Displaying 20 results from an estimated 800 matches similar to: "Performance note: Preallocating helps? and two questions"
2001 Aug 28
2
fitting a mixture of distributions with optim and max log likelihood ?
hi
Suppose I have a mixture of 2 distributions generated by
rtwonormals <- function(npnt,m1,s1,m2,s2,p2){
rv<-vector(npnt,mode="numeric")
for( i in seq(1:npnt)){
if(runif(1,0,1)<=p2){
rv[i]<-rnorm(1,m2,s2)
}
else{
rv[i]<-rnorm(1,m1,s1)
}
}
return(rv)
}
x <- rtwonormals(50000,0,100,500,500,0.05)
#and I try to fit these with (based on thread: [R]
2000 Jul 27
3
R under Win2000?
Dear all,
Will R run under Win2000 or is it safer to stay with NT4.0 for a while?
Regards
--
Dr. Jens Oehlschl?gel
Analyse
BBDO InterOne
Gr?nstr. 15
40212 D?sseldorf
Tel.: +49 (0)211 1379-187
Fax.: +49 (0)211 1379-461
http://www.bbdo-interone.de
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2001 Sep 07
2
dxf() like bmp() or postscript()?
hi-
I have been using postscript()and contour() to do quick plots of geological
sufaces and it would be handy to be able to dump a plot as an autocad dxf
file for vector import into autocad. A search of rhelp of 99 thru 01 gave no matches for dxf. Any suggestions for a dxf or dump of a plot as vectors?
Thanx
Thanx
Robert (Bob) L Sandefur
Principal Geostatistician
Pincock Allen & Holt
2005 Apr 05
1
Dendrogram for a type unbalanced ANOVA
Hi-
I have about 20 groups for which I know the mean, variance, and number of
points per group. Is here an R function where I can plot (3 group example)
something like
| |----- 2
| |-----------|
| | |----- 1
| |
|------|
| |----------------- 3
|
|
0 25 50 75 100
ie 1 and 2 are different at 75% level of confidence
1 2 combined are
2001 Mar 12
4
1.2.2 under M$ windows 2000 lots of plots out of memory?
hi-
If I source the following
for(k in seq(1:20)){
x<-runif(20000,min=-500,max=2000)
y<-runif(20000,min=-500,max=2500)
z<-runif(20000,min=-10,max=10)
cat(k,"file",memory.size())
cc<-rainbow(11)
plot(x,y,asp=1i,xlim=c(-500,2000),ylim=c(-500,2500),main=k,cex=1.0)
for(i in seq(-10,10,2)){
points(x[z > i],y[z > i],col=cc[(12+i)/2],cex=1.0)
}
rm(x,y,z)
2000 Oct 12
2
getting a windows environment variable in r
hi-
I would like to get a value set with the dos set command (e.g. set dog=cow) in a rterm session on rterm 1011 under windows 2000. if I try in a dos window:
set dog=cow
echo %dog%
i get cow (what I want)
then i start rterm
system("echo %dog%",intern=T)
gives "%dog%"
I can of course do something like
set dog=cow
echo %dog% >jnk.rin
and then start rterm and
2000 Mar 18
1
abline(coef=c(1,1)) different behavoir to screen and postscript 1.00 under windows
hi listees-
Running windows 2000 and r 0.99 or 1.00; I get different lines on screen and print out:
> j<-read.table("jnk.rin",head=T,sep="\t")
> attach(j)
> #gives lines I want
> qqnorm(Dog,pch="o",main="Cumulative Frequency Log Dog Size",log="y",sub="Figure 2",x
=c(-3,3),ylim=c(2000,1000000))
>
2000 Feb 28
1
sub in boxplot doesn't do subtiles
R list-
Under Windows 2000 and r 99:
I wanted a subtitle in boxplot and tried:
> boxplot((AU[ROCK==2 & AU>-1]+0.1~iz),log="y",main="Boxplot of AU by 25 M elevations",sub="aa")
And I got:
Error in sort(x) : only vectors can be sorted
In addition: Warning messages:
1: is.na() applied to non-(list or vector) in: is.na(x)
2: is.na() applied to non-(list
1999 Nov 24
1
Re: R 0.90.0 for Windows rwinst fails (for me) and workaround
hi-
I downloaded r 0.90.0 for windows and ran rwinst.exe and the base package would not install for me. I had to unzip
rw0900b1.zip and r20900b2.zip manually and then do the rest of install with rwinst. Is this due to b being replaced
by b1 and b2?
Robert (Bob) L Sandefur
Principal Geostatistician
PAH
rls at pincock.com (primary)
rlsandefur at aol.com (secondary)
303 914 4467 v
393 987-8907 f
2001 Mar 21
5
generate random number
Hi,
I want to pick 3 "integer" random numbers from 1 to
10. How to do this?
Thanks,
Yu-Ling Wu
__________________________________________________
Do You Yahoo!?
Get email at your own domain with Yahoo! Mail.
http://personal.mail.yahoo.com/
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2001 Sep 27
1
list of all objects - just being curious
Hello all,
to obtain a list of all objects in all search paths, I've found the
following to work:
> biglist <- sapply(1:length(search()), objects)
This more obvious one, however, does not work:
> biglist <- sapply(search(), objects)
Error in pos.to.env(pos) : invalid argument
Still, search() gives
[1] ".GlobalEnv" "package:ctest" "Autoloads"
2002 Apr 04
1
html documentation bug in: help(par), 'las'
Currently (R-1.4.1 as well as R-devel, according to
http://stat.ethz.ch/R-alpha/R-devel/library/base/html/par.html), the html
version of help(par) shows
[...]
lab
A numerical vector of the form c(x, y, len) which modifies the way that
axes are annotated. The values of x and y give the (approximate) number
of tickmarks on the x and y axes and len specifies the label size. The
default
2000 Mar 22
4
density ellipses?
Hello,
has anybody written a function to plot density ellipses (95%, 99% or
anything) in a scatterplot? I found nothing in any package, nor in the list
archives.
There does seem to be a contributed package "ellipse" for S-Plus (on
S-Archive), but it does a lot more than what I would need. Still, if anybody
ported it to R, I'd be grateful for a link. I'm a bit afraid to try the
2000 May 09
1
Type III Sums of Squares?
Hello,
I'd like to propose an extension to the function summary.aov.
In Splus (2000, I don't know about other versions), summary.aov allows a
parameter ssType to be set to 1 or 3 (defaults to 1) to choose the type of
Sums of Squares.
I know I can get Type III SS in R with drop1(model), but including the
functionality into summary.aov would, in my opinion,
- yield a more usable table
2000 Jun 22
1
R 1.1 congrat; undocumented behaviour of recordPlot
Hello,
first, I'd like to congratulate the core team to the new R version 1.1. I
think it's a great update, with glimpses into an even greater future
(tcltk!).
While playing around with the new functions (on Win 95), I found the
following:
As the documentation states, when I generate a plot and save it with
recordPlot, I can regenerate it by printing the variable:
> plot(1:10)
>
2012 Mar 06
1
sourcearg function is there a better way already built into R
Hi list:
I work with a lot of laboratory analytical data and I often have
inconsistent names of files and variables within those files so I wrote
this sourcearg function to facilitate handling file and variable names
as both character and R names. The source of the function is given below
sourcearg=function(arg){
su=sprintf("%s\n",arg)
sink("TMPTMPRarg")
2001 Dec 19
2
How to create a data.frame "like" another, but longer?
Hello,
does anyone know of a quick way to create a data frame "like" another, but
with more rows?
What I'd like to do is this:
if mydata is a data.frame like
a b c
1 TRUE yes
2 FALSE no
3 TRUE yes
I'd like to get mydata2 with the same column names and column types, but
without the values and with more rows.
All I could think of was to manually do
2001 Mar 22
2
newbie questions: accessing functions globally
How can I access a function created in one data directory in another? I
have been sourcing the text file that contains the function each time I go
to another data dir. This is cumbersome, and I suspect there is a way to
make functions global.
Thanks in advance,
S. David White
Dept of Speech and Hearing Science
Ohio State University
Columbus, Ohio
2000 Jun 23
1
Re: undocumented behaviour of recordPlot (PR#578)
On Thu, Jun 22, 2000 at 05:01:32PM +0200, p.dalgaard@biostat.ku.dk wrote:
> I think this is pretty certainly a bug, so I'm cc'ing this to r-bugs.
>
> -p
>
> Kaspar Pflugshaupt <pflugshaupt@geobot.umnw.ethz.ch> writes:
> > As the documentation states, when I generate a plot and save it with
> > recordPlot, I can regenerate it by printing the variable:
2000 Jun 23
1
Re: undocumented behaviour of recordPlot (PR#578)
On Thu, Jun 22, 2000 at 05:01:32PM +0200, p.dalgaard@biostat.ku.dk wrote:
> I think this is pretty certainly a bug, so I'm cc'ing this to r-bugs.
>
> -p
>
> Kaspar Pflugshaupt <pflugshaupt@geobot.umnw.ethz.ch> writes:
> > As the documentation states, when I generate a plot and save it with
> > recordPlot, I can regenerate it by printing the variable: