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data(mort)
ccode
cname
bs
dg
dj
gj
ic
sl
ul
yy
mm
dd
date
nonacc
cardio
respir
influenza
meanpm10
meanso2
meanno2
meanco
maxco
maxo3
meantemp
maxtemp
mintemp
meanhumi
meanpress
season
dow
sn
data(mort) ## maybe str(mort) ; plot(mort) ...
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