r - How to apply a function that take multiple arguments which are both vectors? - 


chance<-c(0.11,0.12,0.13,0.14,0.15) aaa<-function(x,y) {   assignchance <- function (a,b,v) {     if (a == 0)       if (b == 0) 1-v       else v     else       if (b == 0) 0       else 1   }   sapply(x,assignchance,y,chance) # wrong } aaa(c(1,1,0,0,1),c(1,1,1,0,0))

i expect outcome as: 1, 1, 0.13, 0.86, 0

is there better way function. feel current attemp quite ugly in functional language can use array.map3 plue pattern match.

is there vector version of switch ifelse?

you looking mapply :

 mapply(assignchance,x,y,chance)

by using sapply in code, applying assignchance function every element of x in turn, , passing b , v arguments whole vectors y , chance. so, example, first iteration of sapply, resulting call :

assignchance(x[1],y,chance)

instead of :

assignchance(x[1],y[1],chance[1])

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