Displaying 3 results from an estimated 3 matches for "biogeographical".
2010 Sep 07
1
Multivariate Regression Trees: how to identify sample units?
Dear friends,
I am sudying the mvpart package, that implements Multivariate
Regression Trees, aiming at applying it to a biogeographical dataset of
tree speces in southern South America.
My doubt is how to access plot identities after the tree is produced.
For us it is rather important, but I could not find them with neither
'summary(fit)'[where fit is the object containing the mvpart(...)
command] nor just 'fit'...
2005 Mar 10
2
Logistic regression goodness of fit tests
I was unsure of what suitable goodness-of-fit tests existed in R for logistic regression. After searching the R-help archive I found that using the Design models and resid, could be used to calculate this as follows:
d <- datadist(mydataframe)
options(datadist = 'd')
fit <- lrm(response ~ predictor1 + predictor2..., data=mydataframe, x =T, y=T)
resid(fit, 'gof').
I set up a
2008 Dec 18
4
autologistic modelling in R
Hi,
I have spatially autocorrelated data (with a binary response variable and
continuous predictor variables). I believe I need to do an autologistic
model, does anyone know a method for doing this in R?
Many thanks
C Bell