[R] Elementary Help
arun
smartpink111 at yahoo.com
Tue Jun 18 16:32:56 CEST 2013
Hi,
May be this helps:
set.seed(24)
dat1<- data.frame(ID=1:200,value=sample(c(5:200,NA),200,replace=TRUE))
which(is.na(dat1$value))
#[1] 56 146 184
sum(which(is.na(dat1$value))) #Not clear about the 2nd part of the question
#[1] 386
sum(is.na(dat1$value))
#[1] 3
table(is.na(dat1$value))
#FALSE TRUE
# 197 3
A.K.
>I am totally new to R, therefore probably this question will be very
easy for most of you. I have a range of values in a column ranging from 5 to 200. >Some of the values are missing, that is, not all student
numbers are there. How do I find which are these missing numbers and
obtain the sum of >these integers?
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