Dear all


please accept my apologized if my question is very basically


for finding the relation on fish larva and environmental factors i used
cozigam;


> res <- cozigam(Sillaginidae~s(temperature,salinity)+s(depth), constraint
= "proportional", family = gaussian)


the result:



Error in smooth.construct.tp.smooth.spec(object, dk$data, dk$knots) :

  A term has fewer unique covariate combinations than specified maximum
degrees of freedom


with is meaning exactly


thanks

-- 
Mahnaz

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