Displaying 2 results from an estimated 2 matches for "ancova2".
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ancova
2008 Jun 02
1
Ancova: formula with a common intercept
...0.01785 -1.195 0.241
p53plus 0.17059 0.78696 0.217 0.830
Time:p53plus 0.11887 0.02524 4.709 4.62e-05 ***
..
>From a plot of the data and the result of the linear model it looks like
the two categories share the same intercept. How do I define this? I
tried this:
> ancova2<-update(ancova,~.-1)
> summary(ancova2)
Call:
lm(formula = Result ~ Time + p53 + Time:p53 - 1)
..
Coefficients:
Estimate Std. Error t value Pr(>|t|)
Time -0.02134 0.01785 -1.195 0.241
p53minus 0.05919 0.55646 0.106 0.916
p53plus 0.22977 0.5...
2012 Jan 11
2
problems with glht for ancova
I've run an ancova, edadysexo is a factor with 3 levels,and log(lcc) is the
covariate (continous variable)
I get this results
> ancova<-aov(log(peso)~edadysexo*log(lcc))
> summary(ancova)
Df Sum Sq Mean Sq F value Pr(>F)
edadysexo 2 31.859 15.9294 803.9843 <2e-16 ***
log(lcc) 1 11.389 11.3887 574.8081 <2e-16 ***