Hi,
On Sep 18, 2014, at 10:13 AM, Doreen Mueller wrote:
> Hi!
>
> I want to have a function that assigns NAs to certain values of my
> variable "var" in the dataset "d". This doesn't work:
>
>> missings=function(x) x[x==998|x==999]<-NA
>> missings(d$var)
>> table(d$var, useNA="always")
>
>
You need to assign the output of missings() to something. For that
matter, missings() needs some output.
d <- data.frame(a=1:5, b=6:10, var=c(1, 1, 998, 999, 2))
missings <- function(x) {
x[x==998|x==999]<-NA
x
}
d$var <- missings(d$var)
> d
a b var
1 1 6 1
2 2 7 1
3 3 8 NA
Hi!
I want to have a function that assigns NAs to certain values of my
variable "var" in the dataset "d". This doesn't work:
> missings=function(x) x[x==998|x==999]<-NA
> missings(d$var)
> table(d$var, useNA="always")
0 1 999
220 752 321 5264
I don't get any error messages, but
This seems to work fine without the na.strings. Can you include the
data that you were reading:
> x <- read.table(textConnection("1,2,3,4
+ 5,,6,NA
+ ,7,NA,8
+ ,,NA,9"), sep=',')
> closeAllConnections()
> x
V1 V2 V3 V4
1 1 2 3 4
2 5 NA 6 NA
3 NA 7 NA 8
4 NA NA NA 9
On Thu, Mar 5, 200
I have a file where the missings are coded as NA or blank. how can I tell R
to read the data set and to consider the missings NA or a blank.
I tried the following
data<-read.table("data.txt", sep='\t', header=T, na.strings=c("NA",""))
is it correct? I am new to R and I am not sure if R is con
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