Is there a R function for sort a data frame by a variable ?
I know sort a vector, but I don't know sort a data frame by a
column. Can you help me ?
the sort() function don't work with data frame.
__
R-help@stat.math.ethz.ch mailing list
On Thu, 31 Mar 2005, Sebastian Luque wrote:
I'm trying to make my R scripts more readable by others, so I searched for
some R programming conventions and found the following two:
- http://www.ci.tuwien.ac.at/Conferences/useR-2004/Keynotes/Maechler.pdf
- http://www.maths.lth.se/help/R/RCC
On Fri, 1 Apr 2005, Michael S wrote:
if I want to use stdout from other language as my R program input ,which is
the best way for design the API,using Pipe function or produce a temporary
file,using scan function to read the file ?
A file for portability, since pipes do not work well on
I am trying to generate kmean of 10 clusters for a 165 x 165 matrix.
i do not see any errors known to me. But I get this error on running the
script
Error: empty cluster: try a better set of initial centers
the commands are
M -matrix(scan(R_mutual,n = 165 * 165),165,165,byrow = T)
cl -
David Firth wrote:
Dear Johannes
I have noticed the same complaint, and you are right that it can be
unconnected with faulty S3 methods, etc., in your package.
For example, in my relimp package (current version 0.9-1, new on CRAN
today) the DESCRIPTION file has
Suggests: tcltk
and that works
dream == dream home [EMAIL PROTECTED]
on Wed, 30 Mar 2005 12:27:08 -0800 writes:
dream Dear R experts, Did someone implemented French Curve
dream yet? Or can anyone point me some papers that I can
dream follow to implement it?
Are you talking about splines ?
I vaguely
Dear all,
I need to do a automatic classification of a raster file (image) using
training samples. I would like to know if there is a library able to do
such a work.
Thanks
Emmanuel Poizot
__
R-help@stat.math.ethz.ch mailing list
Dear R users,
I have data on percentage leaf area damaged (in classes, e.g. 1%, 5%,
10%) in plants. My two questions are:
(1) Could I use a glm with poisson errors on these data?
(2) Could I still use this glm with poisson errors after arcsine
transformation of the data?
Thank you very much
On Fri, Apr 01, 2005 at 01:29:01AM +, Michael S wrote:
if I want to use stdout from other language as my R program input ,which is
the best way for design the API,using Pipe function or produce a temporary
file,using scan function to read the file ?
For the scan function, it makes no
Hi,
I try to fit a non linear regression by minimising the sum of the sum of
squares.
The model is number[2]-(x/number[1])^number[3]
Number [2] and number [1] change as the data changes but for all the set of
data number[3] must be identical.
I have 3 set of data (x1,y1), (x2,y2), (x3,y3).
Hi all
i'm trying to do some statistic on my data from neuronal
migration and i've to use anova and post-hoc test, does
someone have any tips'trick about a pdf file to read about ?
I've a control and five differents conditions and for every
condition i've a different number of data, am i on the
1)I have figures in a 3 rows and 3 columns. I tried to plot with:
postscript(trend_jfm.eps, horizontal=FALSE, onefile=TRUE)
I am getting the output cut. I am in linux (slackware) version 9 I think.
I have tried to add in some of the extra conditions like for A4 as in the
manual but still
I've just completed a package for generating numbers from the paraNormal
distribution. This is the distribution of numbers that you are currently
thinking of.
Sample usage:
rParaNorm(1)
[1] 3
- which is what I was thinking of when I pressed 'Return'.
for generating multiple numbers, a
Paul == Paul Murrell [EMAIL PROTECTED]
on Fri, 01 Apr 2005 10:45:16 +1200 writes:
Paul Hi Adaikalavan Ramasamy wrote:
Dear all,
I am trying to use hexbin and read the very interesting
article on grid (
I wish to perform brain surgery this afternoon at 4pm and don't know
where to start. My background is the history of great statistician
sports legends but I am willing to learn. I know there are courses and
numerous books on brain surgery but I don't have the time for those.
Please direct me
Hi
[thanks to everyone for advice on Recall() and sapply()]
The R FAQ section 2.8 discusses how to cite R in publications, but does
not (AFAICS) tell
me how to describe R in a sentence.
To wit, in my latest paper (destined for Rnews) one sentence reads:
The R programming language (3) has been
I've uploaded the R package perturb to CRAN. Perturb contains two
programs for evaluating collinearity. Colldiag calculates condition
indexes and variance decomposition proportions to detect and track
down collinear sets of variables.
Perturb takes a different approach. It re-estimates the model
You could do something like this
dataframe[order(dataframe$variable),]
-Original Message-
From: [EMAIL PROTECTED]
[mailto:[EMAIL PROTECTED] On Behalf Of Mario Morales
Sent: Thursday, March 31, 2005 10:23 PM
To: r-help@stat.math.ethz.ch
Subject: [R] a R function for sort a data frame.
dfr - data.frame(sample(1:50,10),sample(1:50,10))
colnames(dfr) - c(a,b)
dfr - dfr[order(dfr$a),]
dfr - dfr[order(-dfr$a),]
-Original Message-
From: Mario Morales [mailto:[EMAIL PROTECTED]
Sent: Thursday, March 31, 2005 10:23 PM
To: r-help@stat.math.ethz.ch
Subject: [R] a R function for
look at ?order(), e.g.,
dat[order(dat[,1]),]
will sort your data.frame wrt the first column.
I hope it helps.
Best,
Dimitris
Dimitris Rizopoulos
Ph.D. Student
Biostatistical Centre
School of Public Health
Catholic University of Leuven
Address: Kapucijnenvoer 35, Leuven, Belgium
Tel:
Hi,
x - data.frame(A=rnorm(10), B=round(runif(10,0,10)), C=rnorm(10))
#one way:
#increasing order
x.sort.in - x[order(x$B),]
x.sort.in
#decreasing order:
x.sort.de - x[rev(order(x$B)),]
x.sort.de
Best,
Matthias
-Ursprüngliche Nachricht-
Von: [EMAIL PROTECTED]
[mailto:[EMAIL
Hi Asha,
kmeans is a non-deterministic routine.
The help page says the following about the centers argument:
centers: Either the number of clusters or a set of initial cluster
centers. If the first, a random set of rows in 'x' are chosen
as the initial centers.
Hence,
Asha Jayanthi wrote:
I am trying to generate kmean of 10 clusters for a 165 x 165 matrix.
i do not see any errors known to me. But I get this error on running the
script
Error: empty cluster: try a better set of initial centers
the commands are
M -matrix(scan(R_mutual,n = 165 *
On Thu, 31 Mar 2005 22:22:32 -0500, Mario Morales
[EMAIL PROTECTED] wrote :
Is there a R function for sort a data frame by a variable ?
I know sort a vector, but I don't know sort a data frame by a
column. Can you help me ?
the sort() function don't work with data frame.
This is a FAQ, but
On Fri, 2005-04-01 at 09:30 +0200, Martin Maechler wrote:
dream == dream home [EMAIL PROTECTED]
on Wed, 30 Mar 2005 12:27:08 -0800 writes:
dream Dear R experts, Did someone implemented French Curve
dream yet? Or can anyone point me some papers that I can
dream follow to
Le 01.04.2005 05:22, Mario Morales a écrit :
Is there a R function for sort a data frame by a variable ?
I know sort a vector, but I don't know sort a data frame by a
column. Can you help me ?
the sort() function don't work with data frame.
take a look at ?order as in :
A -
http://finzi.psych.upenn.edu/R/Rhelp02a/archive/39835.html
(First hit using RSiteSearch(sort.data.frame) in R-2.1.0 alpha.)
Andy
From: Mario Morales
Is there a R function for sort a data frame by a variable ?
I know sort a vector, but I don't know sort a data frame by a
column. Can you
I remember that my father had a French curve: it was a plastic template
used for drawing which had several smooth edges of varying curvature.
You could use it to draw a wide variety of curved shapes. No doubt the
French called it something else.
Nobody, up and down the corridor here, of age to
Hello,
When I plot any data with simple plot command in
R, for example :-
plot(time,co2,ylim=c(350,380),xlim=c(1993,2003),xlab=NA,ylab=NA,type=p,col=5)
Then the first value of x-axis(350) and
y-axis(1993) never starts from origin, always they
sifted from the origin. Is there any command that
What a great package. I imagined the answer before hand, so I guess it's
right...
R rParaNorm(1)
[1] 0+42i
R
This will really help me through a Bayesian analysis I have to do today.
Thanks!
__
R-help@stat.math.ethz.ch mailing list
Search CRAN!
-- Bert Gunter
-Original Message-
From: [EMAIL PROTECTED]
[mailto:[EMAIL PROTECTED] On Behalf Of Poizot Emmanuel
Sent: Thursday, March 31, 2005 11:59 PM
To: r-help@stat.math.ethz.ch
Subject: [R] Classification of an image
Dear all,
I need to do a automatic
Inline below.
-- Bert Gunter
Genentech Non-Clinical Statistics
South San Francisco, CA
The R FAQ section 2.8 discusses how to cite R in
publications, but does
not (AFAICS) tell
me how to describe R in a sentence.
To wit, in my latest paper (destined for Rnews) one sentence reads:
I am running R on an XP machine. Lately I have been unable to start R in any
mode without getting the 'Fatal Error: cannnot find unused tempdir name'
message.
After reading previous postings I went in and deleted all my Rtmp* directories
in /documents and settings/USER/local/tmp which didn't
I have used the R statistical computing environment.
No-one has ever asked me to change it, but maybe someone else has something
better.
Hope this helps,
Matt Wiener
-Original Message-
From: [EMAIL PROTECTED]
[mailto:[EMAIL PROTECTED] On Behalf Of Robin Hankin
Sent: Friday, April 01,
On Fri, 1 Apr 2005, Asha Jayanthi wrote:
I am trying to generate kmean of 10 clusters for a 165 x 165 matrix.
i do not see any errors known to me. But I get this error on running the
script
Error: empty cluster: try a better set of initial centers
the commands are
M -matrix(scan(R_mutual,n = 165
Robin Hankin wrote:
Hi
[thanks to everyone for advice on Recall() and sapply()]
The R FAQ section 2.8 discusses how to cite R in publications, but does
not (AFAICS) tell
me how to describe R in a sentence.
To wit, in my latest paper (destined for Rnews) one sentence reads:
The R programming
On Fri, 1 Apr 2005, Frank E Harrell Jr wrote:
I wish to perform brain surgery this afternoon at 4pm and don't know
where to start. My background is the history of great statistician
sports legends but I am willing to learn. I know there are courses and
numerous books on brain surgery but I
Asha Jayanthi wrote:
I am trying to generate kmean of 10 clusters for a 165 x 165 matrix.
i do not see any errors known to me. But I get this error on running the
script
Error: empty cluster: try a better set of initial centers
the commands are
M -matrix(scan(R_mutual,n = 165 *
Marshall Mdoka wrote:
1)I have figures in a 3 rows and 3 columns. I tried to plot with:
postscript(trend_jfm.eps, horizontal=FALSE, onefile=TRUE)
I am getting the output cut. I am in linux (slackware) version 9 I think.
I have tried to add in some of the extra conditions like for A4 as in the
Kervahu Anne wrote:
Hi,
I try to fit a non linear regression by minimising the sum of the sum of
squares.
The model is number[2]-(x/number[1])^number[3]
Number [2] and number [1] change as the data changes but for all the set of
data number[3] must be identical.
I have 3 set of data (x1,y1),
dat-data.frame(ID=seq(1,10),x=runif(10,2,50))
dat-dat[sort.list(dat$ID),]
Francisco
From: bogdan romocea [EMAIL PROTECTED]
To: [EMAIL PROTECTED]
CC: r-help@stat.math.ethz.ch
Subject: RE: [R] a R function for sort a data frame.
Date: Fri, 1 Apr 2005 06:07:05 -0800 (PST)
dfr -
On Fri, 2005-04-01 at 17:00 +0200, Martyn Plummer wrote:
On Fri, 2005-04-01 at 09:30 +0200, Martin Maechler wrote:
dream == dream home [EMAIL PROTECTED]
on Wed, 30 Mar 2005 12:27:08 -0800 writes:
dream Dear R experts, Did someone implemented French Curve
dream yet? Or
The boot function documentation says, The data as a vector, matrix or
data frame. If it is a matrix or data frame then each row is
considered as one multivariate observation. From trying several
things, I've concluded that this means it resamples the rows but
calculates the statistic on the
My apologies if this is obvious:
Is there a simple way (other than simulation or bootstrapping) to obtain a
(approximate)confidence interval for the ratio of 2 variance components in a
fitted lme model? -- In particular, if there are only 2 components (1
grouping factor). I'm using nlme but lme4
In a paper for which I recently received reviews, I have the sentence
Statistical analyses were carried out with the R statistical system (R
Development Core Team, 2004). Reviewers did not complain (about that).
The particular journal falls in the domain of applied psychology.
-Dave Braze
On
Having searched and searched I still haven't found what's the problem with my
data (I've attached the relevant file).
Every time I tried to use the CANCOR-Function I got error messages.
So I turned to check my two sets of variables separately by using the
colMeans-Function. With one set no
?par look at xaxs.
Or just read `An Introduction to R' more carefully!
On Fri, 1 Apr 2005, Yogesh K. Tiwari wrote:
Hello,
When I plot any data with simple plot command in R, for example :-
plot(time,co2,ylim=c(350,380),xlim=c(1993,2003),xlab=NA,ylab=NA,type=p,col=5)
Then the first value of
Dear R community,
I am using xYplot() from the Hmisc package. The package works great to
plot means + CI. But I am having issues handling the scales.
I am plotting Soil Clay content vs Soil depth by land use.
Usually in this type of graphs it is better to place the variable soil
depth in the
From: Ken Knoblauch
I remember that my father had a French curve: it was a
plastic template
used for drawing which had several smooth edges of varying curvature.
You could use it to draw a wide variety of curved shapes.
No doubt the
French called it something else.
Nobody, up and
From: Yogesh K. Tiwari
Hello,
When I plot any data with simple plot command in
R, for example :-
plot(time,co2,ylim=c(350,380),xlim=c(1993,2003),xlab=NA,ylab=N
A,type=p,col=5) ^
R can only do what you _ask_ it to do, not what you want it to do. You have
Dear Tim,
Thank you so much for addressing all my questions. This really makes
sense.
I talked with my advisor yesterday about how to do bootstrapping for my
scenario: random clinic + random subject within clinic. She suggested that
only clinic are independent units, so I can only resample
Could anyone tell me what am I doing wrong?
pro-function(indep,dep){
+ d-data.frame(indep)
+ form-formula(lm(dep~.,data=d))
+
forward-step(lm(dep~X1,data=d),scope=form,trace=0,direction='f')
+ return(forward)
+ }
pro(m,q)
Error in inherits(x, data.frame) : Object d not
found
Where q is a
On Fri, 2005-04-01 at 18:13 +0200, Yogesh K. Tiwari wrote:
Hello,
When I plot any data with simple plot command in
R, for example :-
plot(time,co2,ylim=c(350,380),xlim=c(1993,2003),xlab=NA,ylab=NA,type=p,col=5)
Then the first value of x-axis(350) and
y-axis(1993) never starts from
Thank you to Paul Murrell and Martin Maechler for their help.
pushHexport() and the rest of the codes have done the trick.
I spent the afternoon trying to code up something that might be used as
grid.abline() and grid.grid() before I read Martin's suggestion. Sigh.
But here it is anyway in case
Ken Knoblauch knoblauch at lyon.inserm.fr writes:
I remember that my father had a French curve: it was a plastic template
used for drawing which had several smooth edges of varying curvature.
Yes. These were used by graphic artists, among others.
Some pictures of these are posted at
On 01-Apr-05 Martyn Plummer wrote:
On Fri, 2005-04-01 at 09:30 +0200, Martin Maechler wrote:
dream == dream home [EMAIL PROTECTED]
on Wed, 30 Mar 2005 12:27:08 -0800 writes:
dream Dear R experts, Did someone implemented French Curve
dream yet? Or can anyone point me some
This may sound like an April Fool's joke but it isn't really.
I just uploaded version 0.95-1 of the lme4 package for R. This is the
package with the new versions of the lme (linear mixed-effects) function
for R and the GLMM (generalized linear mixed models) function.
One distinguishing feature
Here is what my colleague dug up and his reaction to it, afterwards,
and then one of mine:
Pistolet, nom masculin
DESSIN. Instrument de tracé permettant de dessiner les lignes courbes dans les
tracés géométriques. Synon. curvigraphe, virgule. Les outils de l'écrivain
plumiste sont: la plume, le
On Fri, 2005-04-01 at 20:27 +0200, Hartmut Weinrebe wrote:
Having searched and searched I still haven't found what's the problem with my
data (I've attached the relevant file).
Every time I tried to use the CANCOR-Function I got error messages.
So I turned to check my two sets of variables
Hi Folks,
I don't think I'm up to implementing a function for
drawing French Curves, as requested by dream.
However, the discussion about it took me back so vividly
to the old days that, paranormally, I felt once again
the urge to ascertain magnitudes as it used to be, and
should be, done.
I
On Friday 01 April 2005 12:41, Jose A. Hernandez wrote:
Dear R community,
I am using xYplot() from the Hmisc package. The package works great to
plot means + CI. But I am having issues handling the scales.
I am plotting Soil Clay content vs Soil depth by land use.
Usually in this type of
On Fri, 2005-04-01 at 20:07 +0100, [EMAIL PROTECTED] wrote:
snip
I still have some, from the 1950s ... The curves in the edges
are supposed to be segments of logarithmic spirals (which
ensures a kind of self-similarity on different scales).
A nice picture is at
Ben wrote:
I wish to perform brain surgery this afternoon at 4pm and don't know
where to start. My background is the history of great statistician
sports legends but I am willing to learn. I know there are courses and
numerous books on brain surgery but I don't have the time for those.
...
It
On Fri, 2005-04-01 at 21:31 +0100, [EMAIL PROTECTED] wrote:
Its definition is below. Test it by entering
vernier(pi+sqrt(.182))
By following the instructions you should find that
the result is
x = 3 Units + 5 Tenths + 7 Hundredths
which is good enough for anyone. It generalises
On 01-Apr-05 Marc Schwartz wrote:
On Fri, 2005-04-01 at 20:07 +0100, [EMAIL PROTECTED] wrote:
snip
[...]
Splines, in the drawing-office sense, were long narrow
(about 1/4 inch wide) strips of thin springy metal with,
along their length, little flanges at right-angles to the
plane of the
On Fri, 2005-04-01 at 22:56 +0100, [EMAIL PROTECTED] wrote:
On 01-Apr-05 Marc Schwartz wrote:
On Fri, 2005-04-01 at 20:07 +0100, [EMAIL PROTECTED] wrote:
snip
[...]
Splines, in the drawing-office sense, were long narrow
(about 1/4 inch wide) strips of thin springy metal with,
Hi, people! This is my first babble on this list, please be kind! :-)
Last Tuesday, I wrote to the (likely) Webmaster of the R site to report
a little problem, but also to ask for advice about how to get a bulk
copy of the mailing list archives, from 2002 to now.
While I quite understand that
Qian wrote:
I talked with my advisor yesterday about how to do bootstrapping for my
scenario: random clinic + random subject within clinic. She suggested that
only clinic are independent units, so I can only resample clinic. But I
think that since subjects are also independent within clinic, shall
On 04/01/05 18:15, Franois Pinard wrote:
I would like to get hold on a copy of R mailing lists archives, for
local, off-line, progressive perusal (I find Web-based browsing of
email extremely inefficient). So, I recursively got archives from
`ftp://ftp.stat.math.ethz.ch/Mail-archives/'. The
Hello,
I'm attempting to create a surface plot similar to that produced with the
volcano data. Athough I understand persp() and can plot the volcano data just
fine, I'm struggling with how best to format my own data file for subsequent
importing. I've read through the available materials, but
Hi,
First, let me thank Jaroslaw for making this survey. I find it quite
illuminating.
Now the questions:
* the #1 solution below (based on cumsum) is numerically unstable.
Specifically if you do the runmean on a positive vector you can easily
get negative numbers due to rounding errors.
Jaroslaw's article was great. In fact, it was used as the basis for
rapply and some optimized special cases that will be included in
the R 2.1.0 version of zoo (which have been coded but not yet
released).
Regarding numerically stable summation, check out the idea
behind the following which I
[Franois Pinard]
I would like to get hold on a copy of R mailing lists archives [...]
[Jonathan Baron]
the archives themselves are at [...] (and probably listed in other
places).
Thanks a lot for bringing me to this URL. I've been there before, but
did not realise on first visit that the
as agresti(2002) points out that we had better to screen the data to see if the
the logit(pi) and the predictor has linear realtionship in logistic
regressin.and i find some materials in MASS and the refernce of s-plus.but it
is a bit simple and i can not exactly master the means to assess
I am a little confused about what you asked.
If you want to assess the linearity in logistic regression, why do you
want to use GAM instead of GLM?
As far as I understand, GAM is used to capture nonlinearity rather linearity.
Am I right here?
On Apr 1, 2005 10:19 PM, ronggui [EMAIL
maybe the idea is simle,but the details is beyond me.you are right,gam can
capture the non-linearity.but if the results from gam shows little evidence on
on-linearity,then we can assume linearity exists. am i right?
from agresti(2002):
...
Before fitting the model and making such
On Fri, 1 Apr 2005, Hartmut Weinrebe wrote:
Having searched and searched I still haven't found what's the problem with my
data (I've attached the relevant file).
Every time I tried to use the CANCOR-Function I got error messages.
So I turned to check my two sets of variables separately by using
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