Dear helpers
I'm having a problem with function HoltWinters from package ts. I have a time series
that I want to fit an Holt-Winters model and make predictions for the next values.
I've already built an object of class ts to serve as input to HoltWinters. But then I
get an error; I've used
Dear helpers
I want to use rpart several times in a loop to build a classification tree. My problem
is that rpart needs a formula as argument and for that the variables need to have
names and this doesn't happen in my case. Every iteration in the loop has a different
dataset with several
[mailto:[EMAIL PROTECTED]
Sent: Tue 22/07/2003 14:57
To: Luis Miguel Almeida da Silva
Cc: [EMAIL PROTECTED]
Subject: Re: [R] variable names
On Tue, 22 Jul 2003, Luis Miguel Almeida da Silva wrote:
Dear helpers
Hello
Does R have any function that calculates from a data matrix with several classes the
between and within dispersion matrices S_b and S_w
Thanks
Luis
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Dear helpers
I'm sorry to insist but I still think there is something wrong with the function
kmeans. For instance, let's try the same small example:
dados-matrix(c(-1,0,2,2.5,7,9,0,3,0,6,1,4),6,2)
I will choose observations 3 and 4 for initial centers and just one iteration. The
results
Dear helpers
I was working with kmeans from package mva and found some strange situations. When I
run several times the kmeans algorithm with the same dataset I get the same partition.
I simulated a little example with 6 observations and run kmeans giving the centers and
making just one
