Hi there
I am a Masters student at the University of Stellenbosch. I have been using R
to analyze the data, using the GLS model, of one of my experiments.
The problem that I am having is that whenever I run my model using:
fit.glsmodel1<-gls(Number~as.factor(Season)+as.factor(Depth)+as.factor(Orientation),
data=Number, weights=varPower(), method="ML")
I get the error:
Error in glsEstimate(object, control = control) : computed "gls" fit is
singular, rank 8
I would like to know if anyone can tell me what is causing this error. Any
advice will be much appreciated.
Kind regards
Brendan
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