Displaying 20 results from an estimated 100 matches similar to: "samr-package: problem with large sample size multiclass data"
2008 Dec 05
0
determine assortative mixing in networks (igraph-library)
Dear all,
I'm looking for a method to quantify assortative mixing in undirected graphs, preferably something that is compatible with the igraph-library for network analysis. Is anybody aware of an already existing function/library for this or an easy way to implement this functionality in R?
Many thanks,
Rainer
WikipediaWictionaryChambers (UK)Google imagesGoogle defineThe Free
2005 Dec 26
0
problem with samr
Hello Everybody,
I am trying to perform SAM with the samr package.
I am using the following code:
sink ("R005")
library(siggenes)
library(samr)
library(nnet)
A <- as.matrix(read.table("D:\samrgenes1000.txt"))
B <- as.matrix(read.table("D:\genenames1000.txt"))
y1 <- c(rep(1,20),rep(2,6)) #there are 20 chips of one kind and 6 of the
other kind.
datasam =
2008 Jun 10
1
samr result
Hello list!
I have a proble trying to perform a SAM analysis using the function samr
from the samr package. I have put the option *center.arrays=TRUE *in order
to scale all the experiments to median=0. I would like to retrieved the
scaled data but it seems that samr does not return it...Does anyone have any
idea on this?
Thanks a lot!!!
E.
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2010 Aug 24
0
SAMR for paired samples
Hi R-help,
I am trying to use 'samr' for 10 pre and post paired samples to test
whether
post is different from pre (i.e., the location shift for the delta of
(post-pre)).
However, I got an error message saying
> samr.obj<-samr(d, resp.type="Two class paired", nperms=100,
random.seed=100)
perm= 1
Error in !logged2 : invalid argument type
Does anyone know what this
2011 Jul 01
0
new version of samr package
We have posted a major new version 2.0 of the samr package for large
scale significance testing, especially
for gene expression data. This new version handles RNA-seq data, using
the new method described in
http://www-stat.stanford.edu/~tibs/ftp/Li_Tibs.pdf
We have also added simple interface functions SAM and SAMseq.
Comments (and bug reports) welcome!
--
I get so much email that I might
2008 Jan 23
0
samr error
I'm running samr (Two class unpaired), but keep getting the following error:
perm= 1
Error in if (logged2) { : argument is of length zero
<code>
library (impute)
library (samr)
data = list (x=dat, y=y, geneid = matrix(twoUnpaired.data[,1],ncol=1),
genenames = matrix(twoUnpaired.data[,2], ncol=1))
samr.obj <- samr (data, resp.type="Two class unpaired", nperms=100)
2010 May 25
1
doubt about samr siggenes.table$genes.up
Hi, here's my siggenes.table$genes.up snippet.
Two class unpaired SAMR analysis.
"Row" "Gene ID" "Gene Name" "Score(d)" "Numerator(r)" "Denominator(s+s0)"
"Fold Change" "q-value(%)"
"1" "25" "RPL15P22" "RPL15P22" "-1.44115338424578" "-18"
2006 Jan 12
3
LSA and SAMR pipes in winbind client
As far as I saw, since some microsoft patch for AD, winbind client from
samba 3.0.14 (and prior versions) does not work properly for getting users
and groups from Active Directory. This problem was solved in 3.0.20. I saw
the following text in the samba 3.0.20 changelog:
"Disable schannel on the LSA and SAMR pipes in winbindd client code to deal
with Windows 2003 SP1 and Windows 2000 SP4
2011 Feb 09
1
samr - extract genes from siggenes.table
Hi BioC user,
I have a problem extracting the gene set I would like to work with.
Here is I work with my data:
normData <- read.delim("normalizedData.txt",sep ="\t")
######### two class unpaired comparison
# y must take values 1,2
classes <- c(-1,-2,1,2)
#prepere the data for the samr analysis
data.x <-as.matrix(normData[,8:11])
d=list(x=data.x,y=classes,
2011 May 30
0
how to interpret coefficients from multiclass svm using libsvm (for multiclass R-SVM)
Hello all,
I'm working with the svm (libsvm) implementation from library(e1071).
Currently I'm trying to extend recursive feature elimination (R-SMV) to
work with multiclass classification.
My problem is that if I run svm for a 3 class problem I get a 2-D vector
back from
model$coefs, can someone explain me what this values are? I understand them
in the 2-class problem
where this is a
2007 Sep 13
1
[LLVMdev] Nested multiclass/defm declarations?
Hi list,
I'm toying with the idea of writing a m680x0 backend for LLVM, and the
address modes of this chip are bewildering, to say the least. Here's a
rough list off wikipedia for reference:
* Register direct
o data register, e.g. "D0"
o address register, e.g. "A6"
* Register indirect
o Simple address, e.g. (A0)
o
2009 Feb 10
2
[LLVMdev] Multiclass patterns
Is there a way to define a multi-class pattern in tablegen?
Thanks,
Micah Villmow
Systems Engineer
Advanced Technology & Performance
Advanced Micro Devices Inc.
S1-609 One AMD Place
Sunnyvale, CA. 94085
P: 408-749-3966
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2009 Feb 10
0
[LLVMdev] Multiclass patterns
On Mon, Feb 9, 2009 at 5:17 PM, Villmow, Micah <Micah.Villmow at amd.com> wrote:
> Is there a way to define a multi-class pattern in tablegen?
>
Yes. See "multiclass" and "defm" in, say, X86Instr64bit.td, et al.
-bw
2009 Mar 24
3
[LLVMdev] Multiclass inheritance?
In TableGen, can multiclasses inherit from one another? I notice that there's
a lot of redundancy in the X86 .td files that could go away with multiclass
inheritance.
-Dave
2009 Mar 24
0
[LLVMdev] Multiclass inheritance?
On Mar 23, 2009, at 5:14 PM, David Greene wrote:
> In TableGen, can multiclasses inherit from one another? I notice
> that there's
> a lot of redundancy in the X86 .td files that could go away with
> multiclass
> inheritance.
Nope, not currently. That would be a nice feature though!
-Chris
2013 Mar 26
0
Error-correcting output code with multiclass problems
Hello,
I just wanted to know if there's any package that implements
error-correcting output code algorithms for multiclass ensemble
problems.
thank you in advance.
2017 Sep 02
0
problem in testing data with e1071 package (SVM Multiclass)
Hello all,
this is the first time I'm using R and e1071 package and SVM multiclass
(and I'm not a statistician)! I'm very confused, then. The goal is: I
have a sentence with sunny; it will be classified as "yes" sentence; I
have a sentence with cloud, it will be classified as "maybe"; I have a
sentence with rainy il will be classified as "no".
The
2009 Feb 10
0
[LLVMdev] Multiclass patterns
On Tue, Feb 10, 2009 at 8:27 AM, Villmow, Micah <Micah.Villmow at amd.com> wrote:
> Bill,
> Sorry if I wasn't clear enough. I wasn't referring to multiclass's that
> define other classes, but with using patterns inside of a multiclass to
> reduce redundant code.
> For example:
> multiclass IntSubtract<SDNode node>
> {
> def _i8 : Pat<(sub
2009 Feb 10
2
[LLVMdev] Multiclass patterns
Bill,
Sorry if I wasn't clear enough. I wasn't referring to multiclass's that
define other classes, but with using patterns inside of a multiclass to
reduce redundant code.
For example:
multiclass IntSubtract<SDNode node>
{
def _i8 : Pat<(sub GPRI8:$src0, GPRI8:$src1),
(ADD_i8 GPRI8:$src0, (NEGATE_i8 GPRI8:$src1))>;
def _i32 : Pat<(sub
2017 Aug 23
3
Extending TableGen's 'foreach' to work with 'multiclass' and 'defm'
On 08/23/2017 11:35 AM, Jakob Stoklund Olesen wrote:
>
>> On Aug 22, 2017, at 14:15, Hal Finkel via llvm-dev
>> <llvm-dev at lists.llvm.org <mailto:llvm-dev at lists.llvm.org>> wrote:
>>
>> For situations well beyond TableGen's current language capabilities,
>> we have a decision to make. We can continue extending TableGen until
>> it can