic User Interface as we can do under MS Excel
but i don't know how to do it.
If you want to program the interface in VB, you can use the tools in
Hello,
Roger Bivand wrote:
appropriate light. One basic characteristic seems to be that if the
question does indicate seriousness about trying to analyse data, respect
for the task at hand, then predictably lots of good advice comes quickly.
yes, I also experienced that (from the questioner
Dear All!
Tomorrow morning I will have to demonstrate R to a professor here at the
Semmelweis University. He uses Windows and Statistica. I will have 20
minutes and I would like to convince him that R is powerful, and it even
could be used in teaching the students basic medical statistics.
Could
Hello,
On Wednesday 17 December 2003 05:43, Gabor Grothendieck wrote:
My personal view on this is that there is need for a friendly
list with a more customer service attitude than r-help.
well that sounds for me like a shop - customer service- ;-) and that's what
R should not become, in my
Dear R-user,
there have been already a lot of discussion with some good points against such
a list and the opposite opinions as well.
Well, I would like to propose that we start a testing phase either with
- only internal membership, that means only people from this dept. + perhaps
some
Rolf Turner wrote:
Gabor Grothendieck wrote:
My personal view on this is that there is need for a friendly
list with a more customer service attitude than r-help.
God save us from a ``customer service attitude'' --- bland,
fatuous, feel-good useless twaddle! If you want a ``custome
In rereading this one idea occurred to me. What if the entire R help
system were turned into a wiki? That is,
?whatever
would take you to the help page, but not on your computer --
rather to the same page on the wiki. You would then find the
docs as they exist now plus the experiences of
Try the excellent canned demos that exist package. You can see a
complete list of all the packages you have:
demo(package = .packages(all.available = TRUE))
I'd certainly show the graphics demo.
HTH, Andy
-Original Message-
From: [EMAIL PROTECTED]
[mailto:[EMAIL PROTECTED] On Behalf Of
On 12/17/03 12:19, Gabor Grothendieck wrote:
In rereading this one idea occurred to me. What if the entire R help
system were turned into a wiki? That is,
?whatever
would take you to the help page, but not on your computer --
rather to the same page on the wiki. You would then find the
sorry, that's the problem if I do not check my mails before sending one - I
read the proposal of a wiki or forum and like these ideas, perhaps it is
better than a new mailing list.
Martin
P.S.: my summary of replies to the original idea where mainly based on
off-list mails, sorry I should
But this is a lot of work to set up. I'd rather take small
steps. I do plan to look into phpbb as an alternative to
bazookaboard*, but not today, and probably not tomorrow. So if
things proceed without me, so be it.
Or set up a server running Zope and Plone, and then you can have
wikis,
Peter Dalgaard wrote:
[snip]
Or, try looking at a smaller example where things can be worked out
explicitly: One-way ANOVA with random btw.group variation. Say 5
groups and 3 obs per group. If I got this right (please do check!),
the estimate of the between-group variance is 1/3 times the
Barry Rowlingson [EMAIL PROTECTED] writes:
But this is a lot of work to set up. I'd rather take small
steps. I do plan to look into phpbb as an alternative to
bazookaboard*, but not today, and probably not tomorrow. So if
things proceed without me, so be it.
Or set up a server running
Dear useRs,
I need of jacobian of a tranformation, R have this function?
If you use transform() on a response in my data structures (from my
rmutil library), the Jacobian is calculated automatically and stored
in the data structure. All my modelling functions then use it
automatically.
Hi all,
The last e-mails about beginners gave me the courage to post a question;
from a beginner's perspective, there are a lot of questions that I'm
tempted to ask. But I'm trying to find the answers either in the
documentation, either in the about 15 free books I have, either in the
help
From the file defining GetColNames:
/* GetRowNames and GetColNames are utility routines which
* locate and return the row names and column names from the
* dimnames attribute of a matrix. They are useful because
You have not applied them to the dimnames attribute. Extracting
dimnames
R users,
I recently upgraded (?) to Windows XP from 2000. I am trying to build an R
package. I have done this many times on my old system and I am not sure why
it is not working in XP.
To build the package I call a bat file that specifies all the necessary
paths -- but the build file
Dear Splus and R users:
I have a problem in fitting a NLME model, the error message is:
step halving factor reduced below minimum in PNLS step
What does it mean and how to fix the problem, could anyone help me
about it?
Any suggestion/help would be greatly appreciated.
Mei
Define function f to take a vector as input representing
a single input row. f should (1) transform this to a vector
representing the required row of output or else (2) produce
NULL if no row is to be output for that input row.
Then use this code where z is your input matrix:
t( matrix(
From: Gabor Grothendieck [EMAIL PROTECTED]
Date: Wed, 17 Dec 2003 15:02:49 -0500 (EST)
Define function f to take a vector as input representing
a single input row. f should (1) transform this to a vector
representing the required row of output or else (2) produce
NULL if no row is to
[EMAIL PROTECTED] writes:
Dear Splus and R users:
I have a problem in fitting a NLME model, the error message is:
step halving factor reduced below minimum in PNLS step
What does it mean and how to fix the problem, could anyone help me
about it?
Any suggestion/help would be greatly
This is just a response to the part where you refer to an apply
loop really being a for loop. In a sense this true, but
it should nevertheless be recognized that the apply solution
has a number of advantages over for:
- it nicely separates the problem into a single line that is
independent of
On 17 Dec 2003 at 12:51, Jonathan Baron wrote:
On 12/17/03 12:19, Gabor Grothendieck wrote:
In rereading this one idea occurred to me. What if the entire R help
system were turned into a wiki? That is,
?whatever
would take you to the help page, but not on your computer --
rather
Another way to approach this is to first massage the data into a more
regular format. This may or may not be simpler or faster than other
solutions suggested.
x - read.table(clipboard, header=T)
x
rel1 rel2 rel3 age0 age1 age2 age3 sex0 sex1 sex2 sex3
113 NA 25 232 NA
A two level solution might be possible as part of this too.
If you got ?whatever off your disk then it could contain a
link to the corresponding wiki page. If you didn't have
a connection you would still get what you get now but just
couldn't follow the link. Whenever a new version of R came
Tony Plate [EMAIL PROTECTED] writes:
xx - rbind(colnames-(x[,c(rel1,age0,age1,sex0,sex1)], nn),
+ colnames-(x[,c(rel2,age0,age2,sex0,sex2)], nn),
+ colnames-(x[,c(rel3,age0,age3,sex0,sex3)], nn))
PS. To advanced R users: Is the above usage of the colnames-
function within an
Thanks. As a follow-up question, is it considered acceptable programming
practice for - functions to modify their x argument?
-- Tony Plate
At Thursday 12:23 AM 12/18/2003 +0100, Peter Dalgaard wrote:
Tony Plate [EMAIL PROTECTED] writes:
xx -
I have empathy for lots of the points already made, more often on the life
is not always easy and you have to work at it flavour because that's where
you make the real gains.
One particular message early in the piece cited an example of what a good
request might look like. Other lists sometime
From: Tom Mulholland
I have empathy for lots of the points already made, more
often on the life
is not always easy and you have to work at it flavour because
that's where
you make the real gains.
One particular message early in the piece cited an example of
what a good
request
UseRs,
I used the optim function
valor.optim - optim(c(1,1,1),logexp1,method
=BFGS,control=list(fnscale=-1),hessian=T);
and I want to calculate the derivates,
psi1-valor.optim$par[1]
psi2-valor.optim$par[2]
psi3-valor.optim$par[3]
a0=exp(psi1);
The suggestions of Tom (posting guide) and Andy (Eric Raymond's How To Ask
Questions The Smart Way) are both good. Perhaps a good place to put an
actual posting guide and a link to Raymond's page would be at the page
pointed to by the link at the bottom of every posting to R-help (ie
On Wed, 17 Dec 2003, Savano S. Pereira wrote:
UseRs,
I used the optim function
valor.optim - optim(c(1,1,1),logexp1,method
=BFGS,control=list(fnscale=-1),hessian=T);
and I want to calculate the derivates, [ ... snip ... ]
but I found, [ ... snip ... ]
The derivates are zero. Why?
The fact that I've been using R for quite a while now and did not know
about this document is supporting evidence of the need to get this sort
of information out there.
However that big list is going to daunt some people, it would have
daunted me at the beginning. At a time when you are
Thanks to everyone who wrote in with suggestions. I will check out the
books mentioned.
The book I mentioned Resampling: The New Statistics is actually available
free online at:
http://www.resample.com/content/text/index.shtml
It seems pretty good as an introduction. But then again, I am new
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