Displaying 20 results from an estimated 2000 matches similar to: "Wilks lamda and single discriminant function"
2008 Jan 23
1
adjusting y axis labels in lattice plots?
Are there parameters that would allow adjusting y axis labels in lattice
plots? E.g in the following simple example
require(lattice)
xyplot(rnorm(10) ~ 1:10, scales=list(alternating=2))
it would be nice to have the y axis labels adjusted to the right or at the
decimal point instead of left adjustment.
Thomas Zumbrunn
--
Thomas Zumbrunn
Institute of Zoology, University of Basel
Vesalgasse
2007 Dec 07
1
x11() and Xinerama settings
Hello
Since I changed my X11 settings to a Xinerama setup, calls to x11() result in
windows with a width half the size of the one specified by the corresponding
parameter. Furthermore, x axis labels are overlapping. Other devices (e.g.
pdf()), are not affected by these distortions.
Did anybody have the same problem, and if so, how did you solve it? ( I'm
using openSUSE 10.3 on a x86
2012 Jun 19
1
Stepwise Discriminant Analysis - greedy.wilks
I don't understand which is the problem
Could you help me please?
Thanks in advance
Marta
> str(data_indiciN2)
'data.frame': 200 obs. of 36 variables:
$ gruppo: Factor w/ 2 levels "0","1": 2 2 2 2 2 2 2 2 2 2 ...
$ I001N2: num 19.32 8.22 28.35 7.24 14.7 ...
$ I002N2: num 2.92 2.54 0.11 1.6 7.12 ...
$ I003N2: num -22.362 -0.222 -19.291
2010 Feb 24
1
Remove missing observations
Hi everyone
I have the following problem: My dataframe has 3 variables: ID, Year and
and an outcome variable. The dataframe contains repeated measurements
because the subjects filled out a questionnaire every year. The time span
covers 2 years.
Now I want to check if there is a significant change in the outcome over
the 2 years with a paired wilcox.test. The problem: Not every subject
2006 Feb 14
2
How to handle large dataframes?
Dear all
I imported a Stata .dta file with the read.dta-function from the
foreign-package. The dataframe's dimensions are
> dim(d.apc)
[1] 15806 1300
Importing needs up to 15 min and calculations with these data are rather
slow (although I subset the data before starting analyses).
My questions are:
1. Has someone experiences importing Stata files (alternatives to
read.dta) ?
2.
2012 Apr 29
1
Specifying special poisson maximum likelihood
Hi everyone
I am stuck on specifying my own maximum likelihood function for a
special poisson model.
My poisson model is as follow: O ~ Pois(b*N + b*RR*E)
With
O = observed cases
b = constant (known)
N = number of unexposed persons (known)
E = number exposed persons (known)
RR = relative risk (value is assumed under a scenario, e.g. RR=2.0)
I used rpois to simulate the values of O for several
2012 Jun 19
0
greedy.wilks
I have used the greedy.wilks to stepwise discriminant analysis, but it
doesn't work with my dataset.
I don't understand which is the problem
Could you help me please?
Thanks in advance
Marta
> str(data_indiciN2)
'data.frame': 200 obs. of 36 variables:
$ gruppo: Factor w/ 2 levels "0","1": 2 2 2 2 2 2 2 2 2 2 ...
$ I001N2: num 19.32 8.22 28.35 7.24
2006 Jan 20
2
assign object to list
Dear all
I want to generate a list like this:
a <- data.frame(1:10)
attr(a,'myattribute') <- 'something'
b <- data.frame(11:20)
attr(b,'myattribute') <- 'anything'
mylist <- list(a,b)
Is there a way to place the dataframes into the list giving them the
attribute at the same time?
I don't want to create all the dataframes in my workspace first.
2011 Mar 12
1
Stepwise Discriminant... in R
Hello R list,
I'm looking to do some stepwise discriminant function analysis (DFA) based
on the minimization of Wilks' lambda in R to end up with a composite
signature (of metals "Al","Sb","Bi","Cr","Ba") capable of discriminating
100% of the source factors (LANDUSE: "A","B","C").
The Wilks' lambda
2005 Nov 29
1
Indexing variables within lapply?
Hello
I am using R 2.2.0 with Windows XP.
I've got a five element list object, each element containing two
dataframes of equivalent size.
> str(mylist)
List of 1
$ data1:List of 2
..$ data1a :`data.frame': 77 obs. of 63 variables:
.. ..$ var1 : num [1:77] 0.41375 0.00056 1.43040 1.43528 0.61730 ...
.. ..$ var2 : num [1:77] 1.154 1.686 0.673 0.800 0.760 ...
..
2009 Aug 20
0
Canonical Discriminant Function Analysis
Dear R users:
Could you please help me out how to use R to get and interpret
Standardized discriminant functions and structure coefficients for sex,
Degree_Program, and Enrol_USM
Please find the data file at:
http://www.usm.maine.edu/~aaboueissa/Rhelps/Rhelps.html
data files are (xls file: dataforRxls or txt file: dataforRtxt)
Output looks like this table.
Standardized
2009 Aug 26
2
Statistical question about logistic regression simulation
Hi R help list
I'm simulating logistic regression data with a specified odds ratio
(beta) and have a problem/unexpected behaviour that occurs.
The datasets includes a lognormal exposure and diseased and healthy
subjects.
Here is my loop:
ors <- vector()
for(i in 1:200){
# First, I create a vector with a lognormally distributed exposure:
n <- 10000 # number of study subjects
2011 Apr 19
1
How to get the tuning parameter lamda in storey's qvalue package
Dear All,
In Storey's estimator of the proportion of true nulls, the estimator depends on the tuning parameter lamda.
Suppose now that an estimator of this proportion has been obtained by the qvalue package, what is the lamda that
corresponds to the estimate? How to get this lamda?
Thanks,
-Chee
[[alternative HTML version deleted]]
2009 Jul 17
1
attachment_fu :partition => lamda {}
Hi -
I am trying to dynamically create my partition folders via
attachment_fu. I have read about a hack that allows you to do this on
the attachment model:
:partition => lambda {|a| a.article_id}
Which passes the model''s object into the lambda and uses the
''article_id'' attribute as its directory name. However, this isn''t
work for me. I think the lambda
2017 Jun 16
1
Generate correlated expontial distribution -- lamda please guide
Hi,
I need to generate correlated (positive as well as negative) bivariate exponential distribution with rate of 1/5 or any rate
I need some guidance here. Please help.
Regards,
Sunny
2016 Jan 08
2
DNS problems on windows AD
Hi,
I have a domain composed by 3 linux samba 4 AD servers. I wanted to add a
windows based domain controller on it and followed the documentation on the
samba wiki. Everything works fine except the DNS:
- when I try do add a dns record on the windows 2008r2 server, I got an
error popup with "Refused"
- in the DNS service logs at startup I got an error 4014: "The DNS server
was
2008 Jun 18
4
Editor for Mac OSX
Dear R-list
I am (forced) to change from Linux to Mac and am now looking for a new editor for R. I would like one that features a split window (console + editor) as well as syntax highlighting. Can anyone help? Especially the split-window feature does not seem to be easily available in the editors desribed on the R-help site, except Emacs, which I am reluctant to start using. I am on a MacBook Air
2010 Apr 12
1
Local R Training
Hello List,
I am new to R and statistics in general.
My two colleges and I would like to get some training in the proper
usage of R.
A quick internet search provided no results for the region of Basel in
Switzerland.
Does some one on this list knows of any trainers or schools in the
region in question or where to look next?
Regards,
Dominik Riva
Universitätsspital Basel
Med.
2016 Jan 08
3
DNS problems on windows AD
Hello Marc,
samba is 4.1.22.
I let the dcpromote choose the DC.
DNS is internal
Yes the windows DC has also global catalog
Regards
Olivier
On Fri, Jan 8, 2016 at 4:38 PM, Marc Muehlfeld <mmuehlfeld at samba.org> wrote:
> Hello Olivier,
>
> Am 08.01.2016 um 12:02 schrieb Olivier Weinstoerffer:
> > I have a domain composed by 3 linux samba 4 AD servers.
>
> - Which
2004 Oct 20
2
common axis label in multiple plot area
Hello
A very short question: Using multiple plots with par(mfrow=c(3,3)), how
can I get R to indicate one common y- and x-axis label? I tried to use
text() in par, but this is then overwritten when I plot the graphs.
--
Sebastian Leuzinger
Institute of Botany, University of Basel
Schönbeinstr. 6 CH-4056 Basel
Ph. 0041 (0) 61 267 3511
fax 0041 (0) 61 2673504
email: Sebastian.Leuzinger@unibas.ch