Individual covariate syntaxis

questions concerning analysis/theory using programs M-SURGE, E-SURGE and U-CARE

Individual covariate syntaxis

Postby simone77 » Tue Oct 23, 2012 10:22 am

Hi,

I am not sure on how to write down the proper sentence with an individual covariate in E-SURGE.
I have just one covariate selected from my headed format file and in fact in the shortcut list I have that "bci" (the name it has in the data file) corresponds to xind(1).
Now, I have a transience matrix 3X3
[*-p
-*p
--p]
There are two age classes and I want to test in the same model (i) a general effect of an environmental covariate the same for both captured first time as juveniles (shortcut= juv) and captured first time as adults (shortcut=ad), and (ii) a bci effect on just juveniles. My attempt for transience would be:
a(1).[i+t*x(5)].[juv.xind(1)+ad]+a(2)
or perhaps
a(1).[i+t*x(5)].[juv.[i+xind(1)]+ad]+a(2)
(later in the IVFV I fix a(2)=0)

Is one of these sentences correct for what I want? By the way, is it the same writing xind or xind(1) when you have selected just one individual covariate?

Thanks in advance for any help,

Simone
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Re: Individual covariate syntaxis

Postby CHOQUET » Wed Oct 24, 2012 11:21 am

I prefer the second sentence:

a(1).[i+t*x(5)].[juv.[i+xind(1)]+ad]+a(2)
CHOQUET
 
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