Displaying 10 results from an estimated 10 matches for "cessi".
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censi
2006 Apr 06
0
More Logistic Regression Tools?
...(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 <- update(f, x=T, y=T)
> resid(f, 'gof') # uses residuals.lrm
The documentation of the Design package, section residuals.lrm, says
<CITE>
Details
For the goodness-of-fit test, the le Cessie-...
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, 'gof')" call that I could use to evaluate the goodness of fit.
When I ran the "resid(fit, 'gof')", I got the following results:
##################...
2011 May 08
1
Hosmer-Lemeshow 'goodness of fit'
...#39;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
The above link indicated they should be approximately equal which in my case
they are not, any suggestions or is there a package function people would
recommend in R for use with a logistic regression model?
Thanks in advance,
-Rob Schutt
----...
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 test produce p-values such a small value (0.001687886) that suggest la...
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
2007 Aug 01
0
a question about d F(x, y; rho) / d rho = f(x, y; rho)
Hello,
My name is IKJIN LEE and I am studying in University of Iowa.
Recently, I have been trying to prove the fact d F(x, y; rho) / d rho =
f(x, y; rho),
but I could not. In the mean time, I found that Professor S. Le Cessie
from Netherlands kindly gave you an elegant proof of
d F(x, y; rho) / d rho = f(x, y; rho).
If you don't mind, can I know the proof?
IKJIN LEE
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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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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2002 May 01
3
bivariate normal cdf and rho
Suppose F(x, y; rho) is the cdf of a bivariate normal distribution, with
standardized marginals and correlation parameter rho. For any fixed x and
y, I wonder if F(x, y; rho) is a monotone increasing function of rho,
i.e., there is a 1 to 1 map from rho to F(x, y; rho).
I explored it using the function pmvnorm in package mvtnorm with
different x and y. The plot suggests the statement may be true.
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