Odp: how to analysis a dataset with some missing value?

Hi
my qustion is if my miss value in my dataset is -9999
for example :
  1 3 21 33 -9999  23  33  -9999
how can I plot or analysis this dataset ignoring the missing value ? 
thanks
.
Use NA instead of -9999 and things will get better

x<-as.numeric(read.table(textConnection("1 3 21 33 -9999  23  33 -9999")))
y<- sample(x, 1000, replace=T)
plot(y)

y[y== -9999]<-NA
plot(y)

Regards
Petr
-- 
TANG Jie

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Odp: how to analysis a dataset with some missing value?

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