Displaying 20 results from an estimated 100 matches similar to: "create picture (k -the nearest neighbours)"
2009 Oct 27
1
"ipredknn" - How may I find values?
Hi everybody!
I want to find a closer neighbourins observation. This is my code:
##########################
library(klaR)
library(ipred)
library(mlbench)
data(PimaIndiansDiabetes2)
dane=na.omit(PimaIndiansDiabetes2)[,c(2,5,9)]
dane[,2]=log(dane[,2])
dane[,1:2]=scale(dane[,1:2])
zbior.uczacy=sample(1:nrow(dane),nrow(dane)/2,F)
2009 Apr 25
1
Overlapping parameters "k" in different functions in "ipred"
Dear List,
I have a question regarding "ipred" package. Under 10-fold cv, for different knn ( = 1,3,...25), I am getting same misclassification errors:
#############################################
library(ipred)
data(iris)
cv.k = 10 ## 10-fold cross-validation
bwpredict.knn <- function(object, newdata) predict.ipredknn(object, newdata, type="class")
for (i in
2009 May 12
1
questions on rpart (tree changes when rearrange the order of covariates?!)
Greetings,
I am using rpart for classification with "class" method. The test data is
the Indian diabetes data from package mlbench.
I fitted a classification tree firstly using the original data, and then
exchanged the order of Body mass and Plasma glucose which are the
strongest/important variables in the growing phase. The second tree is a
little different from the first one. The
2009 May 22
1
bug in rpart?
Greetings,
I checked the Indian diabetes data again and get one tree for the data with
reordered columns and another tree for the original data. I compared these
two trees, the split points for these two trees are exactly the same but the
fitted classes are not the same for some cases. And the misclassification
errors are different too. I know how CART deal with ties --- even we are
using the
2010 May 13
1
What's data() for?
Hi there,
>library(faraway)
>pima
pregnant glucose diastolic triceps insulin bmi diabetes age test
1 6 148 72 35 0 33.6 0.627 50 1
2 1 85 66 29 0 26.6 0.351 31 0
>data(pima)
>pima
pregnant glucose diastolic triceps insulin bmi diabetes age test
1 6 148 72 35 0 33.6
2002 Jan 11
2
I'm stumped
I just installed 302p1 on a client's machine (I run it on all of
mine) and something is definetly wrong, can't figure out what.
ssh localhost
ssh_exchange_identification: Connection closed by remote host
stock config files except
ssh allows X11 forwarding
any suggestions?
Michael at Insulin-Pumpers.org
2005 Jul 05
1
Getting runtime error in stepclass
Hi!
I got the following runtime error when I tried to use svm method with
stepclass.
Error in "colnames<-"(`*tmp*`, value = c("0", "1")) :
attempt to set colnames on object with less than two dimensions
I repeated the same sequence of statements but this time I used the
classification function used in the example, i.e., "lda" and it worked
fine
2010 Oct 13
5
Poisson Regression
Hello everyone,
I wanted to ask if there is an R-package to fit the following Poisson
regression model
log(\lambda_{ijk}) = \phi_{i} + \alpha_{j} + \beta_{k}
i=1,\cdots,N (subjects)
j=0,1 (two levels)
k=0,1 (two levels)
treating the \phi_{i} as nuinsance parameters.
Thank you very much
--
-Tony
[[alternative HTML version deleted]]
2009 Dec 17
2
some help regarding combining columns from different files
Dear all,
Here is my code which am using to combine 5th column from different data
sets.
Here is the function to do my job
genesymbol.append.file <-NULL
gene.column <- NULL
readGeneSymbol <- function(files,genesymbol.column=5){
for(i in fnames){
temp <- read.table(fnames,header=T,sep="\t",stringsAsFactors=F,quote="\"")
2004 Sep 22
3
My testimonial about skuper viakgra
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2001 Nov 14
6
[PATCH]: Patch to fix hang on exit bug under Linux and add optional exit delay
The hang-on-exit bug still hasn't been fixed in OpenSSH-3.0p1... :-(
Here again is the patch to fix this bug under Linux, updated for OpenSSH-3.0p1.
This has been exhaustively tested for six months now. It also add an exit
delay option that can be useful.
The patch does not lead to data loss under Linux.
Please see the Secure NFS page (SNFS) for further details:
2001 Dec 10
10
hang on exit bug under Linux
>From what I understand, the problem is due to people's disagreement about what the "correct" behavior should be. I'm pretty sure that the following is the correct behavior from running rsh and ssh often (both fsecure and openssh).
Lets say you have a stupid script that does
while 1
do
sleep 1
done
Called foreverSleep on your remote host:
rsh remotehost
2012 Mar 24
0
NLME error model with several responses
Hi!
I am using the NLME package for R to modeling glucose-insuline
response with Bergman's model, very similar to the example in the
documentation for the NLME package.
My question concerns the model for the residuals. I use a proportional
model , Var(e_{ij})=(sigma_g*G(t))^2 for the glucose response and
Var(e_{ij})=(sigma_i * I(t))^2 for the insulin response. Hence I have
a varPower model,
2015 Feb 05
0
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2009 Mar 15
0
Axes crossing at origin
Hi,
I'm having a bit of trouble with the axes in my plots. I don't like the way
R does not have them cross in the origin. Is there another plot/axis
function? i tried using abline as suggested by someone from this list, but
in my case this gives no satisfactory result, as the abline does sometimes
lie on top of the y axis and sometimes not, depending on how i scale the
image...
#bild16
2004 Feb 25
0
k nearest neighbours between two matrix
I have two dataframes A and B consisting of latitude longitude coordinates
of points. For each point in A I want to find the k-nearest neighbours in B.
Currently, I calculate the distance from each point in A to all the points
in B (using rdist.earth() in fields package), sort the points of B by
distance and select the k nearest ones.
Is there a more efficient way to do this?
Function knearneigh
2004 Jun 22
1
k nearest neighbours
Hi there fellow R-users,
Does anyone know of a function which does exactly what knearneigh{spdep}
(finds the k nearest neighbours) does in the package spdep but for more than
2D data?
Regards
Wayne
KSS Ltd
Seventh Floor St James's Buildings 79 Oxford Street Manchester M1 6SS England
Company Registration Number 2800886
Tel: +44 (0) 161 228 0040 Fax: +44 (0) 161 236 6305
2009 Oct 30
1
Applying a function on n nearest neighbours
I'm having a problem where I have to apply a function to a subset of a
variable, where the subset is defined by the n nearest neighbours of a
second variable.
Here's an example applied to the 'iris' dataset:
$ head(iris)
Sepal.Length Sepal.Width Petal.Length Petal.Width Species
1 5.1 3.5 1.4 0.2 setosa
2 4.9 3.0 1.4
2011 Apr 19
1
SPDEP Package, neighbours list for Moran's I on large grid dataset
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Nom : non disponible
URL : <https://stat.ethz.ch/pipermail/r-help/attachments/20110419/a3438017/attachment.pl>
2012 Jun 20
1
nearest neighbours and their ID
Dear R users,
I used nndist() to gain the distance of 2 nearest
neighbours of the points in my dataset. Is there a way of getting the ID numbers
of these nearest neighbours (along with their distances).
The command I used: nn2 <- nndist(X2, k=1:2). This is the output of the nearest neighbour distances I got (the IDs of the given points are there but their IDs aren't). Any help or