Displaying 20 results from an estimated 200 matches similar to: "clustering of binary data"
2010 Jun 21
1
[LLVMdev] Extracting Metadata of Variables
Hi,
Im new to llvm and I'm using llvm-2.6 and I know how to extract the metadata
in the stoppoints but what I'm interested in is the meta data regarding a
local variable. I know that the @llvm.dgb.declare such as:
call void @llvm.dbg.declare({ }* %2, { }* bitcast (%llvm.dbg.variable.type*
@llvm.dbg.variable9 to { }*))
links to meta data for @llvm.dbg.variable9 which is:
2001 May 09
2
[Newbie] Row-Iterator for data.frame??
hello all,
for my diploma-thesis i want to statitically analyze near-infrared-spectra.
a spectrum is given by the y-values of 1038 equi-distant x-points.
in nature, a spectrum is a continuous curve. for analysis, every x-point
is seen as a statistical variable.
now my problem:
first, i read a csv-table in a data.frame called sTable via read.table.
besides some meta-data there are 1038 variables
2010 Jul 20
1
p-values pvclust maximum distance measure
Hi,
I am new to clustering and was wondering why pvclust using "maximum"
as distance measure nearly always results in p-values above 95%.
I wrote an example programme which demonstrates this effect. I
uploaded a PDF showing the results
Here is the code which produces the PDF file:
-------------------------------------------------------------------------------------
s <-
2010 Aug 10
2
p-values with pvclust
Hi,
if you look at the first image (Image1) you see that there are 2 main
clusters 7 and 8
I wanted to use pvclust to calculate a p-value whether these clusters are
due to chance
or statistically significant. Unfortunately pvclust does not provide a
p-value for the first
brunch (7 and 8).
So I added a row to my matrix which is very different to the rest of the
data to create an additional
2006 Jul 06
0
pvclust Error:NA/NaN/Inf in foreign function call (arg 11)
Hi all,
I'm new to R and I'm struggling to decipher an error message. Briefly, I am trying to use the pvclust package to do hierarchical clustering of some CGH data. The data is from the Progenetix CGH database. It is arranged as a table where each column is a single case and each row is a single chromosome band. The value in each cell is either 0, 1, 2, or -1. Corresponding to no change,
2011 Mar 05
1
pvclust crashing R on Ubuntu 10.10
Hi all
I am writing to you with a question regarding the pvclust package. And
yes, before the usual people produce their usual
contact-the-package-maintainers line, ye, I tried that but the emails
one can find on the web either bounce or are not responded to. Also,
yes, this error has already been reported as a bug but been shot down
as not reproducible
2014 Jul 28
1
Split PVClust plot
Dear All
I'm using PVClust to perform hierarchical clustering, for the output plot I can control most of the graphical I need, however the plot is large and I would like to split it vertically into two panels one above the other. Is there a way to plot only part of a PVClust plot, I tried to convert it to a dendrogram with
result2 = as.dendrogram(result)
however I get the error message
2009 Jul 09
0
Node colors in pvclust
Is there a way to assign color to nodes as with
hclust/as.dendrogram/dendrapply when using pvclust?
The problem is that as.dendrogram isn't working on the pvclust objects.
library(pvclust)
pvc <- pvclust(matrix, nboot=1000)
plot(pvc)
--
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Sent from the R help mailing list archive at
2010 Aug 09
0
Fwd: RE: pvclust function
You should reply to the list, not just me, and even more because I
cannot really help you!!
My guess (but I don't know this package, and even less this function) is
that pvclust() is expecting a matrix as the first argument. However,
"cluster" is no data, it is a function. Why, I don't know. Take a closer
look at ?pvclust, especially the "usage",
2010 Feb 02
2
hvcluster() with distance method from vegdist(), package = vegan
hello,
i'd be happy if someone could provide help with the following problem:
i have a dist.matrix that comes from vegdist() function of the vegan
package. the used method = "horn" is not accepted as argument in
hvcluster(...,dist.method="...").
is there a way to incorporate the method "horn" in hvcluster()?
thanks in advance!
yours,
kay
--
View this
2006 Jul 10
2
pvclust missing values problem
Hello all,
I posted a question to this list last week and received no response. I am unsure if this means no-one knows the answer or if I posed the question badly. I'm going to assume I posed the question badly and try again. I am new to R so it is quite likely it's a very naive question, however if there is something blindingly obvious that I am missing or if there is another resource I
2010 Dec 28
3
Jaccard dissimilarity matrix for PCA
Hi
I have a large dataset, containing a wide range of binary variables.
I would like first of all to compute a jaccard matrix, then do a PCA on this
matrix, so that I finally can do a hierarchical clustering on the principal
components.
My problem is, that I don't know how to compute the jaccard dissimilarity
matrix in R? Which package to use, and so on...
Can anybody help me?
Alternatively
2008 Jun 25
0
pvclust:a general and a specific question
I realize questions about packages should go to the package maintainer,
but perhaps I have an old email address (suzuki3 at is.titech.ac.jp)
Also I have both a general, and a specific, question.
1) General question: i've used pvclust before to assess significance of
clusters and got reasonable results. However, on a new data set (see
below) the results seem odd. I wonder if pvclust is a
2007 Dec 07
1
pvclust warning message
Hi all
I am trying to perform the follwing:
fit<-pvclust(wq, method.hclust="ward", method.dist="euclidean")
but get a strange error message that I just cant figure out.
Has anyone come across this? Any help would be most appricieated
Error in hclust(distance, method = method.hclust) :
NA/NaN/Inf in foreign function call (arg 11)
In addition: Warning message:
NAs
2008 Jun 16
0
pvclust distance matrix
Hello,
I am attempting to assign significance levels to a UPGMA cluster analysis as part my doctoral research. The pvclust function works well but doesn't include the similarity index I need (morisita's) as an option for computing a distance matrix. Morisita's is available in vegdist in the VEGAN library but I am having a hard time getting the vegdist function to "direct
2011 May 17
1
simprof test using jaccard distance
Dear All,
I would like to use the simprof function (clustsig package) but the available distances do not include Jaccard distance, which is the most appropriate for pres/abs community data. Here is the core of the function:
> simprof
function (data, num.expected = 1000, num.simulated = 999, method.cluster = "average",
method.distance = "euclidean", method.transform =
2008 Jul 23
0
pvclust
Hello there,
Here's a question regarding p-values on clusters produced by hierarchical
cluster analysis. A web search led me to the program pvclust to tackle this
problem. But when I run the problem I get strange results. The 'AU'
(approximately unbiased) p-values are very different from the 'BP' values
(ordinary boot-strap) p-values. The AUs commonly are in the 80-100
2007 Jun 08
2
How to do clustering
Dear List,
I have another question to bother you about how to do clustering.
My data consists of 49 columns (49 variables) and 238804 rows.
I would like to do hierarchical clustering (unsupervised clustering
and PCA). So far I tried pvclust (www.is.titech.ac.jp/~shimo/prog/*pvclust*
/)
but I always had the problem like for R like "cannot allocate the memory".
I am curious about what
2009 Mar 25
1
how to calcualte Jaccard Coefficient
Does anyone have a good method for calculating Jaccard coefficients now that the dissimilarity() function is no longer an option?
Wen Gu
John Jay College of Criminal Justice445 West 59 StreetNew York, NY 10029
wgu@gc.cuny.edu
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2010 Aug 09
1
(no subject)
Hi there,
I have been trying to use the "pvclust" package but have been having
some difficulties. This is the first time I have used R so I am sure the
mistake I am making is a basic one. The data I have is a distance matrix
and I have been using the command; fit <- pvclust(cluster, nboot=1000,
method.dist="euclidean") to try and perform hierarchical clustering with