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33 results for “from:Nikos Alexandris”

productivity tools in R?
Nikos Alexandris · Jul 2, 2009 · r-help

On Thu, 2009-07-02 at 00:01 -0500, Gene Leynes wrote: > playwith(xyplot(z3), time.mode = TRUE) WoW! Looks (and is) GrEaT! Nikos

Best R text editors?
Nikos Alexandris · Sep 11, 2009 · r-help

[Answering to the threads question] For those who use Gnome's gedit, there is now RGedit: http://sourceforge.net/projects/rgedit Apologies if this was already posted, Nikos

Odp: Define column names to a series of data.frames
Nikos Alexandris · Mar 12, 2010 · r-help

Thanks to all for the replies. I'll post back here when I get things working (...in a couple of days). Nikos

How to export/save an "mrpp" object?
Nikos Alexandris · Jan 7, 2011 · r-help

Gavin: [...] > I think you should read ?load to rethink what these functions do and how > they do it. [...] Absolutely correct. I will. Thank you for your time Gavin, Nikos

Help on creating a sequence of vectors
Nikos Alexandris · Jun 22, 2009 · r-help

megh: > I want to create a number of vectors like : > > vec1 <- rnorm(1) > vec2 <- rnorm(2) > vec3 <- rnorm(3) > > and so on........... Maybe try the assign() function. Something like: for (i in 1:10) assign ( paste ( "vec" , i , sep = "" ) , rnorm...

c(), or cat(), or paste(), all cause unwanted reordering
Nikos Alexandris · Apr 6, 2010 · r-help

On Thu, 2010-03-25 at 11:54 -0800, Jeff Brown wrote: > Wow, you guys are awesome. Thanks! Thanks for the "cat()" question Jeff and to all guRus out there for the replies. This is something I was looking for...

Attempt to customise the "plotpc()" function
Nikos Alexandris · May 15, 2010 · r-help

On Saturday 15 of May 2010 19:09:30 Nikos Alexandris wrote: > Among the (R-)tools, I've seen on the net, for (bivariate) Principal > Component scatter plots (+histograms), "plotpc" [1] is the one I like > most. [...] [1] <http://cran...

Estimate "between-axes" vs "within-axes heterogeneity of multivariate matrices
Nikos Alexandris · Dec 22, 2010 · r-help

On Wednesday 22 of December 2010 05:57:17 Nikos Alexandris wrote: [...] > Apologies for repeating the same question (trying to understand the problem > myself). I started to get a grip on this. But anyway, my questions are actually not directly...

How to export/save an "mrpp" object?
Nikos Alexandris · Jan 6, 2011 · r-help

Greets (again) :-) I finally ran mrpp tests. I think all is fine but one very important issue: I have no idea how to export/save an "mrpp" object. Tried anything I know and searched the archives but found nothing. Any...

why is 0 not an integer?
Nikos Alexandris · Aug 5, 2009 · r-help

On Wed, 2009-08-05 at 13:16 -0700, Steve Jaffe wrote: > Why when I assign 0 to an element of an integer vector does the type change > to numeric? > Here is a particularly perplexing example: > > v <- 0:10 > > v...

Bhattacharyya distance metric
Nikos Alexandris · Nov 5, 2009 · r-help

On Thu, 2009-11-05 at 12:25 -0800, Diana Garrett wrote: > I need to use the Bhattacharyya distance metric to determine population > separation. Has anyone written a Bhattacharyya distance metric function in > R? Something like this ( I think it...

Attempt to customise the "plotpc()" function
Nikos Alexandris · May 16, 2010 · r-help

Peter Ehlers wrote: > > and then use the rest of the plotpc() code as is (except for > > maybe having to use flip1=TRUE, etc). Nikos: > Hmm... I am _now_ working on it to understand how I could make this > "automatic"!. > > If...

How to plot hyperbolic iso-lines of a cost function?
Nikos Alexandris · Jun 12, 2009 · r-help

Hi R-specialists! I would like to draw some hyperbolic (iso-)lines of a cost function in a bi-dimensional space ( =shapes of a cost function ), based on (the general form): C(x) = c1*Ce + c2*Oe + c3*{ 1 - [ (1...

GRASS raster data processing
Nikos Alexandris · Jun 11, 2009 · r-help

Maayt: > I just imported two raster maps into R using the SPGRASS6 package, one > containing elevation data and the other containing an erosion index: > Kar_inc <-readRAST6("Incis_Kar", plugin=FALSE) > Kar_dem <- readRAST6("DEM_Kar", plugin=FALSE) > > I just...

Define column names to a series of data.frames
Nikos Alexandris · Mar 19, 2010 · r-help

Nikos Alexandris wrote: ... > >>> I have 6 data frames consisting of 6 rows x 7 columns put together from > >>> other data.frames. ... > >>> I want to give the following column names to each data.frame: ("SDev", > >>> "PC1", "PC2", "PC3", "PC4", "PC5", "PC6...

labeling in qplot
Nikos Alexandris · Aug 5, 2009 · r-help

On Tue, 2009-08-04 at 20:16 -0700, Mohan S wrote: > HI > > am plotting different density plots in one graph each with a different > color. > > And i want to add labels to plot mentioning which color belongs to which...

c(), or cat(), or paste(), all cause unwanted reordering
Nikos Alexandris · Apr 6, 2010 · r-help

Jeff Brown wrote: > > Wow, you guys are awesome. Thanks! Nikos Alexandris wrote: > Thanks for the "cat()" question Jeff and to all guRus out there for the > replies. This is something I was looking for the last hour. I can't...

Define column names to a series of data.frames
Nikos Alexandris · Mar 11, 2010 · r-help

Greets to the list! I am aware that this topic has been discussed several times. And I've read quite some related posts [1]. Yet, can't seem to give a solution to my problem. I have 6 data frames...

c(), or cat(), or paste(), all cause unwanted reordering
Nikos Alexandris · Apr 6, 2010 · r-help

On Tue, 2010-04-06 at 19:29 +0200, Nikos Alexandris wrote: > Jeff Brown wrote: > > > Wow, you guys are awesome. Thanks! > > Nikos Alexandris wrote: > > Thanks for the "cat()" question Jeff and to all guRus out there for the > > replies. This...

Estimate "between-axes" vs "within-axes heterogeneity of multivariate matrices
Nikos Alexandris · Dec 21, 2010 · r-help

Hi! My question(s) in the end might be silly but I am no expert on this, so here it goes: Noy-Meir (1973), Pielou (1984) and a few others have pointed to non-centered PCA being in some cases...

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