Displaying 4 results from an estimated 4 matches for "arson".
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larson
2005 Apr 15
2
negetative AIC values: How to compare models with negative AIC's
Dear,
When fitting the following model
knots <- 5
lrm.NDWI <- lrm(m.arson ~ rcs(NDWI,knots)
I obtain the following result:
Logistic Regression Model
lrm(formula = m.arson ~ rcs(NDWI, knots))
Frequencies of Responses
0 1
666 35
Obs Max Deriv Model L.R. d.f. P C Dxy
Gamma Tau-a R2 Brier
701...
2005 Aug 12
0
HowTo derive a correct likelihood-ratio chi-squared statistic from lrm() with a rsc() ?
...are just the inverse of
the derived c-index and AIC (from the lrm) (?!). So the L.R. Model is higher
for the best model and not lower as explained above…
The models:
These are the models
knots <- 5
lrm.iRVI <- lrm(arson ~ rcs(iRVI,knots))
lrm.ARND <- lrm(arson ~ rcs(ARND,knots))
lrm.ARNDiRVI <- lrm(arson ~ rcs(ARND,knots)+rcs(iRVI,knots))
and the L.R. model values are bigger, the better the model becomes (it is
the inverse of our derived AIC and c-index). Normally, the...
2005 Aug 13
1
Penalized likelihood-ratio chi-squared statistic: L.R. model for Goodness of fit?
Dear R list,
From the lrm() binary logistic model we derived the G2 value or the
likelihood-ratio chi-squared statistic given as L.R. model, in the output of
the lrm().
How can this value be penalized for non-linearity (we used splines in the
lrm function)?
lrm.iRVI <- lrm(arson ~ rcs(iRVI,5),
penalty=list(simple=10,nonlinear=100,nonlinear.interaction=4))
This didn’t work properly.
The aim is to obtain a value that can be used to compare the goodness of fit
of the different univariate binary logistic models.
(The lower the value, the better the fit)...
2002 Jul 05
1
radiomatic
...0am
Weimar, Germany, On Air: 106,6 Mhz
http://www.radiostudio.org/streaps
contact: streaps@radiostudio.org
Everybody is welcome to connect with our new online mixing tool STREAPS
<p>RadioMatic is a on-line coop-system initiated by Jerome Joy and Ralf
Homann
between two art schools: Villa Arson in Nice (France) and Bauhaus Weimar
(Germany) and specially between the two sound studios AudioLab
(http://audiolab.villa-arson.org/) and RadioStudio
(http://radiostudio.org/). This project was born during a workshop in
Weimar last november.
Programmings team: Oliver Thuns, Hans Wastlhuber, Justus...