[R] how to create a new column with conditions

[Rasmus Liland]

On April 8, 2020 1:17:38 PM PDT, Ana Marija wrote:
| Hi,
| 
| I have a data frame like this:

Or ... *drum-roll* ... you could use plain 
old indexing.  Have a look:

a <-
"FID	LASER2	CURRELIG	PLASER	RTNPTHY
fam1000_G1000	1	1	1	1
fam1001_G1001	1	1	1	1
fam1003_G1003	2	1	2	2
fam1005_G1005	1	1	1	2
fam1009_G1009	1	1	1	2
fam1052_G1052	1	1	1	2"
a <- read.delim(text=a)

a$PHENO <- -9
a[a$CURRELIG==1 & a$RTNPTHY==1,"PHENO"] <- 1
a[a$PLASER==2,"PHENO"] <- 2

Best,
Rasmus