search for: nuverabio

Displaying 20 results from an estimated 50 matches for "nuverabio".

2007 May 16
2
'attach workspace' on R console File menu
...Attach Workspace... Load Workspace... Save Workspace... -------------------- Is this something that could make the wish list for future R Console features? Thanks. -Christos Christos Hatzis, Ph.D. Nuvera Biosciences, Inc. 400 West Cummings Park Suite 5350 Woburn, MA 01801 Tel: 781-938-3830 www.nuverabio.com <http://www.nuverabio.com/>
2006 Dec 04
2
Library file for the R engine in Windows?
...eeds to be built from source, but I am not sure if this is still the recommended route. I am using Microsoft Visual C++ Toolkit in Windows XP Pro. Thank you for any advice. Christos Hatzis, Ph.D. Nuvera Biosciences, Inc. 400 West Cummings Park Suite 5350 Woburn, MA 01801 Tel: 781-938-3830 www.nuverabio.com <http://www.nuverabio.com/> [[alternative HTML version deleted]]
2007 Dec 11
5
book on regular expressions
...ations/use as it might relate to R. I remember there was a mention of such a reference book recently, but I could not locate that message on the archive. Thanks. -Christos Christos Hatzis, Ph.D. Nuvera Biosciences, Inc. 400 West Cummings Park Suite 5350 Woburn, MA 01801 Tel: 781-938-3830 www.nuverabio.com <http://www.nuverabio.com/> [[alternative HTML version deleted]]
2005 Mar 26
4
RGUI font problem (PR#7749)
Full_Name: Christos Hatzis Version: 2.0.1 patched (2005-02-18) OS: WinXP SP2 Submission from: (NULL) (24.61.19.101) I had encountered a similar problem when changing the font in the R Console and then then open the graphics device by plot(), the console window whites out. this might be related to bug report 7271. I mentioned it sometime back and was told is was not reproducible. Now I have
2006 Oct 26
3
help fo finding R package "utils"
Sir I have a problem that from which country i can assess R package "utils" for data entry for loading it in R Please help me in this regard. -- AMINA SHAHZADI Department of Statistics GC University Lahore, Pakistan. Email: amnakhan493@gmail.com amna_989@hotmail.com amna_989@yahoo.com [[alternative HTML version deleted]]
2007 Feb 01
3
Lining up x-y datasets based on values of x
..., 2 ] <- x[,2] w[ xx >= y[1,1] & xx <= y[10,1], 3 ] <- y[,2] w[ xx >= z[1,1] & xx <= z[10,1], 4 ] <- z[,2] w I appreciate any pointers. Thanks. Christos Hatzis, Ph.D. Nuvera Biosciences, Inc. 400 West Cummings Park Suite 5350 Woburn, MA 01801 Tel: 781-938-3830 www.nuverabio.com
2006 Dec 03
1
passing matrix as argument to a C function
...of pointers to row vectors" concept, but I am not familiar enough in C yet to figure it out. Any hints on how in can be done with .Call if easier? Thank you. -Christos Christos Hatzis, Ph.D. Nuvera Biosciences, Inc. 400 West Cummings Park Suite 5350 Woburn, MA 01801 Tel: 781-938-3830 www.nuverabio.com <http://www.nuverabio.com/>
2006 Dec 24
2
how to 'get' an object that is part of a list
...de, inherits) : variable "xx$a" was not found > my.length(xx$a, xx$b) Error in get(x, envir, mode, inherits) : variable "xx$a" was not found Thank you. Christos Hatzis, Ph.D. Nuvera Biosciences, Inc. 400 West Cummings Park Suite 5350 Woburn, MA 01801 Tel: 781-938-3830 www.nuverabio.com
2009 Sep 10
1
importing/loading package without a namespace
...s not have a name space Error: package/namespace load failed for 'nvQC' Execution halted It looks like this package has a loading problem: see the messages for details. Christos Hatzis, Ph.D. Nuvera Biosciences, Inc. 400 West Cummings Park Suite 5350 Woburn, MA 01801 Tel: 781-938-3830 www.nuverabio.com <http://www.nuverabio.com/>
2006 Oct 24
2
Plotmath expression
...t work either: ll.txt <- paste(ll, collapse="+/-") text(x=9, y=2, pos=2, expression(paste(X[min], "=", ll.txt))) Any help is much appreciated. Thanks. Christos Hatzis, Ph.D. Nuvera Biosciences, Inc. 400 West Cummings Park Suite 5350 Woburn, MA 01801 Tel: 781-938-3830 www.nuverabio.com
2007 Feb 07
2
blank upper or lower triangle of cor-matrix
Dear altogether, I want to blank the lower (or upper) part of a correlation matrix as it is done by dist() example: ( d <- cor(matrix(runif(12),nrow=4)) ) If I do the following d[lower.tri(d)] <- "" of course everything is changed to character - that's not what should be. Additionally, it does not work to assign "0" or anything else. The same is true for
2006 Jul 17
10
String manipulation and formatting
I'm trying to write a simple function that does the following: [command] xify(5.2) [output] XXX.XX [command] xify(3) [output] XXX Any simple solutions (without using python/perl/unix script/...)? Thanks, Saghir --------------------------------------------------------- Legal Notice: This electronic mail and its attachments are i...{{dropped}}
2006 Dec 26
1
Colored Dendrogram
...------------------------------------------------------------------- > > Message: 1 > Date: Mon, 25 Dec 2006 08:33:54 -0500 > From: "Gabor Grothendieck" <ggrothendieck@gmail.com> > Subject: Re: [R] how to 'get' an object that is part of a list > To: christos@nuverabio.com > Cc: r-help@stat.math.ethz.ch > Message-ID: > <971536df0612250533n6ba6e8f4o75975036512154ae@mail.gmail.com> > Content-Type: text/plain; charset=ISO-8859-1; format=flowed > > my.length.2 also has the advantage of eliminating the eval. > > On 12/25/06, Christ...
2006 Nov 20
2
predict.coxph
Hi everyone, Can anyone give me more details about the 'lp', 'risk', 'terms', and 'expected' options from the predict.coxph function? I actually found that risk is obtained from exp(lp). I can't find information on 'expected' type however. Is anybody can expand the information on this function? Thank you in advance, I will appreciate it.
2007 Feb 01
1
Loading functions in R
Hi all, This information must be out there, but I can't seem to find it. What I want to do is to store functions I've created (as .R files or in whatever form) and then load them when I need them (or on startup) so that I can access without cluttering my program with the function code. This seems like it should be easy, but.... Thanks! Jeff
2007 Feb 02
1
Adding Histograms to Leaves of Rpart Tree or other Dendrogram
Hi - I'm trying to append simple density histograms of a continuous variable to the leaves of an rpart tree. The splits in the tree are all levels of a factor and I'm hoping to make the histograms out of the subsets of the dataframe corresponding to the splits and for them to be attached to the appropriate leaf of the final tree. Any help would be much appreciated, thanks, Jon Zelner
2007 Oct 09
1
Visualize cox proportional hazards
Hello all I would like to visualize the hazard ratios of a cox proportional hazards model. I have seen some good examples in the New England Journal of Medicine: http://content.nejm.org/cgi/content/short/353/26/2747/F3 http://content.nejm.org/cgi/content/short/350/26/2654/F2 (I hope these are open access, but I am not sure) And something similar in the book 'R Graphics' by Paul
2007 Apr 26
2
Extract p-value from survdiff function
Hi list, I want to use the p-value from the survdiff function (package survival) to reuse within a function in a Kaplan-Meier plot. The p-value is somehow not a component of the value list ?! Thanks in advance -- A. Goralczyk G?ttingen, Ger.
2006 Dec 26
4
vectorizing an iterative process.
Hi Everyone, I am stuck with a simple problem. Suppose I have a vector x, and I want to calculate y[i]=3Dx[i+1]-x[i], it is very easy. I just need to write y<-x[2:length(x)]-x[1:length(x)-1]. Now if I know y, and want to know the vector x defined by x[i]=3Dx[i-1]+y[i-1] for all i, how can I do this without a loop? Thanks, Geoffrey PS. Sorry if you see a duplicate message. The previous
2006 Jul 18
1
bilinear regression
I think this is an easy question, but I would be grateful for any advice on how to implement this in R. I simply have a response variable (y) that I am trying to predict with one explanatory variable (x) but the shape of the scatter plot is distinctly bilinear. It would be best described by two straight lines. Is there a way of fitting a linear model to give me a bilinear fit and (more