Hello everybody
I don't understand how I'm supposed to use svydesign caracteristics to explain
to R that my sampling design is the following one
Data base = tab1 here are the five first rows of the database (nrow = 11792)
num
esp
Quarters
Totcat
Totshp
Totgt
Tbtpos
fpc1
Totanim
Id_An
10
2045
G
01-Q1
0
0
12
1
551
10
10
11
2046
G
01-Q1
8
0
60
1
551
11
11
50
2070
G
01-Q1
0
3
6
1
551
50
50
51
2070
S
01-Q1
0
3
6
1
551
51
51
52
2070
S
01-Q1
0
3
6
1
551
52
52
- First strata = herds
herd's id column = num
sampled in 551 herds (column fpc1)
- Second strata = animals
animal id column= Id_An
sampled in Totanim
I tried :
clustot <- svydesign (id=~num+Id_An, fpc=~fpc1+~Totanim, data=tab1)
and I get this error message
> clustot <- svydesign(id=~num+Id_An, fpc=~fpc1+~Totanim, data=tab1)
Erreur dans as.fpc(fpc, strata, ids) :
FPC implies >100% sampling in some strata.
I don't have any strata with 100% sampling so do you know which arguments of
the fonction svydesign I'm supposed to use ?
Thanks in advance
AHOUSSOU Sylvie
Vétérinaire Epidémiologiste
CIRAD Domaine Duclos
97 170 Petit-Bourg
tel : 05 90 25 59 47
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