[R] reading csv file : blanks

[Jim Lemon]

Nattu wrote:
> Hi,
>
> I have a comma seperated data file which has blanks in it. I am trinying to
> import it to R using
>
> data1<-read.csv("oa_2006.csv", header = TRUE, sep = ",", quote="\"",
> dec=".")
>
> I want the missing values to be "NA". instead R reads them as "U". Any idea
> why this happens ?
>
>   
Hi Nataraju,
You have to explicitly specify the strings that you want to be read as 
NA with the na.strings argument.

na.strings=""

if an empty string represents NA.

Jim