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257 results for “from:Christos Hatzis”

Sparse PCA in R
Christos Hatzis · Mar 10, 2009 · r-help

Take a look at the elasticnet package. -Christos > -----Original Message----- > From: r-help-bounces at r-project.org > [mailto:r-help-bounces at r-project.org] On Behalf Of joris meys > Sent: Tuesday, March 10, 2009 3:43 PM > To...

textured dot strips
Christos Hatzis · Apr 28, 2009 · r-help

Hello, Is there an R package that can generate symmetric textured dot strips such as those shown in the attached pdf? This particular variation of strip charts was first described in Tukey J and Tukey P (1990). Strips displaying empirical...

variable labels in pairs
Christos Hatzis · Apr 25, 2006 · r-help

Hello, I am using 'pairs' to produce a scatter plot matrix with a custom upper.panel function to plot the Pearson's correlation coefficients for the pairs of variables. I would like to be able to use the actual variable...

Linear Discriminant Analysis
Christos Hatzis · Feb 25, 2009 · r-help

Maybe as a starter RSiteSearch("linear discriminant analysis") R has tools to help you help yourself with this types of questions. -Christos > -----Original Message----- > From: r-help-bounces at r-project.org > [mailto:r-help-bounces at r-project.org...

String manipulation and formatting
Christos Hatzis · Jul 17, 2006 · r-help

See ?formatC You might need to write a simple wrapper function to implement the interface that you want. -Christos -----Original Message----- From: r-help-bounces at stat.math.ethz.ch [mailto:r-help-bounces at stat.math.ethz.ch] On...

How to obtain the estimate of baseline survival function?
Christos Hatzis · Nov 3, 2006 · r-help

See ?basehaz in 'survival' package. -Christos -----Original Message----- From: r-help-bounces at stat.math.ethz.ch [mailto:r-help-bounces at stat.math.ethz.ch] On Behalf Of Zheng Yuan Sent: Friday, November 03, 2006 6:20 PM To...

multiple plots in the same graph
Christos Hatzis · Nov 3, 2006 · r-help

See ?points and ?lines for adding new groups of points or lines to an existing graph created by plot. -----Original Message----- From: r-help-bounces at stat.math.ethz.ch [mailto:r-help-bounces at stat.math.ethz.ch] On...

Matrix conversion question
Christos Hatzis · Mar 9, 2007 · r-help

Try split(x, row(x)) -Christos > -----Original Message----- > From: r-help-bounces at stat.math.ethz.ch > [mailto:r-help-bounces at stat.math.ethz.ch] On Behalf Of > Johannes Graumann > Sent: Friday, March 09, 2007 10:30 AM > To...

extract the digits of a number
Christos Hatzis · Dec 9, 2008 · r-help

An alternative that works for any base (other than 10) is the following: > library(sfsmisc) > digitsBase(1001, 10) Class 'basedInt'(base = 10) [1:1] [,1] [1,] 1 [2,] 0 [3,] 0 [4,] 1 -Christos > -----Original Message----- > From: r-help-bounces...

R icon image file
Christos Hatzis · Mar 15, 2006 · r-help

http://www.r-project.org/Rlogo.jpg -----Original Message----- From: r-help-bounces at stat.math.ethz.ch [mailto:r-help-bounces at stat.math.ethz.ch] On Behalf Of Erin Hodgess Sent: Wednesday, March 15, 2006 2:39 PM...

john chambers R book
Christos Hatzis · Jul 30, 2008 · r-help

I just received mine today (had pre-ordered it directly from Springer) -Christos > -----Original Message----- > From: r-help-bounces at r-project.org > [mailto:r-help-bounces at r-project.org] On Behalf Of > markleeds at verizon.net > Sent: Wednesday...

remove Punctuation characters
Christos Hatzis · May 9, 2006 · r-help

Try gsub('[[:punct:]]', '', str) -Christos -----Original Message----- From: r-help-bounces at stat.math.ethz.ch [mailto:r-help-bounces at stat.math.ethz.ch] On Behalf Of Filipe Almeida Sent: Tuesday, May 09, 2006 11:51 AM To: r...

Lining up x-y datasets based on values of x
Christos Hatzis · Feb 1, 2007 · r-help

Hi, I was wondering if there is a direct approach for lining up 2-column matrices according to the values of the first column. An example and a brute-force approach is given below: x <- cbind(1:10, runif(10...

Plotmath expression
Christos Hatzis · Oct 24, 2006 · r-help

Hello, I've been trying to plot a subscript in a text formula using plotmath but I haven't been able to do so. In my example below I would like the text label to show X[min] = 10.1...

inserting columns in the middle of a dataframe
Christos Hatzis · Sep 13, 2006 · r-help

See ?append -Christos -----Original Message----- From: r-help-bounces at stat.math.ethz.ch [mailto:r-help-bounces at stat.math.ethz.ch] On Behalf Of Jon Minton Sent: Wednesday, September 13, 2006 5:14 PM To: r-help at...

Removing vertical line in Tinn R editor
Christos Hatzis · Jun 6, 2007 · r-help

Go to Options/Main/Editor Click on EdgeColor and select white as the color (or to whatever color you have set your page's background). This will make the edge line disappear. -Christos > -----Original Message----- > From: r-help-bounces at...

re-coding variables
Christos Hatzis · Feb 2, 2006 · r-help

Look at function recode() in library("car"). -Christos -----Original Message----- From: r-help-bounces at stat.math.ethz.ch [mailto:r-help-bounces at stat.math.ethz.ch] On Behalf Of Marc Bernard Sent: Thursday, February 02, 2006 11:12...

Select the last two rows by id group
Christos Hatzis · Mar 20, 2007 · r-help

You can try the following: n.len <- nrow(iris) n.sel <- 3 iris[(n.len-n.sel+1):n.len, ] -Christos > -----Original Message----- > From: r-help-bounces at stat.math.ethz.ch > [mailto:r-help-bounces at stat.math.ethz...

passing matrix as argument to a C function
Christos Hatzis · Dec 3, 2006 · r-devel

Thank you, Dirk. I'll keep this in mind. -Christos -----Original Message----- From: Dirk Eddelbuettel [mailto:edd at debian.org] Sent: Sunday, December 03, 2006 12:47 PM To: christos at nuverabio.com Cc: 'Prof Brian Ripley'; r-devel at...

which.minimums not which.min
Christos Hatzis · Mar 15, 2006 · r-help

Try order(x, decreasing=TRUE/FALSE) -----Original Message----- From: r-help-bounces at stat.math.ethz.ch [mailto:r-help-bounces at stat.math.ethz.ch] On Behalf Of Fred J. Sent: Wednesday, March 15, 2006 2:32 PM To...

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