Displaying 20 results from an estimated 5000 matches similar to: "unknown compression"
2003 Apr 24
4
problems with max.col()
Hello, I think the following qualify as a bug
given:
x<-c(1,2,3,4,2,4,2,2,4,2,2,2,4,3,2,1)
z<-embed(x,4)
z
[,1] [,2] [,3] [,4]
[1,] 4 3 2 1
[2,] 2 4 3 2
[3,] 4 2 4 3
[4,] 2 4 2 4
[5,] 2 2 4 2
[6,] 4 2 2 4
[7,] 2 4 2 2
[8,] 2 2 4 2
[9,] 2 2 2 4
[10,] 4 2 2 2
2003 Apr 24
4
problems with max.col()
Hello, I think the following qualify as a bug
given:
x<-c(1,2,3,4,2,4,2,2,4,2,2,2,4,3,2,1)
z<-embed(x,4)
z
[,1] [,2] [,3] [,4]
[1,] 4 3 2 1
[2,] 2 4 3 2
[3,] 4 2 4 3
[4,] 2 4 2 4
[5,] 2 2 4 2
[6,] 4 2 2 4
[7,] 2 4 2 2
[8,] 2 2 4 2
[9,] 2 2 2 4
[10,] 4 2 2 2
2002 Feb 04
1
read zipped files
I received several answer to my querry re reading zipped files,
R.Gentleman, Liaw Andy, BD Ripley,J Holtman, A.Matt, and others,
sorry
if I missed your names.
a- use pipe to run external unzip to a file and read from there
b- use gzfile() to open directly a gzipped file
c- use zip.file.extract()
solution b works like a charm, unfortunately it open gzipped files
and
not zipped files, would it be
2001 Dec 12
1
again evaluations
Hello, I wrote the following function to compute multiple comparisons in
a one way anova and randomized blocks anova.
aov1 <- function(y,g,s=NULL,comp="mca",meth="Sidak") {
#
fun <- function(x)
c(mean(x,na.rm=T),sd(x,na.rm=T),length(x[!is.na(x)]))
#
li <- length(unique(g))
cat(" Analysis of Variance with Multiple comparisons\n\n")
cat("
2012 Jul 31
2
help with a regression
Hello, I have a data frame with the following variables:
ID, X1,X2,X3,X4,X5,Y1,Y2,Y3,Y4,Y5 and some other that do not matter, some of the X and Y can be missing (NA). I want to compute the slope of the linear regression Y ~ X for each subject, so using
apply(DF,1,FUN,ra.rm=TRUE) now How do I define FUN? The X are different for each subject.
Thanks for any help
R.Heberto Ghezzo Ph.D.
Montreal -
2003 Jan 29
3
na.rm in sd()
Hello, I think this qualify as a bug
> x<-c(1,2,3,4,NA,6,7)
> mean(x)
[1] NA
> mean(x,na.rm=T)
[1] 3.833333
> sd(x)
Error in var(as.vector(x)) : missing observations in cov/cor
> sd(x,na.rm=T)
Error in sd(x, na.rm = T) : unused argument(s) (na.rm ...)
> var(x)
Error in var(x) : missing observations in cov/cor
> var(x,na.rm=T)
[1] 5.366667
>
why sd() does not
2000 Sep 13
2
minimization
Hi, I got a code from S that uses 'nlminb' to minimize a function
with constraints. Is there a similar function in R?
Thanks.
R. Heberto Ghezzo Ph.D.
Meakins-Christie Labs
McGill University
Montreal - Canada
heberto at meakins.lan.mcgill.ca
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r-help mailing list -- Read
2012 Aug 01
3
help with a regression problem
Hello,
I have a big data frame where consecutive time dates and corresponding observed values for each subject (ID) are on a line. I want to compute the linear slope for each subject. I would like to use apply but I do
not know how to express the corresponding function. An example using a loop follows
#
# create dummy data set There are missing values
a <- c(1,2,3,4, 1,1,1,1, 2,2,3,3,
2011 Mar 01
2
problems with playwith
hello, i tried to run playwith but :
> library(playwith)
Loading required package: lattice
Loading required package: cairoDevice
Loading required package: gWidgetsRGtk2
Loading required package: gWidgets
Error in inDL(x, as.logical(local), as.logical(now), ...) :
unable to load shared object 'H:/R/cran/RGtk2/libs/i386/RGtk2.dll':
LoadLibrary failure: The specified procedure could
2004 Feb 09
10
PhD student reading list, suggestions wanted
I've got a PhD student starting this year.
She'll be working on data mining.
She has asked for a reading list while she's still in her home
country, which is a really good sign.
Her cosupervisor and I don't (think we) have any problem with
choosing things that are specifically about data mining, but
there are some statistical ideas (sampling, exploratory-vs-confirmatory,
2005 Jan 17
5
find source code
I am using R 2.0.2 on a WinXP
I am trying to get the code of the Kruskal-Wallis test but
> kruskal.test
function (x, ...)
UseMethod("kruskal.test")
<environment: namespace:stats>
> ls(3)
[1] "acf" "acf2AR" "add.scope"
..............
[181] "kruskal.test" "ks.test"
2009 May 27
3
R in Ubunto
Hello , I do not know anything abount Ubunto, but I found a Portable Ubunto for Windows and since so many people
prefer Linux to Windows I decided to give it a try.
It runs very nicely, so I tried to load R, following Instructions in CRAN I added the line
deb http://probability.ca/cran/bin/linux/ubuntu hardy/ to /etc/apt/sources.list and then from a console
I did
sudo apt-get update
sudo apt-get
2001 Mar 14
2
scan
Hello, I have a problem. I have to read a HUGE file which has to be
line processed, so I would like to use scan like
p <- scan(pfile,what=c(0,0,0,"",0,""),nlines=1)
but it continues to read the first line, so I have to add a skip and
increment the skip after each read.
It takes forever to read a test file of 1 Mb, the real one is in 60's Mb
Is there a way to read line
2003 Jan 29
2
problems with by()
Hello, another problem.
> x<-rep(1,10)
> y<-rep(c(1,2),c(5,5))
> z<-seq(1:10)
> ab<-data.frame(x,y,z)
#
now I want to do some work by the value of 'y'
> by(ab,y,mean)
y: 1
x y z
1 1 3
------------------------------------------------------------
y: 2
x y z
1 2 8
#
I do not want all the means, only the mean of 'z'
> by(ab,y,function(x)
2011 Apr 20
1
Sweave
Hello,
I never used Sweave before but now I try and got:
>
> rnwfile <- system.file("Sweave", "example-1.Rnw", package = "utils")
> Sweave(rnwfile)
Writing to file example-1.tex
Processing code chunks with options ...
1 : echo term verbatim
2 : term verbatim pdf
You can now run (pdf)latex on 'example-1.tex'
>
2000 Jul 26
4
differential equations
Hi, Does somebody knows of the existence of a library of functions
for solving differential equations, I need a solver for a system of non
linear first order differential equations. I think there was something
in IMSL but that was a long time ago and probably there are some
new algorithms in the new now.
Thanks for any pointers.
.
R. Heberto Ghezzo Ph.D.
Meakins-Christie Labs
McGill
2001 Apr 19
2
extraction
Hello everybody
I am trying to extract some observations from a data frame, ie the
subjects that belong to a given group, and although t-test etc work
if I try to obtain the number of subjects in the subgroup i get some
funny numbers. All the subjects with NA for group are included in
the subgroups 'group==1' etc.
Is this a bug?
for example in Windoze
R : Copyright 2001, The R
1999 Nov 09
2
Problems with read.table
Hi I am using R65.1 in Windows 95
I have a CSV file from Excell
>
a<-read.table("c:/heberto/mgc/tst.csv",header=T,sep=",")
> attach(a)
> a
manolo fvcpp fevpp fvvcpp tlcpp rvpp rvtlpp plmaxpp
1 1 99.28 97.67 98.38 91.14 102.9 111.25 117.64
2 1 86.97 68.56 78.89 94.60 112.34 118.53 159.20
3 1 81.12 71.76 88.37 89.16
2007 Nov 01
2
problem with log axis
Hello,
if I do:
x <- c(0.5,1,3,6,10,20,40)
y <- 10-log(x)+rnorm(7,0,0.05)
r1 <- lm(y ~ log(x))
plot(log(x),y)
abline(r1)
#
I get a nice plot with the regression line almost over the points.
but:
plot(x,y,log="x")
abline(r1)
gives me exactly the same plot for the points but the regression line
is completely off !
I would like the plot with the real values of X on
2010 Apr 15
1
Poblems wih EBImage
Hello, Working with Windows 7 in a HP laptop with R-2.10.1
I download and installed ImageMagick-6.3.7.7-Q16-Windows-dll.exe and GTK 2.12.9-win32-2, then downloaded and installed from local file EBImage_3.2.0.zip and I got:
> library(EBImage)
Loading required package: abind
Error in inDL(x, as.logical(local), as.logical(now), ...) :
unable to load shared library