Hello everybody,
I know this is pretty basic stuff, but could anyone explain me how to
recode a single value of a variable
into a missing value?
I used to do it like this:
myData[myData$var1==5;"var1"]<-NA # recode value "5" into "NA"
But the column "var1" already contains NAs, which
results in the following error message:
"missing values are not allowed in subscripted assignments of data frames"
Thank you very much for any advice!
David
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