[R] faster way to use filter this

[Paul Tremblay]

I have the following (simplified) vectors:
index <- c("shoe"  "shirt" "fruit")
cost <- c(100, 50, 2)
data <- c("shirt", "shoe", "vegetable")

I want my outcome to be:

(50, 100, 0)

(shirt => 50, shoe => 100, vegetable => not found, so 0)

I have written the following function:


for (i in custom_list) {
+ this_cost <- cost[index == i]

+ message(this_cost)
+ }


This gives me (50, 100)

I haven't figured out how to use the ifelse. But more importantly, I think
there should be an easier, and faster way to do this with vectors?

Thanks!

Paul

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