Re: [R] "ipredknn" - How may I find values?

David Winsemius Tue, 27 Oct 2009 16:45:34 -0700


On Oct 27, 2009, at 10:18 AM, Grzes wrote:

Yes, I want to know which points in my picture are in red or greenarea.

For example:
.............glucose..........insulin.....diabetes
609  0.95177272  1.13996901        1   - I want to know that it's for
example: black point in red area


red area?

253 -1.05724970 -1.15881433 1 - it's for example: blackpoint in
green area


green area?

319 -0.24716002  0.18483054        1
302  0.69254402  0.13252965        2
If it's impossible plese give me any package or function which cando it.

I already asked what was different about your code that was able to doplotting without error on your machine.


--
David



Max Kuhn wrote:


I think we are having some difficulty understanding what you are
looking for. If you are looking to find which of the training samples
were closest to the prediction sample, I don't think that you can get
it from this function.

If this is what you want, I use the dist function in the proxypackage.

Max

On Tue, Oct 27, 2009 at 8:46 AM, David Winsemius <dwinsem...@comcast.net>

wrote:


On Oct 27, 2009, at 6:02 AM, Grzes wrote:


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)

klasyfikatorKNN=ipredknn(diabetes~glucose+insulin,data=dane,subset=zbior.uczacy,k=3)


oceny=predict(klasyfikatorKNN,dane[-zbior.uczacy,],"class")

#data frames with my result from klasyfikatorKNN

df=data.frame(glucose=c(klasyfikatorKNN$learn$X[,1]),insulin=klasyfikatorKNN$learn$X[,2],diabetes=c(klasyfikatorKNN$learn$y))

#And picture
drawparti(as.factor(df$diabetes), df$glucose, df$insulin, method =
"sknn",
prec = 100, xlab = NULL, ylab = NULL)


I get an error: Error: could not find function "drawparti"

##########################
My question is: How or where may I find correct or wrong valueswhich
were
drawn (found,classification) in this picture?


No picture resulted.

It means I'm looking for  x, y
values.

Not sure exactly what you are asking. Does this modification to dfand

fairly obvious the cross table help?

df=data.frame(glucose=c(klasyfikatorKNN$learn$X[,1]),insulin=klasyfikatorKNN$learn$X[,2],pred.diabetes=klasyfikatorKNN$learn$y,
trueDiab=dane[,3])

Warning message:
In data.frame(glucose = c(klasyfikatorKNN$learn$X[, 1]), insulin =
klasyfikatorKNN$learn$X[,  :
 row names were found from a short variable and have been discarded

with( df, table(pred.diabetes, trueDiab))

            trueDiab
pred.diabetes neg pos
         neg 174  86
         pos  88  44



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David Winsemius, MD
Heritage Laboratories
West Hartford, CT

______________________________________________
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--

Max

______________________________________________
R-help@r-project.org mailing list
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PLEASE do read the posting guide
http://www.R-project.org/posting-guide.html
and provide commented, minimal, self-contained, reproducible code.


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View this message in context: 
http://www.nabble.com/%22ipredknn%22---How-may-I-find-values--tp26074994p26078505.html
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______________________________________________
R-help@r-project.org mailing list
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PLEASE do read the posting guide http://www.R-project.org/posting-guide.html
and provide commented, minimal, self-contained, reproducible code.


David Winsemius, MD
Heritage Laboratories
West Hartford, CT

______________________________________________
R-help@r-project.org mailing list
https://stat.ethz.ch/mailman/listinfo/r-help
PLEASE do read the posting guide http://www.R-project.org/posting-guide.html
and provide commented, minimal, self-contained, reproducible code.

Re: [R] "ipredknn" - How may I find values?

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