R help - Aug 2011 - how to analysis a dataset with some missing value?

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
.

-- 
TANG Jie

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if your vector of data is x, use x[x!=-9999]. Subseting entire data frames
works analogously.

HTH,
Daniel

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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
> 
>    [[alternative HTML version deleted]]
> 
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