Displaying 14 results from an estimated 14 matches for "nayal".
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ayal
2003 Oct 02
3
EMACS/ESS problems
...t
(input/output). Anybody has had to deal with a similar situation. any
advice for a workaround? both emacs/ess are relatively recent versions
(installed a few months ago). I tried using ess-eval-buffer/region
instead of cutting and pasting and the same thing happens for me.
many thanks
--
Murad Nayal M.D. Ph.D.
Department of Biochemistry and Molecular Biophysics
College of Physicians and Surgeons of Columbia University
630 West 168th Street. New York, NY 10032
Tel: 212-305-6884 Fax: 212-305-6926
2004 Oct 13
2
debugging non-visible functions
...class", "matrix"), ...)
{
... deleted code ...
}
<environment: namespace:rpart>
> debug(predict.rpart,pos="package:rpart")
Error: Object "predict.rpart" not found
how can I 'debug' non-visible functions, like predict.rpart?
many thanks
Murad Nayal
2004 Jan 14
1
model-based clustering
...is available for R. I scanned CRAN packages and couldn't find
anything but I thought I'd ask. If not could anyone recommend a non-R
open source package. I have found 'snob' but this program seems a bit
hard to use in an automated, non interactive fashion.
regards,
Murad
--
Murad Nayal M.D. Ph.D.
Department of Biochemistry and Molecular Biophysics
College of Physicians and Surgeons of Columbia University
630 West 168th Street. New York, NY 10032
Tel: 212-305-6884 Fax: 212-305-6926
2003 Jul 21
1
help on barplot
...he left side a
bar plot of d[,1] is plotted while on the right side a separate bar plot
of d[,2] is plotted. how can I combine the two?
actually, while on the subject of histograms. is it possible to plot a
3D-histogram in R (a true 3D bar plot, without using image).
many thanks
Murad
--
Murad Nayal M.D. Ph.D.
Department of Biochemistry and Molecular Biophysics
College of Physicians and Surgeons of Columbia University
630 West 168th Street. New York, NY 10032
Tel: 212-305-6884 Fax: 212-305-6926
2003 Jul 17
6
Formal definitions of R-language.
Hello!
Some CS-guys (the type who knows what Church formalism is) keep asking
me questions about formal definitions of R-language that I can not
answer (or even understand). Is there some freely available papers which
I can throw at them where it would be explained is R
functional/OOP/procedural language, does it use weak/strong,
dynamic/static typization, does it use lazy or ...(do not know
2004 Jan 21
1
silhoutte.default bugs
...b.i <- diC[cbind(minC, seq(along=minC))]
s.i <- (b.i - a.i)/pmax(b.i, a.i)
wds[iC, "sil_width"] <- s.i
}
attr(wds, "Ordered") <- FALSE
attr(wds, "call") <- cll
class(wds) <- "silhouette"
wds
}
--
Murad Nayal M.D. Ph.D.
Department of Biochemistry and Molecular Biophysics
College of Physicians and Surgeons of Columbia University
630 West 168th Street. New York, NY 10032
Tel: 212-305-6884 Fax: 212-305-6926
2002 Oct 03
0
[Fwd: curiousity with hist]
just realized that the bin value is actually the relative frequency
divided by the bin width. sorry for consuming band width.
Alas, is there anyway to make hist() calculate relative frequencies
irrespective of bin width?
thanks
Murad Nayal wrote:
>
> Hello,
>
> I am rather new to R. in trying to use the hist() command I get behavior
> that is somewhat puzzling me, in short, for a vector 'data' of about
> 2000 elements ranging from -1,1 I do:
>
> hist(data,probability=TRUE)
>
> I get a histogr...
2003 Aug 25
2
lattice question
Hi,
I want to use (similar to) las options in lattice
(bwplot) plot. Actually I want to have x-axis labels
as vertical instead of default horizontal.
Thanks in advance for your help.
Mahbub
2003 Oct 23
0
anova model refinement/clustering question
...keyHSD output look like a dist object and trick hclust into using it.
I am somewhat of an amateur in the field (and R) and I am probably
making that obvious. any guidance to the 'right' path to approach this
(privately or on the list) is really appreciated.
many thanks
Murad
--
Murad Nayal M.D. Ph.D.
Department of Biochemistry and Molecular Biophysics
College of Physicians and Surgeons of Columbia University
630 West 168th Street. New York, NY 10032
Tel: 212-305-6884 Fax: 212-305-6926
2003 Nov 10
1
kmeans error (bug?)
Hello,
I have been getting the following intermittent error from kmeans:
>str(cavint.p.r)
num [1:1967, 1:13] 0.691 0.123 0.388 0.268 0.485 ...
- attr(*, "dimnames")=List of 2
..$ : chr [1:1967] "6" "49" "87" "102" ...
..$ : chr [1:13] "HYD" "NEG" "POS" "OXY" ...
> set.seed(34)
>
2003 Nov 16
1
graphics reset
...hence need to clear
the graphics completely before hand.
also, is there a way to restore the graphics parameters to default
values, say in these cases where you forgot to save the original values
and want to restore the graphics to some sane state after a long R
session.
many thanks
--
Murad Nayal M.D. Ph.D.
Department of Biochemistry and Molecular Biophysics
College of Physicians and Surgeons of Columbia University
630 West 168th Street. New York, NY 10032
Tel: 212-305-6884 Fax: 212-305-6926
2003 Nov 18
0
SVM question
...coverage values).
here i get mediocre accuracy but respectable coverage of "I". This is
not strictly an R question, but I thought someone on the list might have
had recent experience with these types of problems and can offer some
comments about such an approach.
many thanks
--
Murad Nayal M.D. Ph.D.
Department of Biochemistry and Molecular Biophysics
College of Physicians and Surgeons of Columbia University
630 West 168th Street. New York, NY 10032
Tel: 212-305-6884 Fax: 212-305-6926
2003 Jun 24
0
help on R programming.
> -----Original Message-----
> From: Murad Nayal [mailto:mn216 at columbia.edu]
> Sent: Tuesday, 24 June 2003 12:02 PM
> Cc: r-help at stat.math.ethz.ch
> Subject: [R] help on R programming.
>
>
>
>
> Hello all,
>
> I am looking for books to help me gain a firmer grasp on the S/R
> programming language , pro...
2003 Jun 18
3
Multiple graph sheets
In Splus the code
test.lm <- lm(y ~ x, data = test.data)
plot(test.lm)
generates a graphics window that contains
multiple graph sheets that one may choose
from via the "page" tabs at the bottom of
the window.
Is there a way to do this sort of thing in
R? As another example, I have some repeated
measures data with continuous outcomes and
have been working with the nlme library in