Displaying 2 results from an estimated 2 matches for "mmfuller".
2011 Dec 19
2
On Corrections for Chi-Sq Goodness of Fit Test
TOPIC
My question regards the philosophy behind how R implements corrections to chi-square statistical tests. At least in recent versions (I'm using 2.13.1 (2011-07-08) on OSX 10.6.8.), the chisq.test function applies the Yates continuity correction for 2 by 2 contingency tables. But when used as a goodness of fit test (GoF, aka likelihood ratio test), chisq.test does not appear to implement
2006 Jun 02
1
geoR, plot of variog4 lines incomplete
...> trees90.vgm<-variog(trees.geo,max.dist=100,direction=pi/2)
> plot(trees90.vgm)
The second is a plot of a multidirectional variogram created using
variog4:
> trees.vgm4<-variog4(trees.geo,max.dist=100)
> plot(trees.vgm4)
The graphs are also available at:
www.tiem.utk.edu/~mmfuller/R_plots.pdf
You can see that the 90 degree line in the multi-line plot from
variog4 (dotted green line) does not include all the data shown in
the single 90 degree variogram (circles) plotted using variog. The
lines for other directions in the variog4 plot are also incompletely
drawn.
Any...