how to analysis a dataset with some missing value?

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

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TANG Jie

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