Dear all

maybe my question is very basically but i will be glad to find my problem

response variable is number larva in are that included many zero amount and
independent variables are included: temperature,salinity,o2,,,

in use of cozigam i toke  some mis messages such as:

 'x' is a list, but does not have components 'x' and 'y'

or

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

or
NA

            Estimate Std. Error z value Pr(>|z|)
(Intercept)   1.5816     3.0414   0.520 0.603052
alpha        -1.5758     0.4626  -3.407 0.000658 ***
delta1        0.4176     0.2826   1.478 0.139540
delta2        0.0000     0.0000      NA       NA

or

Warning message:
In sqrt(diag(V.theta)[2:(n.delta + 1)]) : NaNs produced

what are meaning? could you please explain them.

thanks all

-- 
Mahnaz Rabbaniha
marine ecology PhD
Iranian Fisheries Research Organization (IFRO)
P.O.Box: 14155-6116 , P.Code: 1411816618*
Tehran, IRAN
Phone:   +98 21 44580953
Fax:       +98 21 44580583

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