Displaying 12 results from an estimated 12 matches similar to: "Forced inclusion of varaibles in validate command as well as step"
2007 Feb 26
2
survival analysis using rpart
Hello,
I use rpart to predict survival time and have a problem in interpreting the
output of ?estimated rate?. Here is an example of what I do:
> stagec <-
> read.table("http://www.stanford.edu/class/stats202/DATA/stagec.data",
> col.names=c("pgtime", "pgstat", "age","eet", "g2", "grade", "gleason",
>
2010 Apr 12
3
glmer with non integer weights
hello,
i'd appreciate help with my glmer.
i have a dependent which is an index (MH.index) ranging from 0-1. this index
can also be considered as a propability. as i have a fixed factor (stage)
and a nested random factor (site) i tried to model with glmer. i read that
it's possible to use a quasibinomial distribution, for this kind of data,
which i than actually did - but firstly
(1)
2011 Feb 25
1
Forced inclusion of varaibles in validate command as well as step
Hello all
I am a very new R user
I am used to using STATA
My problem:
I want to build a Cox model and validate this.
I have a large number of clinical relevant factors and feel the need to
reduce these. Meanwhile I have some clinical variables I deem sufficiently
important to force into the model regardless of AIC or p value.
This is my present log over commands
2006 Mar 29
0
R for Windows crash on new laptop
I'm trying to use a contributed package (rmetasim) to generate simulated
genetic datasets. My scripts work fine when I run them on a Sun
workstation running Solaris 7 and when I run them on a ~4 year old
laptop PC that I have. However, when I run them on my new laptop (Dell
Latitude D410 purchased in August 2005), the simulation will run for a
short (variable) period of time, then R
2006 Mar 29
0
R for Windows crash on new laptop - corrected script
I realized that the script I included in my original post (see below)
was written for an older version of rmetasim and will not work with the
current version. The only change that need be made to get my script to
run with the latest release of rmetasim is to change the command
'simulate.landscape()' to 'sim.landscape()'. My apologies to anyone who
tried to use my script and
2007 Jan 26
2
Use a text variable's value to specify another varaible?
Greetings guRus --
If a variable, e.g., 'varname', is a character string, e.g. varname <-
"datavector", and I want to apply a function, such as table(), to
datavector, what syntax or method will do so using only the variable
varname? This seems similar to indirect addressing, but I have not seen
a method for it in the R manuals. Is there a general name for such
indirect
2012 Nov 21
5
Creating a frequency table for binomial varaible
Hello,
I have simulated 30 observations from a binomial(5,0.1) distribution.
Now I need to make frequency table( that means I need to tally how many 0's
, 1's 2's....... 5's)
I know that the simple R function table() will do this, but I am afraid
that some times I may get zero frequency for some particular values (for
example in the above there are 5-0's 10-1's ,
2011 Jan 25
2
barplot with varaible-width bars
I would like to produce a bar plot with varying-width bars. Here is an example to illustrate:
ww <- c(417,153,0.0216,0.0065,556,256,0.0162,0.0117,
+ 726,379,0.0358,0.0501,786,502,0.0496,0.0837,
+ 892,591,0.0785,0.0795)
yy<-t(t(array(ww,c(2,10))))
barplot(yy[,2*1:5],las=1,space=c(.1,.5),beside=T)
produces a barplot of 5 pairs of bars that are of equal width
2010 May 20
1
Geneland error on unix: Error in MCMC(........ :, unused argument(s) (ploidy = 2, genotypes = geno)
I am receiving the above error ( full r session output below) the
script runs OK in windows. and "genotypes" and "ploidy" are both
correct arguments
any suggestions would be most welcome
Nevil Amos
MERG/ACB
Monash University School of Biological Sciences
> library(Geneland)
Loading required package: RandomFields
Loading required package: fields
Loading required
2011 Apr 06
1
Error in match.names(clabs, names(xi))
Hi Guys,
I have this part of a program:
library(survival)
Gastric <- cbind.data.frame(Gp=c(rep(1,45),rep(0,45)), ### 2nd gp 0
time=c(1,63,105,129,182,216,250,262,301,301,342,354,356,358,
380,383, 383,388,394,408,460,489,499,523,524,535,562,569,675,676,
748,778,786,797,955,968,1000,1245,1271,1420,1551,1694,2363,2754,2950,
2018 Mar 15
3
stats 'dist' euclidean distance calculation
Hello,
I am working with a matrix of multilocus genotypes for ~180 individual snail samples, with substantial missing data. I am trying to calculate the pairwise genetic distance between individuals using the stats package 'dist' function, using euclidean distance. I took a subset of this dataset (3 samples x 3 loci) to test how euclidean distance is calculated:
3x3 subset used
2010 Jul 18
6
CRAN (and crantastic) updates this week
CRAN (and crantastic) updates this week
New packages
------------
* allan (1.0)
Alan Lee
http://crantastic.org/packages/allan
Automates Large Linear Analysis Model Fitting
* andrews (1.0)
Jaroslav Myslivec
http://crantastic.org/packages/andrews
Andrews curves for visualization of multidimensional data
* anesrake (0.3)
Josh Pasek
http://crantastic.org/packages/anesrake
This