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245 results for “from:Charilaos Skiadas”

How to pass variable of for loop on read table text
Charilaos Skiadas · May 23, 2008 · r-help

?paste paste('text',y,'.txt', sep="") and you likely need data[[y]] instead of data$y. On May 23, 2008, at 9:05 PM, Jason Lee wrote: > Hi, > > I have a couple of text and would like to automate of...

returns from dnorm and dmvnorm
Charilaos Skiadas · Feb 26, 2007 · r-help

On Feb 26, 2007, at 3:03 PM, A Hailu wrote: > Hi All, > Why would calls to dnorm and dmvnorm return values that are above > 1? For > example, >> dnorm(0.00003,mean=0, sd=0.1) > [1] 3.989423 Because...

question about xtable and Hmisc
Charilaos Skiadas · Mar 1, 2007 · r-help

Sorry, meant for this to go to the whole list. On Mar 1, 2007, at 3:29 PM, Charilaos Skiadas wrote: > On Mar 1, 2007, at 2:52 PM, steve wrote: > >> Unfortunately, this applies to print.xtable, and not to...

NEWBIE: @BOOK help?
Charilaos Skiadas · Feb 8, 2007 · r-help

On Feb 8, 2007, at 11:07 AM, Zembower, Kevin wrote: > In Henric's recent post, he included this output: > > @BOOK{R:Harrell:2001, > AUTHOR = {Frank E. Harrell}, > TITLE = {Regression Modeling Strategies, with Applications to > Linear Models, Survival Analysis and...

Problem with scatter plotting
Charilaos Skiadas · May 29, 2008 · r-help

On May 29, 2008, at 9:56 PM, lek2k wrote: > PLEASE do read the posting guide http://www.R-project.org/posting- > guide.html > and provide commented, minimal, self-contained, reproducible code. I (and certainly many others) have been using...

Manual recycling of vectors?
Charilaos Skiadas · Oct 19, 2007 · r-help

Sorry if this is already answered somewhere, but I could not find it. I have two vectors, x,y, of different length, and I want to recycle the smaller one (whichever one it is) until they have the same length...

Formating numbers
Charilaos Skiadas · May 5, 2008 · r-help

On May 5, 2008, at 7:03 AM, pecardoso wrote: > Maybe a very, very basic question but how can I get a vector of > values with the specific format: > 001,002,010,100 > > instead of: > 1,2,10,100 Not...

problem with function "rep"
Charilaos Skiadas · Jun 12, 2008 · r-help

On Jun 12, 2008, at 10:48 AM, Julien Hunt wrote: > Do you > need more information on my specific program. > Thanks for your time and help, Yes, as the posting guide says, we would probably need a reproducible self-contained...

save p-value in mshapiro.test(mvnormtest)
Charilaos Skiadas · Nov 16, 2007 · r-help

On Nov 16, 2007, at 8:04 PM, Jiao Yang wrote: > Dear all, > > I want to save the p-value from mshapiro.test(mvnormtest). But > mshapiro.test(mvnormtest) gives a list with class "htest" > containing statistic, p.value, method and...

read.spss (package foreign) and SPSS 15.0 files
Charilaos Skiadas · Apr 6, 2007 · r-help

On Apr 6, 2007, at 12:32 PM, John Kane wrote: > I have simply moved to exporting the SPSS file to a > delimited file and loading it. Unfortunately I'm > losing all the labelling which can be time-consuming > to...

How to navigate in layout() created graph?
Charilaos Skiadas · Mar 7, 2008 · r-help

On Mar 7, 2008, at 8:41 AM, Rainer M Krug wrote: >> >> I'm not sure I understand it, why don't you want to just number the >> subfigures in the order in which you will draw them? > > Because i...

How to change the class of data?
Charilaos Skiadas · Jun 11, 2008 · r-help

On Jun 12, 2008, at 2:24 AM, Qman Fin wrote: > Hi all, > > I have some data x, which are actualy consisted of numerical > enties. But the > class of this matrix is set to be "factor" by someone else. I...

efficient code. how to reduce running time?
Charilaos Skiadas · Jan 21, 2007 · r-help

On Jan 21, 2007, at 5:55 PM, miraceti wrote: > Thank you all for lookin at it. > I'll fix the code to preallocate the objects. > and I wonder if there is a way to call anova on all the...

locate the rows in a dataframe with some criteria
Charilaos Skiadas · Mar 7, 2008 · r-help

On Mar 7, 2008, at 10:50 AM, zhihuali wrote: > > Hi, netters, > > This is probably a rookie question but I couldn't find the answer > after hours of searching and trying. > > Suppose there'a a dataframe M: > > x y > 10...

Indexing, and using an empty string as a name
Charilaos Skiadas · Nov 6, 2007 · r-help

Hello all, I ran into the following, to me unexpected, behavior. I have (for reasons that don't necessarily pertain to the question at hand, hence I won't go into them) the need/desire to use an empty string...

Help with paste()
Charilaos Skiadas · Mar 3, 2007 · r-help

On Mar 3, 2007, at 2:29 PM, Michael Kubovy wrote: > Dear r-helpers, > > Could you please tell me what's missing: > rbind(paste('txt.est',1:24, sep = '')) > txt.est1, ... txt.est24 are vectors that I wish to rbind...

Cannot grasp how to apply "by" here...
Charilaos Skiadas · Dec 17, 2007 · r-help

On Dec 17, 2007, at 1:47 PM, Jonas Malmros wrote: > factor.names <- c("Factor1", "Factor2") > factor.pvalue <- c("SigF1", "SigF2") > results <- numeric() > vector <- matrix(0, ncol=(length(factor.names)*2+2), nrow=1) > colnames(vector) <- c("No.obs", factor...

Flipping a vector
Charilaos Skiadas · Mar 17, 2007 · r-help

On Mar 17, 2007, at 10:52 PM, adschai at optonline.net wrote: > Hi all - A stupid question here, my apology. I would like to know > how can I flip a vector in R? For example, I have a vector...

can I do this with R?
Charilaos Skiadas · May 28, 2008 · r-help

A google search for "logistic regression with stepwise forward in r" returns the following post: https://stat.ethz.ch/pipermail/r-help/2003-December/043645.html Haris Skiadas Department of Mathematics and Computer Science Hanover College On May 28, 2008...

How do I create an object in the Global environment from a function
Charilaos Skiadas · Dec 14, 2006 · r-help

On Dec 14, 2006, at 7:42 AM, Rainer M Krug wrote: > myfunc <- function() b <<- 34 I would add a warning here. It is generally not a good idea for a function to have side-effects. In this case, if...

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