Displaying 20 results from an estimated 500 matches similar to: "select subsets in data frame"
2007 Jan 27
1
Conditional Selection of Columns for Tables
Dear Wizards -
Thank you so much for your help. That was exactly what I was looking
for. Now, I have been working on conditional selection of columns in a
data frame. My goal is to calculate the total revenue per sales
representative per status in a table. I have come to a complete stop:
Let's say, we have a data.frame called df with several columns and a
number of rows:
df <-
2005 Nov 02
2
Anything like associative arrays in R?
Let me preface my question by stressing that I am much less interested
in the answer than in learning a way I could have *found the answer
myself*. (As helpful as the participants in this list are, I have far
too many R-related questions to resolve by posting here, and as I've
written before, in my experience the R documentation has not been very
helpful, but I remain hopeful that I may have
1999 Mar 25
1
Y-limits of barplots
Hello everybody,
I frequently have to produce barplots from variables the natural variation
of which is far away from zero. A typical range would be, say from -16 to
-28.
So, the following example should give an "honest" presentation:
x<-c(-20,-22,-21,-28)
barplot(x,beside=T,ylim=c(-18,-30))
But using anything else but "0" for the first element of ylim
leads to strange
2004 Sep 14
3
Signs of loadings from princomp on Windows
I start a clean session of R 1.9.1 on Windows and I run the following code:
> library(MASS)
> data(painters)
> pca.painters <- princomp(painters[ ,1:4])
> loadings(pca.painters)
Loadings:
Comp.1 Comp.2 Comp.3 Comp.4
Composition 0.484 -0.376 0.784 -0.101
Drawing 0.424 0.187 -0.280 -0.841
Colour -0.381 -0.845 -0.211 -0.310
Expression 0.664 -0.330 -0.513
2005 Oct 31
2
nls() fit to Kahnemann/ Tversky function
Dear WizaRds,
I would like to fit a curve to ten points with nls() for one
unknown parameter gamma in the Kahnemann/ Tversky function, but somehow
it won't work and I am unable to locate my mistake.
p.kum <- seq(0.1,1, by=0.1)
felt.prob.kum <- c(0.16, 0.23, 0.36, 0.49, 0.61, 0.71, 0.85, 0.89, 0.95,
1) ## how to find a function that fits these points nicely?
plot(p.kum,
2007 Oct 16
1
Errata: dovecot + ldap + virtual mailbox: building mail location path
Hi all again,
I've just realized that I did a bad cut&paste in my previous mail, then
I rewrite my request. I apologize.
I am trying to set up my dovecot configuration using LDAP and virtual
mailboxes. I succeeded in authenticating the users correctly with LDAP,
but have problems with referencing the correct mail location directory.
I manage several domains. The mailboxes are stored
2006 Mar 25
2
pairwise combinatons of variables
Dear WizaRds,
although this might be a trivial question to the community, I was unable to
find anything solving my problem in the help files on CRAN. Please help.
Suppose I have 4 variables and want to use all possible combinations:
1,2
1,3
1,4
2,3
2,4
3,4
for a further kmeans partitioning.
I tried permutations() of package e1071, but this is not what I need. Thank you
for your help and
2005 Sep 09
1
regression with restrictions - optimization problem
Dear WizaRds!
I am sorry to ask for some help, but I have come to a complete stop in
my efforts. I hope, though, that some of you might find the problem
quite interesting to look at.
I have been trying to estimate parameters for lotteries, the so called
utility of chance, i.e. the "felt" probability compared to a rational
given probability. A real brief example: Given is a lottery
2004 Dec 12
1
firefox and R 201
please help.
why is it that i cannot open html help pages out of the R menu? here is what I do: using browser firefox1.0 (open
source!), java plugin jre 150 installed, supposedly working properly. opening R201patched, html help, link:search engine
and keywords: works properly, jre symbol appears. clicking on any link (keywords on that page): no reaction whatsoever.
what am i doing wrong?
2006 Jul 07
2
Multistage Sampling
Dear WizaRds, dear Thomas,
First of all, I want to tell you how grateful I am for all your
support. I wish I will be able to help others along one day the same way
you do. Thank you so much. I am struggling with a multistage sampling
design:
library(survey)
multi3 <- data.frame(cluster=c(1,1,1,1 ,2,2,2, 3,3), id=c(1,2,3,4,
1,2,3, 1,2),
nl=c(4,4,4,4, 3,3,3, 2,2), Nl=c(100,100,100,100,
1999 Mar 25
1
data sets
hi,
I am new to the list, and wonder where can I find the data sets used in
the exercises at the end of the "Notes on R" ...
thanks,
-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-
r-help mailing list -- Read http://www.ci.tuwien.ac.at/~hornik/R/R-FAQ.html
Send "info", "help", or "[un]subscribe"
(in the "body",
2005 Jul 20
0
freebsd-security Digest, Vol 120, Issue 1
On Wed, Jul 20, 2005 at 12:00:36PM +0000, freebsd-security-request@freebsd.org wrote:
> From: Joachim Str?mbergson <watchman@ludd.ltu.se>
> Subject: Adding OpenBSD sudo to the FreeBSD base system?
> To: freebsd-security@freebsd.org
> Message-ID: <42DCC503.5000408@ludd.ltu.se>
> Content-Type: text/plain; charset=ISO-8859-1; format=flowed
>
> Aloha!
>
>
2003 Nov 12
0
Wintab32 - Tablet support - VBtablet & wintab working for Dogwaffle?
I too would be very interested in knowing what's happening with wintab32
under wine - is it usable?
How about in conjunction with VBtablet from www.greenreaper.co.uk ? He has a
small test program there which reports pressure, angle etc.... you might
want to see if that works.
Does somebody on this list have a Wacom, AceCad, Pablo (Disney Magic Artist)
or Aiptek tablet to try Dogwaffle with
2005 Dec 12
1
Wine 0.9.3: Painter 7 and Classic Painter problems
Sorry if this post turns up a second time, I used a wrong e-mail account
for the previous one by mistake.
I have recently installed Wine 0.9.3 and subsequently tried to set up
Painter 7, an application I have used successfully with several versions
of Wine before. On this version it won't install anymore; after asking
for the serial number it freezes. It's an update version, if that
2009 Aug 25
3
[Bug 23505] New: KDE's Kubrick has problems with xf86-video-nouveau driver
http://bugs.freedesktop.org/show_bug.cgi?id=23505
Summary: KDE's Kubrick has problems with xf86-video-nouveau
driver
Product: Mesa
Version: git
Platform: Other
OS/Version: All
Status: NEW
Severity: normal
Priority: medium
Component: Drivers/DRI/nouveau
AssignedTo: nouveau at
2006 Jun 28
1
persp/ scatterplot3d
Dear WizaRds,
I would like to create a 3d-plot with persp(). I sampled 17 points
with xyz-coordinates (real-life example!), representing the peaks of the
whole plane with "zero coordinates" x=3,y=3,z=3. My intention is to show
which entries are above or below the "zero" level with persp() on a
nicely created grid. I also tried scatterplot3d(), but, alas, I am
unable
2007 Jul 14
1
return() in nested functions
Dear WizaRds,
After consulting different sources I am still unable to understand the
correct use of return() in nested functions. To illustrate the problem:
f <- function(x,y,type){
est1<-function(x,y){
z=x+y
out(x,y,z)}
est2<-function(x,y){
z=x*y
out(x,y,z)}
out<-function(x,y,z)
return(x,y,z)
if (type=="est1") est1(x,y)
if (type=="est2") est2(x,y)
}
2006 Jan 08
1
Clustering and Rand Index - VS-KM
Dear WizaRds,
I have been trying to compute the adjusted Rand index as by Hubert/
Arabie, and could not correctly approach how to define a partition
object as in my last request yesterday.
With package fpc I try to work around the problem, using my original data:
mat <- matrix( c(6,7,8,2,3,4,12,14,14, 14,15,13,3,1,2,3,4,2,
15,3,10,5,11,7,13,6,1, 15,4,10,6,12,8,12,7,1), ncol=9, byrow=T )
2007 Jan 16
3
dovecot imap logging capabilities
Hello,
I have searched but have not found any information on logging imap
actions. I want to log when someone uses imap to delete, move, copy, etc.
This would greatly help me when someone deletes an email and asks where it
went. I get this fairly often from a few users. Any help would be greatly
appreciated.
Thank you,
Michael A. Painter Jr.
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2007 Nov 24
1
Indexing and partially replacing 99, 999 in data frames
Dear WizaRds,
unfortunately, I have been unable to replace the '99' and '999' entries in
library(UsingR)
attach(babies)
as definitions for missing values NA, because sometimes the 99 entry is
indeed a correct value. Usually, or so I thought, NAs can
easily replace a, say, 999 entry via
mymat[mymat==999] <- "yodl"
in a matrix or data frame. Alas, the babies'