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245 results for “from:Charilaos Skiadas”

Integration + Normal Distribution + Directory Browsing Processing Questions
Charilaos Skiadas · Jan 21, 2007 · r-help

On Jan 21, 2007, at 2:27 PM, Nils Hoeller wrote: > Now I want R to read.table all files within a given directory and > process them one by the other. ?list.files ?"for" Haris

Reasons to Use R
Charilaos Skiadas · Apr 11, 2007 · r-help

A new fortune candidate perhaps? On Apr 10, 2007, at 6:27 PM, Greg Snow wrote: > Remember, everything is better than everything else given the right > comparison. > > -- > Gregory (Greg) L. Snow Ph.D. Haris Skiadas Department of Mathematics and Computer...

Weighting data when running regressions
Charilaos Skiadas · Mar 10, 2008 · r-help

On Mar 10, 2008, at 7:49 AM, Elena Wilson wrote: > > linmod=lm(Y~X1+X2+X3+X4W, subset=(X5==1 & X6==7), weights==WEIGHT) That should likely be weights=WEIGHT, with one equal sign. Haris Skiadas Department of Mathematics...

Mean in bwplot
Charilaos Skiadas · Mar 23, 2008 · r-help

On Mar 23, 2008, at 1:37 PM, Charilaos Skiadas wrote: > panel.points(mean(x), y, col="red", ...) Correction, this should have probably been: panel.points(tapply(x, y, mean), y, col="red", ...) All this assuming you want horizontal boxplots...

Rest of a division
Charilaos Skiadas · Jun 13, 2008 · r-help

?"%%" On Jun 13, 2008, at 11:23 AM, Eric Ferreira wrote: > Dear useRs, > > How do I ask for the rest of a division? > > For instantce, in C is like: > > 4%2 = 0 > > Best regards, > > -- > Eric B Ferreira > Exact Sciences Department...

Scope
Charilaos Skiadas · Feb 8, 2007 · r-help

On Feb 8, 2007, at 4:52 PM, Roger Bivand wrote: > Assigning to > the global environment will overwrite objects unless one is > careful, and > even with years of experience only seems worth considering when no > feasible alternative exists; on consideration...

How to test if t[["cat"]] exists ?
Charilaos Skiadas · Apr 15, 2008 · r-help

On Apr 15, 2008, at 9:53 PM, Ng Stanley wrote: > Hi, > >> t <- list("cat"=1) >> exists("t") > [1] TRUE >> exists("t[["cat"]]") > Error: unexpected symbol in "exists("t[["cat" >> exists("t[[\"cat\"]]") > [1] FALSE Perhaps what you want is...

substitute NA values
Charilaos Skiadas · Mar 30, 2007 · r-help

On Mar 30, 2007, at 10:56 AM, Gavin Simpson wrote: > This is R, there is always a way (paraphrasing an R-Helper the name of > whom I forget just now). Can't resist, it's one of my favorite...

Geometric progression
Charilaos Skiadas · Feb 24, 2008 · r-help

On Feb 24, 2008, at 9:36 PM, Andre Nathan wrote: > On Sun, 2008-02-24 at 23:26 -0300, Andre Nathan wrote: >>> gp(1, 2, 10) >> [1] 1 2 4 8 16 32 64 128 256 512 1024 >> > > Actually...

Reference to dataframe and contents
Charilaos Skiadas · Feb 4, 2007 · r-help

On Feb 4, 2007, at 3:42 PM, Rene Braeckman wrote: > My question is how to construct the equivalent of myDF$myCol that > can be > used as such. Or is there a better solution? > I think what you want is...

R-Logo in \LaTeX
Charilaos Skiadas · Mar 6, 2008 · r-help

On Mar 6, 2008, at 1:49 PM, Mag. Ferri Leberl wrote: > Dear everybody! > Is there a command in \LaTeX to display the R-Logo or has anybody > made it up? > Thank you in advance. Isn't it just an...

Format integer
Charilaos Skiadas · May 12, 2008 · r-help

On May 12, 2008, at 5:22 PM, Anh Tran wrote: > Hi, > What's one way to convert an integer to a string with preceding 0's? > such that > '13' becomes '00000000013' > to be put into a string > > I've...

rgeom for p (1-p)^(x-1)
Charilaos Skiadas · Mar 14, 2007 · r-help

On Mar 14, 2007, at 8:44 AM, Benjamin Dickgiesser wrote: > Hi, > > is there a package available which lets me generate random data for > the geometric distribution with density: > > p(x) = p (1-p)^(x-1) ? > > rgeom uses the density...

How to format R code in LaTex documents
Charilaos Skiadas · Jan 15, 2007 · r-help

On Jan 15, 2007, at 8:42 AM, Benjamin Dickgiesser wrote: > Hi, > > I am planning on putting some R script in an appendix of a LaTex > document. Can anyone recommend me a way of how to format it? Is there...

someattributes
Charilaos Skiadas · Feb 26, 2007 · r-help

On Feb 26, 2007, at 10:35 AM, Thaden, John J wrote: > I'd like to use someattributes(), as described > in documentation for R version 2.4.1 (windows build) > >> help("attributes") > > however, someattributes() does not seem to exist. > >> someattributes...

someattributes
Charilaos Skiadas · Feb 26, 2007 · r-help

On Feb 26, 2007, at 3:00 PM, Thaden, John J wrote: > Thanks for correcting me. Actually, my windows > R documentation says "mostattributes()", but it > makes no difference -- none of the three show > up as function names or R objects...

Sealed for setGeneric
Charilaos Skiadas · Mar 13, 2008 · r-help

On Mar 13, 2008, at 5:04 AM, Christophe Genolini wrote: > Hi the list > > When two setGeneric occurs on the same function, the second erage the > first and erase all the function previously define. > Is it possible to prevent that...

Making a case for using R in Academia
Charilaos Skiadas · Nov 9, 2006 · r-help

As a addendum to all this, this is one of the responses I got from one of my colleagues: "The problem with R is that our students in many social science fields, are expected to know SPSS when they go...

keywords
Charilaos Skiadas · Jul 29, 2008 · r-help

On Jul 29, 2008, at 5:24 AM, Edna Bell wrote: > Hi R Gurus! > > When you build a package, you need to put in keywords in the Rd files. > > Where would you find the list of keywords, please? Simplest way...

Proper way to typeset the symbol for R in LaTeX?
Charilaos Skiadas · Feb 15, 2007 · r-help

Hoping this is not off topic... I am in the process of writing some tutorials for my students for learning R, and naturally I'm using Sweave for this. So suddenly a question occurred to me: LaTeX has a recommended...

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