[R] filling blanks with NA

[K. Elo]

Hi,

kayj wrote:
> Hi,
> 
> I do have a data set with some missing values that appear as blanks. I want
> to fill these  blanks with an NA. How can this be done? Thanks for your help

Something like this?

> my.data<-data.frame("var"=c(1,2,5,"",66,4,3,"",67,5,3,2,1,4,32,56,23),
stringsAsFactors=F)

> my.data$var
 [1] "1"  "2"  "5"  ""   "66" "4"  "3"  ""   "67" "5"  "3"  "2"  "1"
"4"  "32" "56" "23"

> my.data$var[ my.data$var=="" ] <-NA
> my.data$var
 [1] "1"  "2"  "5"  NA   "66" "4"  "3"  NA   "67" "5"  "3"  "2"  "1"
"4"  "32" "56" "23"

Kind regards,
Kimmo