Displaying 20 results from an estimated 1200 matches similar to: "SOM (Self-organizing map)"
2003 Oct 15
2
SOM library for R
Hi.
Three years ago, I've read the question of availability of SOM library for
R using Kohonen's SOM_PAK in this mailing-list. This answer was no
availability. And no package dealing with SOM in CRAN.
Is this situation same?
Could you tell me availability this library?
Best Regards.
2010 Mar 30
1
predict.kohonen for SOM returns NA?
All,
The kohonen predict function is returning NA for SOM predictions
regardless of data used... even the package example for a SOM using
wine data is returning NA's
Does anyone have a working example SOM. Also, what is the purpose of
trainY, what would be the dependent data for an unsupervised SOM?
As may be apparent to you by my questions, I am very new to kohonen
maps and am very grateful
2013 Apr 15
1
Imputation with SOM using kohonen package
I have a data set with 10 variables, and about 8000 instances (or
objects/rows/samples). In addition I have one more ('class') variable that
I have about 10 instances for, but for which I wish to impute values for.
I am a little confused how to go about doing this, mostly as I'm not
well-versed in it. Do I train the SOM with a data object that contains just
the first 10 variables
2006 Apr 01
1
reference paper about SOM
Hi All,
I'm looking for some reference paper about SOM (self organizing map)
algorithm. I tried the paper which is mentioned in
the help page of function "som (package:som)":
http://www.cis.hut.fi/research/papers/som_tr96.ps.Z
But I can't open it for some reason. Could you please help me with it ?
Thanks a lot!
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2010 Jun 02
1
how to label the som notes by the majority vote
HI, Dear R community,
I am using the following codes to do the som. I tried to label the notes by
the majority vote. either through mapping or prediction.
I attached my output, the left one dont have any labels in the note, the
right one has more than one label in each note. I need to have only one
label for each note either by majority vote or prediction.
Can anyone give some suggestions or
2009 Nov 28
1
Kohonen Package
Hi All,
I am still learning R, but making, IMO, great strides. I learned about Kohonen/Self-Organizing Maps in class and I would like to try to replicate some of the things we have seen in class.
Below is my code. I am trying to create a u-matrix. In the documentation on page 9 it appears the type of plot, dist.neighbours should do the trick, however, I am getting an error:
(Error in
2009 Jun 01
0
kohonen SOM
Hi All,
I am experimenting with using binary data (1, 0) in the kohonen package. I would like either 1 or 0 to be mapped in SOM, but the package gives me 1 or 0 (as expected), but something in between.
I am not scaling the binary data, but still there are in-between values.
Can anybody suggest a way to keep the data binary, even in the SOM plot?
Thanks a lot.
George
2003 Apr 16
1
Question on SOM and clustering
Hello everyone,
I'm new to this list, so let me introduce myself: my name is Jonck van
der Kogel and I am a graduate student at the Erasmus University of
Rotterdam. I am currently working on my thesis which is on the use of
artificial intelligence for large data-sets.
To do an analysis of a certain data-set I want to use Kohonen's SOM
algorithm. However, as I understand it, the SOM
2013 Jul 24
1
Help to improve prediction from supervised mapping using kohonen package
I would really like some or any advice on how I can improve (or fix??)
the following analysis. I hope I have provided a completely runnable
code - it doesn't produce any errors for me.
The resulting plot at the end shows a pretty poor correlation (just
speaking visually here) to the test set. How can I improve the
performance of the mapping and prediction?
Here are some of the data
2011 Feb 25
1
kohonen: "Argument data should be numeric"
Hi,
I'm trying to utilize the kohonen package to build SOM's. However,
trying this on my data I get the error:
"Argument data should be numeric"
when running the som(data.train, grid = somgrid(6, 6, "hexagonal"))
function. As you see, there is a problem with the data type of
data.train which is a list. When I try to convert it to "numeric" I
get the error:
2001 Mar 01
1
Kohonen's SOM in R?
Is there an implementation of the SOM ('Self Organizing Map') procedure in
R ?
I am aware of the implementations of Sammon mapping, multidimensional
scaling and, somewhat peripherally, principal curves and projection
pursuit .. but not SOM per se as far as I can see. Am I missing
something?
---------------------
for anyone interesed in SOM
I found Samuel Kaski's thesis
2009 May 21
4
"help"
Hola,
alguien me puede decir cómo descargar la librería
"kohonen", pues lo he intentado con download.packages y no hay forma. No sé
si es porque pongo mal el directorio de destino o porque esa librería esta
dentro de otra y no la localizo. Ya he usado en otras ocasiones el comando
download.packages y no me había dado problemas
gracias
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2007 Jan 24
2
how to trace what crashes R
I am writing bindings to the C library (neural network simulator SNNS).
DLL was produced with the command
R CMD SHLIB [source with C-wrappers, callable from R with .C and all
sources from the snns kernel]
I used latest MinGW.
The problem is. R crashes with the "segmentation violation".
Tracing with the insight and with simple Rprintf's gave me that crash occurs
on the call of the
2016 Jun 03
2
PBQP register allocation and copy propagation
Hi,
> > I think one idea to improve the situation is to consider the cost
vector of adjacent nodes during RN. Let's say you decided to do a RN for
node A and want to compute the costs for choosing register %Ri. The current
implementation does this by computing min(row/column i of edge A <--> B)
but you can do better by adding B's cost vector to the row/column before
computing
2016 Jun 04
2
PBQP register allocation and copy propagation
> (1) Spill cost metrics.
I think this one cannot be dissociated from some kind of live range pre-splitting.
Cheers,
Arnaud
From: Lang Hames [mailto:lhames at gmail.com]
Sent: 03 June 2016 23:15
To: James Molloy
Cc: Arnaud De Grandmaison; llvm-dev at lists.llvm.org; Sebastian Buchwald; Bernhard Scholz
Subject: Re: [llvm-dev] PBQP register allocation and copy propagation
Hi James, Arnaud,
1997 Apr 08
2
R-alpha: CRAN source/contrib
I've put all ``current'' add-on packages into CRAN's source/contrib tree
and created an INDEX file (attached below). As you can see, currently
we have
acepack
bootstrap
ctest
date
e1071
fracdiff
gee
jpn
snns
splines
survival4
(Yes, e1071 and jpn are new ... more on the latter in a later mail.)
In the near future, I am hoping for the following:
oz (Bill
2007 Jun 06
3
Neural Net. in R
Hi everyone,
I'm a graduate student of engineering, lately introduced with R. and using R
for my project and thesis. I'm trying to use R for implementing a neural
network regression model and apply it to my database. I found three R
packages ("AMORE" , "grnnR" , "neural") in R website, but their manuals are
not really user-friendly in my idea. I was wondering
2009 Nov 18
3
SOM library - where do I find it
R version 2.9.2 (2009-08-24) - for windows
> library(SOM)
Error in library(SOM) : there is no package called 'SOM'
Where can I get the SOM library from?
Thanks in advance
--
View this message in context: http://old.nabble.com/SOM-library---where-do-I-find-it-tp26415633p26415633.html
Sent from the R help mailing list archive at Nabble.com.
2005 Oct 24
0
SOM object manupulation
I am trying to use SOM package to cluster some gene expression data. I got
stuck with 2 questions and can't not find any documents to resolve these
matters. I would really appreciate if anybody can shed some sort of light. Q1.
I clustered the data using SOM function and plotted it using plot function.
But I can't figure out how I can list the data elements belongs to different
clusters. I
2009 May 29
1
Backpropagation to adjust weights in a neural net when receiving new training examples
I want to create a neural network, and then everytime it receives new data,
instead of creating a new nnet, i want to use a backpropagation algorithm
to adjust the weights in the already created nn.
I'm using nnet package, I know that nn$wts gives the weights, but I cant
find out which weights belong to which conections so I could implement the
backpropagation algorithm myself.
But if anyone