search for: dssm

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2008 Jun 30
2
difference between MASS::polr() and Design::lrm()
...t seems to me that results from lrm() are right.. Am I wrong? Thanks, vito -- ==================================== Vito M.R. Muggeo Dip.to Sc Statist e Matem `Vianelli' Universit? di Palermo viale delle Scienze, edificio 13 90128 Palermo - ITALY tel: 091 6626240 fax: 091 485726/485612 http://dssm.unipa.it/vmuggeo
2009 Nov 02
3
partial matching with grep()
...to get this result with grep()? many thanks for your attention, best, vito -- ==================================== Vito M.R. Muggeo Dip.to Sc Statist e Matem `Vianelli' Universit? di Palermo viale delle Scienze, edificio 13 90128 Palermo - ITALY tel: 091 6626240 fax: 091 485726/485612 http://dssm.unipa.it/vmuggeo
2004 May 11
2
bilinear and non linear
...ive answer ... thanks in advance, Daria **************************** Daria Mendola Dipartimento di Scienze Statistiche e Matematiche "Silvio Vianelli" Universit?? di Palermo Viale delle Scienze - Edificio 13 90128 Palermo, Italia tel. +39 091 6626210 fax +39 091 485726 email: mendola at dssm.unipa.it
2004 Dec 14
1
correlation in lme4
...| g). Can anybody help me? Antonella ************************************************** Prof. Antonella Plaia Dipartimento di Scienze Statistiche e Matematiche "S. Vianelli" Universit?? di Palermo Viale delle Scienze 90128 Palermo ITALIA Tel. +39 091 6626244 Fax +39 091 485726 http://dssm.unipa.it/plaia e-mail:plaia at unipa.it
2008 May 02
1
error in using by + median
...in median.default(data[x, , drop = FALSE], ...) : need numeric data > -- ==================================== Vito M.R. Muggeo Dip.to Sc Statist e Matem `Vianelli' Universit? di Palermo viale delle Scienze, edificio 13 90128 Palermo - ITALY tel: 091 6626240 fax: 091 485726/485612 http://dssm.unipa.it/vmuggeo
2010 Mar 04
1
only actual variable names in all.names()
..." "x" "z" Where is the trick? many thanks vito -- ==================================== Vito M.R. Muggeo Dip.to Sc Statist e Matem `Vianelli' Universit? di Palermo viale delle Scienze, edificio 13 90128 Palermo - ITALY tel: 091 23895240 fax: 091 485726/485612 http://dssm.unipa.it/vmuggeo
2013 Mar 12
1
Constrain slope in segmented package
Hello, I'm currently using the segmented package of M.R. Muggeo to fit a two-slope segmented regression. I would like to constrain a null-left-slope, but I cannot make it. I followed the explanations of the package (http://dssm.unipa.it/vmuggeo/segmentedRnews.pdf) to write the following code : fit.glm <- glm(y~x) fit.seg <- segmented(fit.glm, seg.Z=~x,psi=0.3) fit.glm <-update(fit.glm,.~.-x) fit.seg1 <-update(fit.seg) If I got well, the two last lines are supposed to constrain the slope, but it...
2010 Oct 25
1
building lme call via call()
...ll (similar to the one from fm1$call) by means of call()? thanks, vito -- ==================================== Vito M.R. Muggeo Dip.to Sc Statist e Matem `Vianelli' Universit? di Palermo viale delle Scienze, edificio 13 90128 Palermo - ITALY tel: 091 23895240 fax: 091 485726/485612 http://dssm.unipa.it/vmuggeo
2005 May 05
2
names(dist(mat)) gives NULL in R 2.1.0
...is a bug or not? Thanks in advance, Elio -- ---------------------------------------------------------------------------------- Angelo M. Mineo Dipartimento di Scienze Statistiche e Matematiche "S. Vianelli" Universit?? degli Studi di Palermo Viale delle Scienze 90128 Palermo url: http://dssm.unipa.it/elio
2003 Oct 24
1
gee and geepack: different results?
...: 6 Maximum cluster size: 8 Thanks, Daria **************************** Daria Mendola Department of Statistics and Matematics "Silvio Vianelli" University di Palermo Viale delle Scienze - Edificio 13 90128 Palermo, Italy phone +39 091 6626210 fax +39 091 485726 email: mendola at dssm.unipa.it
2006 Mar 01
0
[Fwd: Re: [R] a strange problem with integrate()]
...quot;A Guide for the Unwilling S User") -------- Original Message -------- Subject: Re: [R] a strange problem with integrate() Date: Wed, 01 Mar 2006 11:44:33 -0600 From: Sundar Dorai-Raj <sundar.dorai-raj at pdf.com> Organization: PDF Solutions, Inc. To: vito muggeo <vmuggeo at dssm.unipa.it> CC: r-help at stat.math.ethz.ch <r-help at stat.math.ethz.ch> References: <4405D98F.6030709 at dssm.unipa.it> vito muggeo wrote: > Dear all, > I am stuck on the following problem with integrate(). I have been out of > luck using RSiteSearch().. > > My...
2006 Feb 27
3
how to use the basis matrix of "ns" in R? really confused by multi-dim spline filtering?
Hi all, Could anybody recommend some easy-to-understand and example based notes/tutorials on how to use cubic splines to do filtering on multi-dimension data? I am confused by the 1-dimensional case, and more confused by multi-dimensional case. I found all the books suddenly become very abstract when it comes to this subject. They don't provide examples in R or Splus at all. Specifically,
2005 Nov 08
1
(no subject)
hello. My name is kerlim arturo. i was search into internet about R apache y PhP and i found your mail into foro. i want create a stadistic's software on line with language R,apache y php . i want know, what is the steps for developer this stadistic's software? where can i get information about language R, apache y php; and examples between language R and php ('source'). can I
2009 Jun 15
1
Linear Models: Explanatory variables with uncertainties
One of the assumptions, on which the (General) Linear Modelling is based is that the response variable is measured with some uncertainties (or weighted), but the explanatory variables are fixed. Is it possible to extend the model by assigning the weights to the explanatory variables as well? Is there a package for doing such a model fit? Thanks
2009 Jun 23
1
gradually switching regression
Hello, I'm trying to find an algorithm to estimate a switching regression model based on the 1990 Economics Letters paper by Ohtani/Kakimoto/Abe or the earlier version from 1985 (Ohtani/Katayama, Economic Studies Quarterly; assuming as a transition path a polynomial of order 1). I found an idea for using nls here: http://www.biostat.wustl.edu/archives/html/s-news/2000-04/msg00223.html.
2009 Jul 14
1
Linear Regression Problem
Dear All, I have a matrix say, X ( 100 X 40,000) and a vector say, y (100 X 1) . I want to perform linear regression. I have scaled X matrix by using scale () to get mean zero and s.d 1 . But still I get very high values of regression coefficients. If I scale X matrix, then the regression coefficients will bahave as a correlation coefficient and they should not be more than 1.
2011 Jan 18
2
Convert a matrix's columns to list
Dear R, Is there an efficient way to make a list that each element is from the corresponding column of a matrix. For example, if I have a matrix "a" > a <- matrix(1:10, 5, 2) > a [,1] [,2] [1,] 1 6 [2,] 2 7 [3,] 3 8 [4,] 4 9 [5,] 5 10 I would like to have a list "b" like this > b <- list(a[, 1], a[, 2]) > b [[1]] [1] 1 2 3
2011 Jan 18
1
Choosing statistical test - Fisher's Exact Test?
Hi I was wondering whether anyone can help me with this problem....it's been driving me nuts, I've been trying to figure it out for months and months without success!! Basically I have a group of participants who attended 2 experimental sessions a few months apart. I took measures of the way they approach two tasks at Time 1 and the same two tasks at Time 2. I have categorical data (a
2008 Dec 17
0
OFF topic testing for positive coeffs
...hich can give me any advices or suggest me references? Many thanks, vito -- ==================================== Vito M.R. Muggeo Dip.to Sc Statist e Matem `Vianelli' Universit? di Palermo viale delle Scienze, edificio 13 90128 Palermo - ITALY tel: 091 6626240 fax: 091 485726/485612 http://dssm.unipa.it/vmuggeo
2009 Sep 18
4
R on browser
Hi i can get sites that can r code on browser -- View this message in context: http://www.nabble.com/R-on-browser-tp25508719p25508719.html Sent from the R help mailing list archive at Nabble.com.