Displaying 20 results from an estimated 500 matches similar to: "Different goodness of fit tests leads to contradictory conclusions"
2010 Jul 09
1
Appropriate tests for logistic regression with a continuous predictor variable and Bernoulli response variable
I have a data with binary response variable, repcnd (pregnant or not) and one predictor continuous variable, svl (body size) as shown below. I did Hosmer-Lemeshow test as a goodness of fit (as suggested by a kind “R-helper” previously). To test whether the predictor (svl, or body size) has significant effect on predicting whether or not a female snake is pregnant, I used the differences between
2011 May 08
1
Hosmer-Lemeshow 'goodness of fit'
I'm trying to do a Hosmer-Lemeshow 'goodness of fit' test on my logistic
regression model.
I found some code here:
http://sas-and-r.blogspot.com/2010/09/example-87-hosmer-and-lemeshow-goodness.html
The R code is above is a little complicated for me but I'm having trouble
with my answer:
Hosmer-Lemeshow: p=0.6163585
le Cessie and Houwelingen test (Design library): p=0.2843620
2008 Sep 16
2
Hosmer- Lemeshow test
Dear R - help,
I am working on the Credit scorecard model. I am using the Logistic regression to arrive at the regression coefficients model.
I want to use the Hosmer - Lemeshow test .
In order to understand the use of R - language, I had referred the following URL
http://www.stat.sc.edu/~hitchcock/diseaseoutbreakRexample704.txt
The related data 'diseaseoutbreak' is available
2008 Nov 07
1
two kind of Hosmer and Lemeshow’s test
I know that there are two method to apply the Hosmer and Lemeshow?s. One of
them is calculated based on the fixed and pre-determined cut-off points of
the estimated probability of success. One of them is calculated based on
the percentiles of estimated probabilities.
In the previous post,i find that the Hosmer and Lemeshow?s test how to use
in R.
hosmerlem <-
function (y, yhat, g = 10)
{
2013 Apr 23
1
Hosmer Lemeshow test
Hi to everybody. I use the following routine (i found it in the internet)
to compute the Hosmer-Lemeshow test in the framework of logistic regression.
hosmerlemeshow = function(obj, g=10) {
# first, check to see if we fed in the right kind of object
stopifnot(family(obj)$family=="binomial" && family(obj)$link=="logit")
y = obj$model[[1]]
# the double bracket
2013 Apr 14
5
Logistic regression
I have a data set to be analyzed using to binary logistic regression. The
data set is iin grouped form. My question is: how I can compute
Hosmer-Lemeshow test and measures like sensitivity and specificity? Any
suggestion will be greatly appreciated.
Thank you
Endy
[[alternative HTML version deleted]]
2002 Oct 21
2
More Logistic Regression Tools?
I've been using R to do logistic regresssion, and that's working
well, but there are two things I haven't figured out how to do.
(1) Is there some pre-existing function that will let you compute the
odds ratios and confidence intervals for them for a specific fit. I know
how to do this manually or even write a function that I can call with
the coefficients and se, but
2010 Jul 15
0
Histogram with two groups on the same graph (not on separate panels)
I have been trying to produce a histogram that has two groups (male and female
snakes) on the same graph (either superimposed or each frequency bar appears
side by side). I found a couple of functions for superimposed histogram written
by other people.
The below is the codes I used for my data containing a column of svl (body size;
snout-vent length) and another column of sex (male or female).
2008 Sep 25
1
HOW to use the Hosmer–Lemeshow test? in R
i want to know how to use the Hosmer?Lemeshow test? in R. Can anyone show me
the program to me and tell me how to use it?
--
View this message in context: http://www.nabble.com/HOW-to-use-the-Hosmer%E2%80%93Lemeshow-test%E2%80%8F-in-R-tp19675283p19675283.html
Sent from the R help mailing list archive at Nabble.com.
2003 Jul 17
1
Hosmer- Lemeshow test
dear all,
i made some analysis with logistic regression. do you know if there is
already a function available for the hosmer-lemeshow fitness test?
thank you very much for the help
best wishes
andi
2006 Apr 06
0
More Logistic Regression Tools?
Frank E Harrell Jr wrote:
> Eric Rescorla <ekr at rtfm.com> wrote:
>
>> (2) I'd like to compute goodness-of-fit statistics for my fit
>> (Hosmer-Lemeshow, Pearson, etc.). I didn't see a package that
>> did this. Have I missed one?
>
> Hosmer-Lemeshow has low power and relies on arbitrary binning of
> predicted probabilities. The Hosmer-Le Cessie
2002 Nov 22
2
hosmer-lemeshow
Hi eveybody.
I've seen posted before the same question, but no answer. Is there anybody
who has implemented the Hosmer-Lemeshow test in R?
TIA,
Stefano
-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-
r-help mailing list -- Read http://www.ci.tuwien.ac.at/~hornik/R/R-FAQ.html
Send "info", "help", or "[un]subscribe"
(in the
2007 Jun 19
2
BIC and Hosmer-Lemeshow statistic for logistic regression
I haven't find any helpful thread. How can i calculate BIC and
Hosmer-Lemeshow statistic for a logistic regression model. I have used glm
for logistic fit.
--
View this message in context: http://www.nabble.com/BIC-and-Hosmer-Lemeshow-statistic-for-logistic-regression-tf3945943.html#a11193273
Sent from the R help mailing list archive at Nabble.com.
2012 Sep 30
1
Strategy for building a robust rare event logistic model - Questions.
Hello,
I am reaching out for a problem I have seem to hit wall on. I am trying to build a rare event model:- Default event occurred in NY/NJ area.
Some key statistics: 138 default aka 4bp (.04%).
Obviously my logistic and robust logistic models are failing Hosmer GOF tests and so I am thinking about bootstrapping data. I found a great read on R-help, but I was wondering if someone can help me
2010 Sep 01
1
[Q] Goodness-of-fit test of a logistic regression model using rms package
Hello,
I was looking for a way to evaluate the goodness-of-fit of a logistic regression model. After googling, I found that I could use "resid(fit, 'gof')" method implemented in the rms package. However, since I am not used to the "le Cessie-van Houwelingen normal test statistic," I do not know which statistic from the returned from the "resid(fit,
2007 Jul 26
2
logistic regression
Greetings,
I am working on a logistic regression model in R and I am struggling with the code, as it is a relatively new program for me. In searching Google for 'logistic regression diagnostics' I came Elizabeth Brown's Lecture 14 from her Winter 2004 Biostatistics 515 course (http://courses.washington.edu/b515/l14.pdf) . I found most of the code to be very helpful, but I am
2009 Jun 29
1
Hosmer Lemshaw
Hello R experts,
Is the a function to preform a Hosmer Lemshaw goodness of fit?
I am running R 2.8.
Thanks,
AlonBen-Ari
Department of Anesthesiology and CCM
Univ. Pittsburgh
[[alternative HTML version deleted]]
2013 Feb 26
2
Wiki Contribution Request
Username: BenHosmer
Title: Building an RPM from Scratch
Placement: http://wiki.centos.org/PackageManagement/Rpm
I went through the process of building and documenting how to build an RPM
from scratch using node.js as an example.
I'd like to contribute this guide back to the wiki please.
-------------- next part --------------
An HTML attachment was scrubbed...
URL:
2010 Feb 17
1
Checking the assumptions for a proper GLM model
Hello,
Are there any packages/functions available for testing the assumptions
underlying assumptions for a good GLM model? Like linktest in STATA
and smilar. If not, could somebody please describe their work process
when they check the validity of a logit/probit model?
Regards,
Jay
2004 Jul 06
3
Improving effeciency - better table()?
Hi,
I've been running some simulations for a while and the performance of R
has been great. However, I've recently changed the code to perform a sort
of chi-square goodness-of-fit test. To get the observed values for each
cell I've been using table() - specifically I've been using cut2 from
Hmisc to divide up the range into a specified number of cells and then
using