[R] Get the location of a numeric element in a list

[Mohammad Tanvir Ahamed]

Can any one please help me. I will apply this for a very large list, about 400k vector in a list and vector size is unequal and large

Example : 
Input: 
a <- c(1,3,6,9,25,100) 
b<-c(10,7,20,2,25) 
c<-c(1,7,5,15,25,300,1000) 
d<-list(a,b,c) 

Expected outcome : 
# When looking for 1 in d
c(1,3)

# When looking for 7 in d

c(2,3)

# when looking for 25 in d
c(1,2,3)
# When looking for 50 in d
NULL or 0


Thanks in advance !!





Tanvir Ahamed 
Göteborg, Sweden  |  mashranga at yahoo.com