Displaying 2 results from an estimated 2 matches for "ndwi".
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ndri
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 Brie...
2005 Feb 22
2
ERROR NaNs produced; when comparing two logistic regression models with the ANOVA CHI test
...dels with the anova CHi test, I
obtain the following error: (there are no NA's in the time series). How can
this be solved such that I can compare two models on the same dataset were
different explanatory variables are used?
l.KBDI <- glm(zna.arson2 ~ zna.KBDI,family = binomial)
l.NDWI <- glm(zna.arson2 ~ zna.NDWI,family = binomial)
anova(l.KBDI,l.NDWI, test = "Chi")
Analysis of Deviance Table
Model 1: zna.arson2 ~ zna.KBDI
Model 2: zna.arson2 ~ zna.NDWI
Resid. Df Resid. Dev Df Deviance P(>|Chi|)
1 110 123.227
2 110...