Dear all,
I have a problem when trying to fit a model to a dataset. The model I am
fitting is: y~var1*var2*var3*var4*var5, with var3 and var4 having many 0´s.
When I construct the model and I simplify it, it remains a model with 8
explicative variables (or interaction of them) and the intercept, but when I
try to plot the model, R gives me the following error:
Error in plot.new() : trying to draw in a null device
Furthermore: missing warning message
Not plotting observations with leverage one:
62, 78
What I do is the following:
model1=lm(Error ~ Ciottoli *Ghiaia *Limo *Massi *Sabbia, data=datos)
summary(model1)
model1=lm(y ~ var1 *var2 *var3 *var4 *var5, data=mydata)
summary(model1)
model.error=step(model1)
summary(model.error)
model2=update(model.error,~.-var2:var5)
summary(model2)
model3=update(model2,~.-var1:var5)
summary(model3)
model4=update(model3,~.-var1:var2)
summary(model4)
model5=update(model4,~.-var5)
summary(model5)
model6=update(model5,~.-var4)
summary(model6)
model7=update(model6,~.-var2)
summary(model7)
model8=update(model7,~.-var1)
summary(model8)
plot(model8)
I would be very please if you could throw light on this.
Thank you very much in advance!
Best wishes!
Manuel
[[alternative HTML version deleted]]
______________________________________________
R-help@r-project.org mailing list
https://stat.ethz.ch/mailman/listinfo/r-help
PLEASE do read the posting guide http://www.R-project.org/posting-guide.html
and provide commented, minimal, self-contained, reproducible code.
