Displaying 20 results from an estimated 36 matches for "lemeshow".
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 at the following URL
http://www.stat.sc.edu/~hitchcock/diseaseoutbreakd...
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
l...
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 &l...
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.
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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
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?
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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 (abov...
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
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2008 Sep 22
0
the package of R which is related Hosmer?Lemeshow test?
the package of R which is related Hosmer?Lemeshow test?
--
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2007 May 25
0
Hosmer-lemeshow test for survival
Dear All,
I am looking for function's code to implement the Hosmer-Lemeshow gof test
for survival data.
Could anyone share it?
TIA
Mario
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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
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2002 Oct 21
2
More Logistic Regression Tools?
...unction was a
little more work than I expected.
I.e. I'm looking for something where you'd type
odds.ratios(fit)
and get:
Coefficient Odds ratio 95% CI
XXX 5.2 1.5 7.2
etc.
(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?
Thanks,
-Ekr
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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 omnibus test is unique
> and has more power usually. To get it:
>
> f <-...
2010 Jul 07
1
Different goodness of fit tests leads to contradictory conclusions
I am trying to test goodness of fit for my legalistic regression using several options as shown below. Hosmer-Lemeshow test (whose function I borrowed from a previous post), Hosmer–le Cessie omnibus lack of fit test (also borrowed from a previous post), Pearson chi-square test, and deviance test. All the tests, except the deviance tests, produced p-values well above 0.05. Would anyone please teach me why deviance...
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
2010 Aug 09
3
Logistic Regression in R (SAS -like output)
...have suggestions pertaining to other packages, or sample code
that replicates some of the SAS outputs for logistic regression, I
would be glad to hear of them.
Some of the requirements are:
- Stepwise variable selection for logistic regression
- Choose base level for factor variables
- The Hosmer-Lemeshow statistic
- concordant and discordant
- Tau C statistic
Thank you for your suggestions.
Regards,
Harsh Singhal
2006 Dec 14
3
Stepwise regression
...ing say forward regression is
that variables whose p value drops below a criterion (commonly 0.05)
become candidates for being included in the model, and the one with the
lowest p among these gets chosen, and the step is repeated until all p
values not in the model are above 0.05, cf Hosmer and Lemeshow (1989)
Applied Logistic Regression. The procedure does not require examination of
the AIC.
I am not well aquainted with R enough to understand the codes used in
step(), so can somebody tell me how step() works?
Thanks very much,
Tim
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 null deviance and residual deviance using a code as following:...
2005 Sep 13
1
logistic regression with nominal predictors
...a2.df, subset=STR==0)
for the contingency tables. There are zero cells, and for some values of
SEG, there is only one none-zero cell, i.e. some values of SEG determine
the output with certainty.
So initially I was thinking of a proportional odds logistic regression
model, but following Hosmer and Lemeshow [1], zero cells are
problematic. So I take out of the data table the deterministic values of
SEG, and I pool QUA=2 and QUA=3, and now I have a dychotomous outcome
(QUA = Good/Bad) and no zero cells.
The following model doesn't find evidence of interaction
glm(QUA ~ STR * SEG, data=data3.df, f...
2005 Jun 27
1
delta-beta's
Hi there
I have created a multivariate logistic regression model looking at the
presence/absence of disease on farms. I would like to plot the diagnostic
plots recommended by Hosmer & Lemeshow to look particularly for any points of
high influence. In order to do this I need to extract values for delta-beta.
The function dfbeta gives a value for change in each coefficient but I am
looking for a composite value that gives an overall measure of change to the
coefficients. It may be that d...