[Solved] function that returns a value from column b when specifying a value from column a [closed]

by


We can use ==

exampledataframe$X2[exampledataframe$X1=="A"]

As a function

fun1 <- function(data, Var1, Var2, val){
           data[[Var2]][data[[Var1]]==val]
   }

fun1(exampledataframe, "X1", "X2", "B")
#[1] "4"

data

exampledataframe <- data.frame(X1= c("A", 1, "B", 2, "C"), 
               X2= c(3, "D", 4, "F", 5), stringsAsFactors=FALSE)

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solved function that returns a value from column b when specifying a value from column a [closed]