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 NA
220 752 321 5264
I don't get any error messages, but d$var
You need to assign the output of missings() to something. For that
matter, missings() needs some output.
d - data.frame(a=1:5, b=6:10, var=c(1, 1, 998, 999, 2))
missings - function(x) {
x[x==998|x==999]-NA
x
}
d$var - missings(d$var)
d
a b var
1 1 6 1
2 2 7 1
3 3 8 NA
4 4
Hi,
On Sep 18, 2014, at 10:13 AM, Doreen Mueller doreen.muel...@dza.de wrote:
Hi!
I want to have a function that assigns NAs to certain values of my
variable var in the dataset d. This doesn't work:
missings=function(x) x[x==998|x==999]-NA
missings(d$var)
table(d$var, useNA=always)
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
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, 2009 at
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