empty character fields coerce NA, so instead,
you test for is.na()
df<-data.frame(x=c(1:6), var1=c(NA,1,2,NA,NA,4),var2=c(2,NA,NA,3,4,NA))
dfm<-vector("numeric",6)
index1<-!is.na(df$var1)
index2<-!is.na(df$var2)
dfm[index1]<-df$var1[index1]
dfm[index2]<-df$var2[index2]
On 5/5/2010 6:00 AM, n.via...@libero.it wrote:
Dear list,
I'm trying to concatenate the values of two columns but im not able to do it:
i have a dataframe with the following two columns:
X VAR1 VAR2
1 2
2 1
3
Dear list,
I'm trying to concatenate the values of two columns but im not able to do it:
i have a dataframe with the following two columns:
X VAR1 VAR2
1 2
2 1
3 2
4
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