backdoor function

Backdoor criterion

Check backdoor criterion of a lvm object

backdoor(object, f, cond, ..., return.graph = FALSE)

Arguments

• object: lvm object
• f: formula. Conditioning, z, set can be given as y~x|z
• cond: Vector of variables to conditon on
• ...: Additional arguments to lower level functions
• return.graph: Return moral ancestral graph with z and effects from x removed

Examples

m <- lvm(y~c2,c2~c1,x~c1,m1~x,y~m1, v1~c3, x~c3,v1~y,
         x~z1, z2~z1, z2~z3, y~z3+z2+g1+g2+g3)
ll <- backdoor(m, y~x)
backdoor(m, y~x|c1+z1+g1)