Displaying 20 results from an estimated 25 matches for "bccrc".

2007 May 14

2

lmer function

Does anyone know if the lmer function of lme4 works fine for unbalanced designs? I have the examination results of 1000 pupils on three subjects, one score every term. So, I have three scores for English (one for every term), three scores for maths etc. However, not everybody was examined in maths, not everybody was examined in English etc, but everybody was in effect examined on four subjects. I

2009 Jan 22

2

Is it possible for R to import a SigmaPlot file?

I recently received a Sigmaplot file (*.jnb) from a customer and would like to know if I can input it to a data frame and then manipulate the data in R.
I did a search on Google and on RSeek (www.rseek.org), but did not get any good hits. Thank for any feedback and insight you can provide.
P.S. Love the flexibility of R and would love to keep using it. Just wanting to know if this is

2008 Nov 28

2

AIC function and Step function

I would like to figure out the equations for calculating "AIC" in both
"step() function" and "AIC () function". They are different. Then I
just type "step" in the R console, and found the "AIC" used in "step()
function" is "extractAIC". I went to the R help, and found:
"The criterion used is
AIC = - 2*log L + k *

2007 Mar 21

2

problem with RCurl install on Unix

I am having trouble getting an install of RCurl to work properly on a
Unix server. The steps I have taken are:
1. installed cUrl from source without difficulty
2. installed RCurl from source using the command
~/R_HOME/R-devel/bin/R CMD INSTALL -l ~/R_HOME/R-devel/library
~/RCurl_0.8-0.tar.gz I received no errors during this install
3. when I go back to R and

2007 Mar 21

2

problem with RCurl install on Unix

I am having trouble getting an install of RCurl to work properly on a
Unix server. The steps I have taken are:
1. installed cUrl from source without difficulty
2. installed RCurl from source using the command
~/R_HOME/R-devel/bin/R CMD INSTALL -l ~/R_HOME/R-devel/library
~/RCurl_0.8-0.tar.gz I received no errors during this install
3. when I go back to R and

2011 Aug 23

3

Bug or feature? sum(c(a, b, c)) != (a + b + c)

Greetings all,
I'm porting an algorithm from MATLAB to R, and noticed some minor
discrepancies in small decimal values using rowSums and colSums which
are exacerbated after heavy iteration and log space transformation.
This was rather perplexing as both programs claimed and appeared to use
the IEEE 754 standard for floating point arithmetic (confirmed with
manual basic operations).

2009 Jan 14

2

coercing a list into matrix

Dear list,
I have a list of number sequences. Each number sequence has different
numbers of elements. Is there a quick way (other than to iterate
through the entire list) way to coerce list to matrix with NAs filling
in the short sequences?
An example of what I mean is this:
A <- list(c(3,2,3),c(6,5))
I'd like to get A so that it is
3 2 3
6 5 NA
Best,
Ken

2009 Mar 30

1

what is R equivalent of Fortran DOUBLE PRECISION ?

I noticed taht R cannot understand certain Fortran real constant formats. For instance:
c14 <- as.double( 7.785205408500864D-02)
Error: unexpected symbol in " c14 <- as.double( 7.785205408500864D"
The above "D" is used in Fortran language to indicate the memory starage mode. That is for instructing Fortran compiler
to store such a REAL constant in DOUBLE

2011 Apr 08

4

Fast version of Fisher's Exact Test

Is anyone aware of a fast way of doing fisher's exact test for a series of 2
x 2 tables in R? The fisher.test is really slow if n1=1000 and n2 = 1000.
--
Thanks,
Jim.
[[alternative HTML version deleted]]

2007 Oct 25

3

Deparsing part of a list argument

Here's a simple example of the type of function I'm trying to write,
where the first argument is a list of functions:
myfun <- function(funlist, vec){
tmp <- lapply(funlist, function(x)do.call(x, args = list(vec)))
names(tmp) <- names(funlist)
tmp
}
> myfun(list("Summation" = sum, prod, "Absolute value" = abs), c(1, 4, 6, 7))
$Summation
[1]

2008 Sep 03

1

lattice command equivalent to points

Hello,
This is my first post to R-help so forgive me if I'm committing a fatal error somehow. Feel free to let me know.
My question is this: I would like to add a triangle to represent the mean in a box plot generated with the bwplot command. How do I do this? I am able to do this using the boxplot and points command but points does not work with bwplot. If you run the following code

2007 Apr 17

3

Extracting approximate Wald test (Chisq) from coxph(..frailty)

Dear List,
How do I extract the approximate Wald test for the
frailty (in the following example 17.89 value)?
What about the P-values, other Chisq, DF, se(coef) and
se2? How can they be extracted?
######################################################>
kfitm1
Call:
coxph(formula = Surv(time, status) ~ age + sex +
disease + frailty(id,
dist = "gauss"), data = kidney)

2008 Aug 01

2

source a script file straight from a subversion repository

Hi useRs
I'm trying to figure out how to source
an R script file straight from a subversion
repository, without having to put a copy
of the script into the local working directory.
Has anyone done this?
Something such as
source(file = paste("svn://myrepo.xxx.org/opt/svn/repos/",

2008 Jul 26

1

64-bit R on Mac OS X 10.4.5

Hello
I have a Mac OS X 10.4.5. I am trying to build a 64-bit R by following the directions on this page: http://r.research.att.com/building.html
r_arch=x86_64 \
CC="gcc -arch x86_64 -std=gnu99" \
CXX="g++ -arch x86_64" \
OBJC="gcc -arch x86_64" \
F77="gfortran -arch x86_64" \
FC="gfortran -arch x86_64"

2010 Dec 02

5

Tukey Test, lme, error: less than two groups

Dear R-group,
I am trying desperately to get this Tukey test working. Its my first time
here so I hope my question is not too stupid, but I couldn't find anything
helpful in the help or in the forum.
I am analysing a dataset of treated grasses. I want to find out, if the
grasses from different Provenances react differently.
In the aov test I found a significance for the combination Treatment

2009 Apr 01

0

回复： R-help Digest, Vol 73, Issue 32

...lp
> PLEASE do read the posting guide
> http://www.R-project.org/posting-guide.html
> and provide commented, minimal, self-contained,
> reproducible code.
------------------------------
Message: 87
Date: Mon, 30 Mar 2009 19:45:03 -0700
From: Steven McKinney <smckinney@bccrc.ca>
Subject: Re: [R] what is R equivalent of Fortran DOUBLE PRECISION ?
To: <mauede@alice.it>, <r-help@r-project.org>
Cc: "John C. Nash" <nashjc@uottawa.ca>
Message-ID:
<0BE438149FF2254DB4199E2682C8DFEB0328A683@crcmail1.BCCRC.CA>
Content-Type: text/plai...

2006 Apr 03

2

about arguments in "bclust"

Hi All,
Just want to make sure, in function "bclust", do the following argument
only have one option?
argument "dist.method" has one option "Euclidian";
argument "hclust.method" has one option "average";
argument "base.method" has one option "kmeans".
Thank you!
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2006 Mar 17

0

(no subject)

Hi there,
I notice that some of the clustering methods in R are not appropriate to
deal with large data set. Here is the list I make to see which are
appropriate or which are not appropriate for large dataset. Could you
please take a look and check if it is right or not? I need this
information to decide which methods I should choose.
Thank you!
P.S.: List:
Appropriate for large

2006 Mar 20

1

plot and validation in clustering

Hi there,
I use function "kmeans" and "clara" to cluster one flow cytometry
dataset. By using function "plot", the clusters got from "clara" can be
graphed, while "kmeans" not. How can I get the plot of the clusters of
"kmeans"?
And, I hope to compare the two methods "kmeans" and "clara", or in other
word, I

2008 May 02

1

adjusting plot vs font size in a plot

Hello:
I am using plot() in rpart, making a decision tree plot. I use plot()
first, then text() followed, but I think due to the figure vs. text
size, the bottom of the text always gets cut off. I can only "see" the
text of the bottom of the tree if I make the font size REALLY small.
I think is shouldn't be a specific rpart question, but rather a general
plotting technique