Displaying 20 results from an estimated 10000 matches similar to: "R-Package for Recursive Partitioning without Classification or Regression"
2017 Aug 01
0
R-Package for Recursive Partitioning without Classification or Regression
Hello Tom,
what you describe seems like using hierarchical clustering and
plotting a dendrogram to me, even though only in the "visual" way, not
in the math behind the algorithms.
Are you looking for something like this?
https://rpubs.com/gaston/dendrograms
Just please note, that this is very far from rpart in term of how the
algorithms work (already mentioned by Bert Gunter)
Best,
2008 Sep 02
2
cluster a distance(analogue)-object using agnes(cluster)
I try to perform a clustering using an existing dissimilarity matrix that I
calculated using distance (analogue)
I tried two different things. One of them worked and one not and I don`t
understand why.
Here the code:
not working example
library(cluster)
library(analogue)
iris2<-as.data.frame(iris)
str(iris2)
'data.frame': 150 obs. of 5 variables:
$ Sepal.Length: num 5.1 4.9 4.7
2006 May 31
2
a problem 'cor' function
Hi list,
One of my co-workers found this problem with 'cor' in his code and I confirm it too (see below). He's using R 2.2.1 under Win 2K and I'm using R 2.3.0 under Win XP.
===========================================
> R.Version()
$platform
[1] "i386-pc-mingw32"
$arch
[1] "i386"
$os
[1] "mingw32"
$system
[1] "i386, mingw32"
$status
2008 Oct 13
2
split data, but ensure each level of the factor is represented
Hello,
I'll use part of the iris dataset for an example of what I want to
do.
> data(iris)
> iris<-iris[1:10,1:4]
> iris
Sepal.Length Sepal.Width Petal.Length Petal.Width
1 5.1 3.5 1.4 0.2
2 4.9 3.0 1.4 0.2
3 4.7 3.2 1.3 0.2
4 4.6 3.1 1.5
2008 Feb 27
2
multiple plots per page using hist and pdf
Hello,
I am puzzled by the behavior of hist() when generating multiple plots
per page on the pdf device. In the following example two pdf files
are generated. The first results in 4 plots on one pdf page as
expected. However, the second, which swaps one of the plot() calls
for hist(), results in a 4 page pdf with one plot per page.
How might I get the histogram with 3 other scatter
2011 Jul 28
2
not working yet: Re: lattice overlay
Hi Dieter and R community:
I tried both of these three versions with ylim as suggested, none work: I
am getting only single (pch = 16) not overlayed (pch =3) everytime.
*vs 1*
require(lattice)
xyplot(Sepal.Length ~ Sepal.Width | Species , data= iris,
panel= function(x, y, subscripts) {
panel.xyplot(x, y, pch=16, col = "green4", ylim = c(0, 10))
panel.lmline(x, y, lty=4, col =
2010 Jun 09
4
question about "mean"
Hi there:
I have a question about generating mean value of a data.frame. Take
iris data for example, if I have a data.frame looking like the following:
---------------------
Sepal.Length Sepal.Width Petal.Length Petal.Width Species
1 5.1 3.5 1.4
0.2 setosa
2 4.9 3.0 1.4
0.2
2012 Jul 10
3
fill 0-row data.frame with 1 line of NAs
Dear all
Is there a simpler method to achieve the following: When I obtain an
empty data.frame after subsetting, I need for it to contain one line
of NAs. Here's a dummy example:
> (.xb <- iris[ iris$Species=='zz', ])
[1] Sepal.Length Sepal.Width Petal.Length Petal.Width Species
<0 rows> (or 0-length row.names)
> dim(.xb)
[1] 0 5
> (.xa <-
2017 Sep 15
3
Regarding Principal Component Analysis result Interpretation
Dear Sir/Madam,
I am trying to do PCA analysis with "iris" dataset and trying to interpret
the result. Dataset contains 150 obs of 5 variables
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
0.2 setosa
2007 Mar 22
2
unexpected behavior of trellis calls inside a user-defined function
I am making a battery of levelplots and wireframes for several fitted
models. I wrote a function that takes the fitted model object as the
sole argument and produces these plots. Various strange behavior
ensued, but I have identified one very concrete issue (illustrated
below): when my figure-drawing function includes the addition of
points/lines to trellis plots, some of the
2005 Sep 16
6
How do I get the row indices?
Hi,
I was wondering if it's possible to get the row
numbers from a filtering. Here's an example:
# give me the rows with sepal.length == 6.2
iris[(iris[,1]==6.2),]
# output
Sepal.Length Sepal.Width Petal.Length Petal.Width
Species
69 6.2 2.2 4.5 1.5
versicolor
98 6.2 2.9 4.3 1.3
versicolor
127 6.2
2009 Oct 17
1
Easy way to `iris[,-"Petal.Length"]' subsetting?
Dear all
What is the easy way to drop a variable by using its name (and not its
number)? Example:
> data(iris)
> 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 0.2 setosa
3 4.7 3.2 1.3 0.2 setosa
4 4.6 3.1
2006 Dec 18
5
Replacing values
Hi all,
I have to recode some values in a dataset. for example changing all zeros to
"." or 999 would be also ok. does anybody know how to do this? thanks in
advance. lars
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2006 Dec 14
5
Nicely formatted tables
If I use latex(summary(X)) where X is a data frame with four
variables I get something like
Rainfall Education Popden Nonwhite
Min. :10.00 Min. : 9.00 Min. :1441 Min. : 0.80
1st Qu.:32.75 1st Qu.:10.40 1st Qu.:3104 1st Qu.: 4.95
Median :38.00 Median :11.05 Median :3567 Median :10.40
Mean :37.37 Mean :10.97 Mean :3866
2012 Jul 23
1
duplicated() variation that goes both ways to capture all duplicates
Dear all
The trouble with the current duplicated() function in is that it can
report duplicates while searching fromFirst _or_ fromLast, but not
both ways. Often users will want to identify and extract all the
copies of the item that has duplicates, not only the duplicates
themselves.
To take the example from the man page:
> data(iris)
> iris[duplicated(iris), ] ##duplicates while
2008 Aug 07
6
multiple tapply
Hi folk,
I tried this and it works just perfectly
tapply(iris[,1],iris[5],mean)
but, how to obtain a single table from multiple variables?
In tapply x is an atomic object so this code doesn't work
tapply(iris[,1:4],iris[5],mean)
Thanx and great summer holidays
Gianandrea
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2011 Aug 16
3
Newbie question - struggling with boxplots
Hopefully I will not be flamed for this on the list, but I am starting out
with R and having some trouble with combining plots.
I am playing with the famous iris dataset (checking out example dataset in R
while reading through Introduction to datamining)
What I would like to do is create three graphs (combined boxplots) besides
each other for each of the three species (Setosa, Versicolour and
2004 Aug 21
2
more on apply on data frame
Hi R People:
Several of you pointed out that using "tapply" on a data frame will work on
the iris data frame.
I'm still having a problem.
The iris data frame has 150 rows, 5 variables. The first 4 are numeric,
while the last is a factor, which has the Species names.
I can use tapply for 1 variable at a time:
>tapply(iris[,1],iris[,5],mean)
setosa versicolor virginica
2009 Dec 19
3
DROP and KEEP statements in R
What is equivalent to DROP or KEEP statements of SAS in R?
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2003 Sep 09
2
lattice.xyplot: adding grid lines
Hallo,
I'd like to add grid lines to a lattice graph having 2 series of Y data.
See these 2 examples:
data(iris)
[1]
xyplot(Sepal.Length + Sepal.Width ~ Petal.Length ,
data = iris, allow.multiple = TRUE, scales = "same",type="l",
)
[2]
xyplot(Sepal.Length + Sepal.Width ~ Petal.Length ,
data = iris, allow.multiple = TRUE, scales =