Question

missing data are represented as 9999.00 , 9999.0 and 9999.000 in a text file.
if I specify in the:

    Rcmdr->data->import->missing data indicator  as  9999,nothing will be assigned to NA.

   but when I assigned to 9999.0  then only the values of 9999.0 are assigned to NA.

is there any-idea on how to assign different values to NA within Rcmdr.
Here is the code added:

      Dataset <- 
    read.table("C:/Users/BRSa12002_L4_d.txt", 
     header=TRUE, sep=",", na.strings="-9999.00", dec=".", strip.white=TRUE)

Answer 1

From ?read.table we learn that argument na.strings takes a vector. Thus, you can use this to assign several different values as NA.

Dataset <- read.table("C:/Users/BRSa12002_L4_d.txt", 
               header=TRUE, sep=",", 
               na.strings=c("-9999.00","-9999.0","-9999"), 
               dec=".", strip.white=TRUE)