Displaying 20 results from an estimated 3000 matches similar to: "Does something like partition.rpart() exist?"
2004 Sep 01
3
How to personalize the rpart function: t.default(x)
I'm trying to personalize the rpart function by introducing a
list('init','split','eval') in the argument method. But I receive an error
message:"Error in t.default(x): argument is not a matrix".
Can anyone tell me what the argument of this function is or where this
function appears in the rpart function.Thanks Simone Vantini
2004 Jul 05
1
how to personalize split function in rpart
Hallo!
I am a student of the Politecnico di Milano (Milan, italy) and I'm working
on CARTs. I'm trying to use the R rpart function with a personalized splitfunction... but I'm not able to do it!
More precisely, I would like to know what is the meaning of the function
'init', 'split' and 'eval' named in the help page.I can't find any answer
in
2002 Apr 11
3
new acf package
I'm a PhD student and I'm working with covariance function. I'm interested
to know if exist some packages in R to calculate and plot the
bidimensional Autocovariance Function. the input matrix is a matrix that
describe a spatial location over a 2-D space and I want to use it in the
same way I can use a time serie in the 1-D acf.
Thanks,
Nicola.
2002 Apr 11
3
new acf package
I'm a PhD student and I'm working with covariance function. I'm interested
to know if exist some packages in R to calculate and plot the
bidimensional Autocovariance Function. the input matrix is a matrix that
describe a spatial location over a 2-D space and I want to use it in the
same way I can use a time serie in the 1-D acf.
Thanks,
Nicola.
2007 May 16
0
effective df in local polinomial regression
Hallo R-users,
I would like to know if there is a way to get the effective degrees
of freedom in
local polinomial regression. At the moment, to carry out the local
polinomial regression, I am using the function
locpoly() in library KernSmooth (I need to estimate both the regression
function and its derivatives, up to the 3rd one).
Thanks,
Simone
--
Simone Vantini
MOX - Modeling and
2008 Jul 16
1
help with bivariate density plot question
Hi Spencer,
I have seen your name on the web site, and perhaps you can
help me with my R problem.
I'm trying to use KernSur to put in evidence a substructure in a
bidimensional plot. My problem is that, in order to get the density
in the low density areas (in which the substructure is located) I should
use different bandwidths. How I can do that?
Also, I think that the best choice for my
2009 May 21
1
em algorithm mixture of multivariate normals
Hi,
I would like to know if it is possible to have a "R code" to estimate the
parameters of a mixture of bivariate (or multivariate) normals via EM
Algorithm. I tried to write it, but in the estimation of the matrix of
variance and covariance, i have some problems. I generate two bidimensional
vectors both from different distribution with their own vector means and
variance and
2003 Jul 17
1
Rpart question - labeling nodes with something not in x$frame
I have a tree created with
tr.hh.logcas <- rpart(log(YCASSX + 1)~AGE+DRUGUSEY+SEX+OBSXNUM +WINDLE,
xval = 10)
I would like to label the nodes with YCASSX rather than log(YCASSX +
1). But the help file for text in library rpart says that you can only
use labels that are part of x$frame, which YCASSX is not.
Is there a way to do what I want?
Thanks in advance
Peter
Peter L. Flom, PhD
2012 Jun 19
1
3-D plot of a bidimensional lognormal distribution
Hi and thanks in advance to everyone who will be able to help me.
I have 2 independent lognormal distributions with different means and sd. I
want to plot them togheter in a 3D plot.
How can i do this??? I'm getting crazy...
Thanks
Ale
--
View this message in context: http://r.789695.n4.nabble.com/3-D-plot-of-a-bidimensional-lognormal-distribution-tp4633866.html
Sent from the R help
2002 Aug 13
2
Misalignment of <NA> in rownames (PR#1905)
An NA in the rownames of a matrix (or dataframe) causes misalignment when the
matrix is printed:
R> x <- matrix(1:12, 3,4, dimnames=list(letters[1:3], LETTERS[1:4]))
R> rownames(x)[2] <- NA
R> x
A B C D
a 1 4 7 10
<NA> 2 5 8 11
c 3 6 9 12
The bug is in function Rstrlen, in src/main/printutils.c. MatrixRowLabel and
MatrixColumnLabel (same file) rely on Rstrlen
2003 Feb 20
2
subset with NA
Easy question that I can't find an answer for. I'm trying to subset a
data frame and want to exclude the positive values, i.e. I want the NA
values.
My data:
> summary(temp$tuna)
Min. 1st Qu. Median Mean 3rd Qu. Max. NA's
1 2 3 3 4 5 1211
Querying for
subset(temp, tuna %in% "NA", select....
subset(temp, tuna == NA,
2004 Nov 11
0
ROracle SQL length limitation
Hi All,
This question was brought up some time ago but I never saw a reply so I'd like to bring it up again. When using ROracle package (version 0.5-5), I am unable to run any queries that are greater than 4000 characters in length. If I do, I get the following message:
Error in oraPrepareStatement(con, statement, bind=NULL) :
RS-DBI driver: (too long a statement -- it must has less than
2008 Jul 22
2
rpart$where and predict.rpart
Hello there. I have fitted a rpart model.
> rpartModel <- rpart(y~., data=data.frame(y=y,x=x),method="class", ....)
and can use rpart$where to find out the terminal nodes that each
observations belongs.
Now, I have a set of new data and used predict.rpart which seems to give
only the predicted value with no information similar to rpart$where.
May I know how
2001 Apr 16
1
Help with plotting error bars in R
Hi,
I'm sorry to send email to everyone on this list, but I have a simple question
which is bothering me and I can't seem to figure out the correct answer. I
just downloaded R and I'm trying to reproduce some simple analysis I've done
on other packages. In particular, if I have a vector of experimental values
and a vector of their uncertainties, is there a way to plot the
2009 Jun 09
3
rpart - the xval argument in rpart.control and in xpred.rpart
Dear R users,
I'm working with the rpart package and want to evaluate the performance of
user defined split functions.
I have some problems in understanding the meaning of the xval argument in
the two functions rpart.control and xpred.rpart. In the former it is defined
as the number of cross-validations while in the latter it is defined as the
number of cross-validation groups. If I am
2001 Nov 29
2
plotting (a) confidence intervals (b) standard error
Hi all,
I'm building a plot of the values in tmeant (below) against positions 1 to
5, using matplot.
tmeant looks like this:
case1 case2
pos1 861.8466 818.5909
pos2 961.2841 976.3466
pos3 878.6080 1262.8523
pos4 950.8011 1129.6080
pos5 968.1080 1063.3920
I also have lower (object tl) and upper (object tu) bounds on the
confidence intervals as follows:
tl:
pos1
2004 Mar 19
3
Incomplete Gamma Functions and GammaDistribution Doc errata.
Hello all,
In the course of trying to implement the CDF of an
InverseGammaDistribution, I have run across the need for an igamma()
function. Several others have needed this function but the answers I
have found so far are not totally clear to me. I'm writing for three
reasons:
1) to present a small error in the docs
2) to clarify the approach we are expected to take
3) to request,for the
2002 Oct 22
1
axis
I am using R 1.6.0 on Windows 2000 Professional. I am trying to rotate
x-axis
labels using "srt = 45, adj = 1", but nothing is happening. It is like the
axis
command is ignoring the "srt" and "adj" arguments.
Thanks,
Mike Lane
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r-help mailing list -- Read
2002 Nov 15
1
Plotting in the margin
Hi,
I would like to place a line (tilted at an angle) in the margin of an R
plot. Is there any way to place such an annotation outside the plotting
area?
As an alternative, being able to plot a rotated character (the pipe, |) in
the margin would be sufficient. The problem is that mtext doesn't work
with the srt option.
As a further alternative, if I could put a legend in the margin, I
2004 May 13
2
R 1.9.0 and pred.rpart
I have just upgraded from R 1.7.3 to R 1.9.0 and have found that the
predict function no longer works for rpart:
> predict(hmmm,sim3[1:10,])
Error in predict.rpart(hmmm, sim3[1:10, ]) :
couldn't find function "pred.rpart"
I have re-installed the rpart package to no avail. Any ideas?
Giles Hooker