Displaying 8 results from an estimated 8 matches for "tudor_bodea".
2011 Apr 08
4
Rpart decision tree
Dear useRs:
I try to plot an rpart object but cannot get a nice tree structure plot. I
am using plot.rpart and text.rpart (please see below) but the branches that
connect the nodes overlap the text in the ellipses and rectangles. Is there
a way to get a clean nice tree plot (as in the Rpart Mayo report)? I work
under Windows and use R2.11.1 with rpart version 3.1-46.
Thank you.
Tudor
...
2011 Apr 29
0
Plot multiple ctrees in the same figure
Dear all:
Is there a way one could plot two conditional inference trees (party
package, ctree) in a figure specified by layout? My attempts failed as
plot.party seemed to take over the layout functionality and forced a single
ctree plot to be displayed. A brief (non reproducible) example together
with the intended behavior follows below. I hope I am not missing something
obvious. My system:
2012 Oct 30
1
Data set BregFix in package flexmix
Dear list:
I would like to recreate how the artificial data set BregFix was generated
in package flexmix (thanks Bettina and Friedrich). The data set is
thoroughly described in Grun and Leisch's Computational Statistics & Data
Analysis 51(11) :5247-5252 but references to the appropriate seed number(s)
are missing (providing these details was certainly beyond the scope of the
authors'
2010 Jun 12
2
mob (party package) question
Dear useRs:
I try to use mob from the party package (thanks Achim and Co.!) to model
based recursive partition a data set. The model is a logistic regression
specified with model=glinearModel and family=binomial(). Running mob
results in a few warnings of the type: In glm.fit ... algorithm did not
converge. As I speculate that this may be due to an insufficient number of
iterations I am
2012 May 15
2
rpart - predict terminal nodes for new observations
Dear useRs:
Is there a way I could predict the terminal node associated with a new data
entry in an rpart environment? In the example below, if I had a new data
entry with an AM of 5, I would like to link it to the terminal node 2. My
searches led to http://tolstoy.newcastle.edu.au/R/e4/help/08/07/17702.html
but I do not seem to be able to operationalize Professor Ripley's
suggestions.
Many
2012 Oct 01
2
mlogit and model-based recursive partitioning
Hello:
Has anyone tried to model-based recursive partition (using mob from package
party; thanks Achim and colleagues) a data set based on a multinomial logit
model (using mlogit from package mlogit; thanks Yves)?
I attempted to do so, but there are at least two reasons why I could not.
First, in mob I am not quite sure that a model of class StatModel exists for
mlogit models. Second, as
2010 Oct 05
1
party with mob - parameter estimates not significant in terminal nodes
Dear useRs:
I successfully model-based partitioned several datasets through the use of
mob from the party package (thanks Achim et al. once again !!!). At times,
however, the partitioning leads to terminal nodes in which the parameter
estimates of the model are not significant (although the split points and in
general the proposed segmentation both seem reasonable). As I do not seem
to be able
2010 Feb 20
3
LaTeX/R/Sweave Problems
Dear All:
For a few days now I have struggled with recreating a stable LaTeX/R/Sweave
environment on a new Windows XP SP3 machine. Unfortunately it seems that I
ran out of good ideas and I would like your expert opinion on how I should
approach this task and be successful. In essence, I installed (several
times) in this order the following: R2.10.1 (and then R 2.9.2), Adobe
Acrobat Reader 9