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subset data frame by variable with missing value

ramoss 
Hello,

I have a variable in a data frame that contains NA values. I just want to
subset so that I get the obs where that variable is missing.
In SAS I would do:

data missing;
  set test;
  if myvalue=' ';
run;

How can I perform this simple task in R?

Thanks in advance for your help. 



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Thread (6 messages)

ramoss subset data frame by variable with missing value Nov 30 ramoss subset data frame by variable with missing value Nov 30 Marc Schwartz subset data frame by variable with missing value Nov 30 PIKAL Petr subset data frame by variable with missing value Nov 30 Milan Bouchet-Valat subset data frame by variable with missing value Nov 30 arun subset data frame by variable with missing value Nov 30